CN109653346B - Building construction method - Google Patents

Building construction method Download PDF

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Publication number
CN109653346B
CN109653346B CN201910102374.7A CN201910102374A CN109653346B CN 109653346 B CN109653346 B CN 109653346B CN 201910102374 A CN201910102374 A CN 201910102374A CN 109653346 B CN109653346 B CN 109653346B
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building
parts
polystyrene
agent
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CN109653346A (en
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马清浩
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Shanghai Tongyu Construction Engineering Technology Co.,Ltd.
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Shanghai Tongyu Construction Engineering Technology Co ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/16Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F112/00Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F112/02Monomers containing only one unsaturated aliphatic radical
    • C08F112/04Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F112/06Hydrocarbons
    • C08F112/08Styrene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02Monomers containing only one unsaturated aliphatic radical
    • C08F212/04Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06Hydrocarbons
    • C08F212/08Styrene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102Azo-compounds
    • C08J9/103Azodicarbonamide
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/141Hydrocarbons
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/16Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
    • E04B1/167Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with permanent forms made of particular materials, e.g. layered products
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/7608Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising a prefabricated insulating layer, disposed between two other layers or panels
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/04N2 releasing, ex azodicarbonamide or nitroso compound
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02Homopolymers or copolymers of hydrocarbons
    • C08J2325/04Homopolymers or copolymers of styrene
    • C08J2325/06Polystyrene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02Homopolymers or copolymers of hydrocarbons
    • C08J2325/04Homopolymers or copolymers of styrene
    • C08J2325/08Copolymers of styrene
    • C08J2325/14Copolymers of styrene with unsaturated esters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10Homopolymers or copolymers of propene
    • C08J2423/12Polypropene

Abstract

The invention discloses a building construction method, which comprises the following steps: (1) preparing a polystyrene modular building thermal insulation material; (2) preparing cementitious foamed concrete; (3) and pouring cementitious foaming concrete in the molded polystyrene modular building heat-insulating material to form a building body. The building construction method adopts modular forming, is simple to operate, saves cement, and simultaneously improves the antibacterial property, impact resistance, gelling property, flame retardance and corrosion resistance of a building structure.

Description

Building construction method
Technical Field
The invention relates to the technical field of buildings, in particular to a building construction method.
Background
With the rapid development of the urbanization process, the demand of building construction of various buildings is rapidly increased, and more buildings such as residential buildings, office buildings, industrial parks, public service places and the like are used. With the development of science and technology, the building energy-saving project becomes possible. At present, the building energy-saving engineering with more applications is to improve the heat preservation and insulation performance of buildings and reduce the energy consumption through the selection and design of building materials. The concrete outer wall heat insulating layer is a technology which is applied more, and the heat insulating layer comprises a cast-in-place construction method and a post-placement construction method.
The patent CN201710209110.2 provides a concrete pouring method of a concrete heat-insulating curtain wall, which comprises concrete preparation and concrete pouring, the concrete pouring method adopts a set of concrete pouring equipment, concrete is injected into the concrete separation equipment to generate concrete with two different particle sizes, stone concrete with the particle size of 5-10 mm enters a concrete one-side template of a surface layer through a fine aggregate outlet, stone concrete with the particle size of 10-30 mm enters a template on one side of structural concrete through a coarse aggregate outlet, the concrete with the two particle sizes is poured on one working surface at the same time, and the strength and the structural size of the concrete meet design requirements.
The patent CN201711310883.6 discloses a construction method of an inner wall, which comprises the steps of preparing concrete, building a wall, forming a wall blank and plastering, wherein the concrete is prepared by uniformly mixing broken stones, cement, water and a water reducing agent which are made of construction waste materials through a mixer, adding an expanding agent and continuously stirring, building reinforcing steel bars when building the wall, piling brick walls outside the reinforcing steel bars, pouring concrete into the brick walls and the reinforcing steel bars, and forming the wall blank after the concrete is solidified. The invention directly manufactures the sandstone through the construction waste, thereby effectively avoiding the waste of non-renewable resources.
At present, most of concrete materials for building construction, especially wall construction, adopt the traditional form of pouring concrete or foamed concrete and reinforcing steel bars, in order to ensure the strength of concrete, the using amount of cement is more, and too low cement using amount not only affects the density and strength of foamed concrete, but also seriously affects the pouring stability, even causes the die collapse. The strength, the corrosion resistance, the antibacterial property and the impact resistance of the constructed building are less researched, and the comprehensive performance needs to be improved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a building construction method, which comprises the steps of preparing cementitious foamed concrete and a polystyrene modular building heat-insulating material, pouring the cementitious foamed concrete into the polystyrene modular building heat-insulating material, adding reinforcing steel bars, and integrally forming to form structures such as walls, plates or columns of buildings. The building construction method adopts modular forming, is simple to operate, saves cement and simultaneously improves the comprehensive performance of a building structure.
The preparation method of the polystyrene modular building thermal insulation material comprises the steps of preparing antibacterial modified polystyrene and polystyrene, adding polypropylene short fibers for blending, foaming and forming at high temperature to prepare the antibacterial impact-resistant polystyrene modular building thermal insulation material.
The foaming concrete provided by the invention utilizes resin to improve the gelling property, the flame retardance and the corrosion resistance of the foaming concrete, and is combined with the accelerator provided by the invention to promote the hydration of related components of the foaming concrete, so that the aims of reducing the consumption of cement and improving the comprehensive performance of the foaming concrete are fulfilled.
In a first aspect, the method of building construction comprises: (1) preparing a polystyrene modular building thermal insulation material; (2) preparing cementitious foamed concrete; (3) and pouring cementitious foaming concrete in the molded polystyrene modular building heat-insulating material to form a building body.
Specifically, the building construction method comprises the following steps:
(1) preparing the modular building insulation material;
(2) preparing the cementitious foamed concrete;
(3) splicing the modular building heat-insulating material obtained in the step (1) into a building skeleton according to building requirements;
(4) erecting steel bars in the building skeleton in the step (3);
(5) pouring the cementitious foaming concrete in the step (2) into the building skeleton and the reinforcing steel frame, and forming a building after the foaming concrete is solidified;
(6) plastering outside the building body.
In a second aspect, the invention provides a modular building insulation material, which comprises antibacterial modified polystyrene, polypropylene fibers and an auxiliary agent; the raw materials for preparing the antibacterial modified polystyrene contain an antibacterial agent and styrene.
The antibacterial agent has a group which can be polymerized with styrene, preferably, the antibacterial agent is a quaternary ammonium compound with a carbon-carbon double bond, and more preferably, the antibacterial agent is methacryloyloxyethyl-benzyl-dimethyl ammonium chloride (DMAE-BC).
The organic antibacterial agent selected by the invention has high sterilization efficiency, low toxicity and good compatibility with organic polymer materials, and special performance can be obtained by changing the functional group of the organic antibacterial agent; the DMAE-BC has the advantages of low toxicity and strong antibacterial performance; according to the invention, DMAE-BC and styrene are subjected to polymerization reaction, DMAE-BC with an antibacterial function is introduced in a chemical bonding mode to prepare the antibacterial modified polystyrene, and then the antibacterial modified polystyrene is introduced into a polystyrene building material, so that the polystyrene building material can resist the corrosion of microorganisms, especially the corrosion of viruses and molds, in long-term use and natural environment; compared with a physical blending method, the antibacterial and antiseptic properties obtained by chemical bonding are more stable and durable; the DMAE-BC has high flash point, contains nitrogen and chlorine elements and has better flame retardant property, so the addition of the DMAE-BC has a promoting effect on improving the flame retardant property of the modular building heat-insulating material.
The polypropylene fiber is preferably polypropylene short fiber, and preferably, the length of the polypropylene short fiber is not more than 9 mm. The polypropylene fiber has the characteristics of impact resistance, corrosion resistance, wear resistance, low density/light weight, hydrophobicity and insulation, and is added into the modular building thermal insulation material as a filler, so that the impact resistance and the antibacterial performance of the modular building thermal insulation material can be improved by using a small amount of the polypropylene fiber.
The polystyrene has a relative molecular mass of 5 to 200000.
The auxiliary agent is selected from an emulsifier, a dispersion stabilizer, a foaming agent and a first initiator.
The first initiator is a peroxide compound or an azo compound, and is stable according to different reaction temperatures, preferably, the first initiator is dibenzoyl peroxide (a low-temperature first initiator), 1-bis (tert-butyl peroxide) -3, 3, 5-trimethylcyclohexane (a medium-temperature first initiator) and tert-butyl peroxybenzoate (a high-temperature first initiator), and most preferably, the first initiator is cumene hydroperoxide, which has a high boiling point and is stable and not decomposed at the polymerization temperature of styrene.
The blowing agent is a commercially available polystyrene blowing agent, in one embodiment of the invention the blowing agent is pentane, in another embodiment of the invention the blowing agent is azodicarbonamide (ac) blowing agent.
The dispersion stabilizer is a composite (organic and inorganic) dispersion stabilizer for suspension polymerization of commercially available styrene, in one embodiment of the present invention, the organic dispersion stabilizer is polyvinyl alcohol, and the inorganic dispersion stabilizer is tricalcium phosphate, in another embodiment of the present invention, the organic dispersion stabilizer is hydroxyethyl cellulose, and the inorganic dispersion stabilizer is tricalcium phosphate; the composite dispersion stabilizer can reduce the phenomenon of kettle sticking, has less use amount, not only has the function of improving the surface tension of a reaction area of the organic dispersion stabilizer, but also has the function of mechanically isolating the reaction area from a continuous medium area of the inorganic dispersion stabilizer.
The emulsifier is a commercially available emulsifier for styrene suspension polymerization, and in one embodiment of the invention, the emulsifier is sodium dodecyl benzene sulfonate.
The building thermal insulation material is based on 100 parts by weight of polystyrene, the antibacterial modified polystyrene is 2-5 parts by weight, and the polypropylene fiber is 5-10 parts by weight; in the antibacterial modified polystyrene, 0.1-1 part by weight of antibacterial agent and 1-4.9 parts by weight of styrene are used.
The addition amounts of the auxiliary agent and the first initiator are determined according to the actual process conditions. Preferably, the first initiator is 1 to 3 parts by weight, the foaming agent is 3 to 4 parts by weight, the organic dispersion stabilizer is 7 to 9 parts by weight, the inorganic dispersion stabilizer is 5 to 6 parts by weight, and the emulsifier is 3 to 5 parts by weight, based on 100 parts by weight of polystyrene.
In a third aspect, the preparation method of the modular building insulation material comprises the following steps: 1) the antibacterial agent and styrene are subjected to polymerization reaction under the action of a first initiator and an auxiliary agent to prepare the antibacterial modified polystyrene; 2) styrene is subjected to polymerization reaction under the action of a first initiator and an auxiliary agent to prepare polystyrene; 3) and blending, foaming and molding the antibacterial modified polystyrene, the polypropylene fiber and the polystyrene to prepare the modular building thermal insulation material.
Specifically, the preparation method of the modular building thermal insulation material comprises the following steps:
(a) dissolving 1-3 parts by weight of initiator into 20-25 parts by weight of distilled water at normal temperature to obtain a first initiator solution;
(b) dissolving 7-9 parts by weight of organic dispersion stabilizer in 15-20 parts by weight of distilled water at normal temperature, slowly adding 5-6 parts by weight of inorganic dispersion stabilizer into the solution, and performing ultrasonic treatment for 10-20 minutes to obtain dispersion stabilizer;
(c) dissolving 3-5 parts by weight of emulsifier in 10-15 parts by weight of distilled water at normal temperature to obtain an emulsion;
(d) adding 1-4.9 parts by weight of styrene, 0.1-1 part by weight of antibacterial agent and 0.6-0.8 part by weight of foaming agent into one fifth part by weight of the first initiator solution in the step (a), then adding one fifth part by weight of the dispersion stabilizing solution in the step (b) and one fifth part by weight of the emulsion in the step (c), uniformly stirring, feeding into a reaction kettle, dropwise adding 1-5% ammonia water, adjusting the pH value to 7-9, introducing nitrogen, keeping the temperature and stirring at 50-60 ℃ for 9-10 hours, discharging and cooling to obtain the antibacterial modified polystyrene;
(e) adding styrene and 2.4-3.2 parts by weight of foaming agent into four fifths of the first initiator solution in the step (a), adding four fifths of the dispersion stabilizing solution in the step (b) and four fifths of the emulsion in the step (c) by weight, uniformly stirring, feeding into a reaction kettle, adjusting the pH to be 6.5-7.5, introducing nitrogen, keeping the temperature and stirring at 80-90 ℃ for 9-10 hours, discharging and cooling to obtain polystyrene;
(f) and (c) mixing the antibacterial modified polystyrene obtained in the step (d) and the polystyrene obtained in the step (e), feeding the mixture into a reaction kettle, adding 5-10 parts by weight of polypropylene fibers, uniformly stirring, adjusting the temperature of the reaction kettle to be 110-120 ℃, carrying out heat preservation and heating for 2-3 hours, foaming at high temperature, and forming to obtain the modular building heat-preservation material.
The first initiator is a peroxide compound or an azo compound, and preferably, the first initiator is cumene hydroperoxide.
Preferably, the organic dispersion stabilizer is polyvinyl alcohol or hydroxymethyl cellulose, and the inorganic dispersion stabilizer is tricalcium phosphate.
Preferably, the emulsifier is sodium dodecyl benzene sulfonate.
Preferably, the antimicrobial agent is DMAE-BC.
Preferably, the blowing agent is a pentane or azodicarbonamide (ac) blowing agent.
In a fourth aspect, the invention provides a cementitious foamed concrete, which contains cement, fine aggregates, coarse aggregates and active micro aggregates, and is characterized in that the foamed concrete also contains resin and auxiliaries, wherein the resin contains modified unsaturated polyester resin, the modified unsaturated polyester resin is rubber modified unsaturated polyester resin, and the rubber modified unsaturated polyester resin is rubber modified epoxy vinyl ester resin.
Preferably, the epoxy vinyl ester resin is bisphenol a epoxy vinyl resin, more preferably, the molecular weight of the bisphenol a epoxy vinyl resin is 6000-12000, and double bonds at two ends of a molecular chain of the bisphenol a epoxy vinyl resin are more active, so that the bisphenol a epoxy vinyl resin can be rapidly cured to obtain the use strength and has higher corrosion resistance, hydrolysis resistance and cracking resistance.
The raw material for preparing the rubber contains an olefin monomer and a second initiator, preferably, the olefin monomer is an organic compound with two terminal groups of carbon-carbon double bonds, more preferably, the olefin monomer is selected from butadiene, isoprene and chloroprene, and most preferably, the olefin monomer is chloroprene. The rubber polymerized by butadiene, isoprene or chloroprene has excellent wear resistance, corrosion resistance and heat resistance, especially the rubber prepared by chloroprene has nonflammability and can self-extinguish after catching fire; the rubber modified resin material with excellent performance is added into the foamed concrete, so that the wear resistance, corrosion resistance and flame retardant property of the foamed concrete can be improved.
The resin may also include an epoxy resin, preferably the epoxy resin is a bisphenol a epoxy resin, more preferably the bisphenol a epoxy resin is a bisphenol a epoxy resin having a medium epoxy value, the medium epoxy value being 0.25 to 0.45.
The auxiliary agent is selected from a surfactant, an accelerator, a resin curing agent, a second initiator, a foaming agent, fibers, a stabilizer, a water reducing agent and an air entraining agent.
Preferably, the surfactant is selected from sodium dodecylbenzene sulfonate and sodium dodecyl sulfate. The surfactant improves the interface state among resin organic matters, mineral inorganic matters and foams in the mixing process of the foamed concrete slurry, and promotes the slurry to be uniformly dispersed and mixed.
The accelerator contains an alcohol amine compound and a sulfate compound, preferably, the alcohol amine compound is diethanol monopropylene glycol amine, and the sulfate compound is dibutyl sulfate. The accelerator promotes hydration of cement and other mineral substances in the foamed concrete, so that the overall gelling property of the foamed concrete is improved, and ideal gelling property and strength can be achieved under the condition of reducing the cement consumption.
The resin curing agent comprises an unsaturated polyester resin curing agent and/or an epoxy resin curing agent.
Preferably, the unsaturated polyester resin curing agent is methyl ethyl ketone peroxide and cyclohexanone peroxide. The unsaturated polyester resin curing agent plays a role of a second initiator, so that the unsaturated polyester resin and styrene are subjected to polymerization reaction to carry out crosslinking curing.
Preferably, the epoxy resin curing agent is a room temperature epoxy resin curing agent, more preferably, the epoxy resin curing agent is selected from aliphatic polyamines, alicyclic polyamines, low molecular polyamides and modified aromatic amines, and more preferably, the epoxy resin curing agent is selected from ethylenediamine, diethylenetriamine and m-xylylenediamine.
The second initiator is a peroxide compound or an azo compound, and preferably, the second initiator is cumene hydroperoxide.
The foaming agent is selected from rosin resin foaming agents, synthetic surfactants and protein foaming agents, and preferably, the foaming agent is selected from sodium dodecyl benzene sulfonate, alkylphenol ethoxylates and tea saponin foaming agents.
Preferably, the fibers are polypropylene fibers, and the fibers can promote the cementation of the components of the foamed concrete and can increase the toughness and the impact resistance of the foamed concrete.
Preferably, the stabilizer is calcium stearate.
Preferably, the water reducing agent is a commercially available melamine, polycarboxylic acid and naphthalene water reducing agent.
Preferably, the air entraining agent is commercially available rosin resins, alkyl benzene sulfonates and fatty alcohol sulfonates.
The cement is commercially available portland cement.
The fine aggregate is selected from commercially available sand and/or ore powder with a particle size of less than 4.75 mm.
The coarse aggregate is selected from commercially available crushed stone, pebble, broken gravel, slag and/or waste slag with the grain size of more than 4.75 mm.
The active micro-aggregate is fly ash, preferably, the active micro-aggregate is first-grade fly ash and/or superfine slag. The first-level fly ash and the superfine slag belong to high-activity micro-aggregates, and the proportion of cement in the foamed concrete can be reduced.
The cementitious foamed concrete also comprises styrene, and the styrene and the unsaturated polyester resin are subjected to polymerization reaction under the action of the unsaturated polyester resin curing agent to carry out crosslinking curing.
The cementitious foaming concrete is based on 100 parts by weight of cement, the resin is 1-5 parts by weight, the fine aggregate is 5-20 parts by weight, the coarse aggregate is 1-20 parts by weight, the active micro aggregate is 1-10 parts by weight, and the styrene is 0.2-1 part by weight.
Specifically, the rubber modified epoxy vinyl ester resin accounts for 1-4 parts by weight, and the bisphenol A epoxy resin accounts for 0.1-1 part by weight.
0.1-0.3 part by weight of rubber and 0.1-3.95 parts by weight of epoxy vinyl ester resin; the olefin monomer is 0.05 to 0.3 weight part, and the second initiator is 0.01 to 0.03 weight part.
The accelerator is 0.5-5 parts by weight, wherein the diethylene glycol monopropylene glycol amine is 0.2-2 parts by weight, and the dibutyl sulfate is 0.3-3 parts by weight.
The dosage of other auxiliary agents is determined according to the actual process condition. Preferably, based on 100 parts by weight of cement, the surfactant is 0.1-1 part by weight, the resin curing agent is 0.02-0.3 part by weight, the foaming agent is 1-3 parts by weight, the fiber is 1-8 parts by weight, the stabilizer is 0.05-0.2 part by weight, the water reducing agent is 0.5-1 part by weight, and the air entraining agent is 0.01-0.05 part by weight.
In the resin curing agent, the unsaturated polyester resin curing agent accounts for 0.005-0.2 part by weight, and the epoxy resin curing agent accounts for 0.005-0.1 part by weight.
In a fifth aspect, the method for preparing the cementitious foamed concrete of the present invention comprises: 1) the preparation raw material of the rubber and the epoxy vinyl ester resin are subjected to polymerization reaction under the action of a second initiator to prepare the rubber modified epoxy vinyl ester resin; 2) preparing the accelerator; 3) preparing foam and gel slurry; 4) and stirring and mixing the foam, the gelled slurry and the auxiliary agent to prepare the gelled foamed concrete.
Specifically, the preparation method comprises the following steps:
(a) at normal temperature, dissolving the second initiator in 20-25 parts by weight of water to obtain a second initiator solution;
(b) preparing a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution by referring to the method in the step (a);
(c) adding the olefin monomer and the epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature at 70-90 ℃, stirring for 5-6 hours, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
(d) at normal temperature, dissolving the diethanol monopropylene glycol amine and the dibutyl sulfate in 25-30 parts by weight of water, and uniformly stirring to obtain the accelerator solution;
(e) adding the foaming agent into 10-15 parts by weight of water to obtain foaming diluent, and then sending the foaming diluent into a foaming machine to prepare foam;
(f) adding the cement, the fine aggregate, the coarse aggregate and the active micro aggregate into 30-40 parts by weight of water, and uniformly stirring in a stirrer to obtain slurry;
(g) adding the rubber modified epoxy vinyl ester resin, the epoxy resin, the surfactant and the styrene into the slurry, and uniformly stirring to obtain gelled slurry;
(h) and adding the foam, the accelerator solution, the fiber, the resin curing agent solution, the stabilizer solution, the water reducing agent solution and the air entraining agent solution into the cementitious slurry, and uniformly stirring in a stirrer to obtain the cementitious foamed concrete.
Preferably, the second initiator is cumene hydroperoxide, the stabilizer is calcium stearate, the water reducing agent is melamine, and the air entraining agent is alkylbenzene sulfonate and/or fatty alcohol sulfonate.
Preferably, the resin curing agent is an unsaturated polyester resin curing agent and an epoxy resin curing agent; the unsaturated polyester resin curing agent is cyclohexanone peroxide, and the epoxy resin curing agent is ethylenediamine and/or m-xylene diamine.
Preferably, the epoxy vinyl ester resin is bisphenol a epoxy vinyl resin, and the olefin monomer is selected from butadiene, isoprene and chloroprene; the epoxy resin is bisphenol A epoxy resin with a medium epoxy value, and the medium epoxy value is 0.25-0.45.
Preferably, the surfactant is sodium dodecyl benzene sulfonate, and the foaming agent is sodium dodecyl benzene sulfonate and/or alkylphenol ethoxylates.
Preferably, the cement is portland cement, the fine aggregate is sand with the particle size of less than 4.75mm, the coarse aggregate is broken stone and slag with the particle size of more than 4.75mm, the active micro-aggregate is first-grade fly ash, and the fiber is polypropylene fiber.
Detailed Description
Unless defined otherwise, all scientific and technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The following preparation examples are intended to illustrate the invention but are not intended to limit it.
Polystyrene modular building thermal insulation material
The polystyrene used in the following comparative examples and preparation examples had a relative molecular mass of 100000 and the length of the polypropylene fiber was 9 mm.
1. The performances of the polystyrene building material without the antibacterial agent and the polypropylene fiber, the polystyrene building material with only one modifier (the antibacterial agent or the polypropylene fiber) and the modular building thermal insulation material with the antibacterial agent and the polypropylene fiber are compared.
Comparative example 1
The preparation method of the polystyrene building material without containing the antibacterial agent and the polypropylene fiber comprises the following steps:
(1) dissolving 8 parts by weight of polyvinyl alcohol in 18 parts by weight of distilled water at normal temperature, adding 5 parts by weight of tricalcium phosphate into the solution, and performing ultrasonic treatment for 10-20 minutes to obtain dispersed stable liquid;
(2) dissolving 3 parts by weight of sodium dodecyl benzene sulfonate in 12 parts by weight of distilled water at normal temperature to obtain an emulsion;
(3) dissolving 2 parts by weight of cumene hydroperoxide in 20 parts by weight of distilled water at normal temperature to obtain a first initiator solution;
(4) adding 100 parts by weight of styrene and 3 parts by weight of foaming agent into a first initiator solution, adding dispersion stabilizing solution and emulsion, stirring uniformly, feeding into a reaction kettle, adjusting the pH to 6.5-7.5, introducing nitrogen, keeping the temperature and stirring for 9-10 hours at 80-90 ℃, discharging and cooling to obtain polystyrene;
(5) and (3) feeding the polystyrene prepared in the step (4) into a reaction kettle, uniformly stirring, adjusting the temperature of the reaction kettle to be 110-120 ℃, carrying out heat preservation and heating for 2-3 hours, and carrying out high-temperature foaming and molding to obtain the common modular building heat-insulating material.
Comparative example 2
The preparation method of the polystyrene building material only containing the antibacterial agent comprises the following steps:
(1) dissolving 2 parts by weight of cumene hydroperoxide in 20 parts by weight of distilled water at normal temperature to obtain a first initiator solution;
(2) dissolving 8 parts by weight of polyvinyl alcohol in 18 parts by weight of distilled water at normal temperature, adding 5 parts by weight of tricalcium phosphate into the solution, and performing ultrasonic treatment for 10-20 minutes to obtain dispersed stable liquid;
(3) dissolving 3 parts by weight of sodium dodecyl benzene sulfonate in 12 parts by weight of distilled water at normal temperature to obtain an emulsion;
(4) adding 4.5 parts by weight of styrene, 0.5 part by weight of DMAE-BC and 0.6 part by weight of foaming agent into 4.4 parts by weight of the first initiator solution in the step (1), then adding 6.2 parts by weight of the dispersion stabilizing solution in the step (2) and 5 parts by weight of the emulsion in the step (3), uniformly stirring, feeding into a reaction kettle, dropwise adding 1-5% ammonia water, adjusting the pH to 7-9, introducing nitrogen, stirring for 9-10 hours at 50-60 ℃, discharging and cooling to obtain the antibacterial modified polystyrene;
(5) adding 100 parts by weight of styrene and 2.4 parts by weight of foaming agent into 17.6 parts by weight of the first initiator solution in the step (1), adding 24.8 parts by weight of the dispersion stabilizing solution in the step (2) and 10 parts by weight of the emulsion in the step (3), uniformly stirring, feeding into a reaction kettle, adjusting the pH to 6.5-7.5, introducing nitrogen, stirring for 9-10 hours at the temperature of 80-90 ℃, discharging and cooling to obtain polystyrene;
(6) and (3) mixing the antibacterial modified polystyrene prepared in the step (4) and the polystyrene prepared in the step (5), feeding the mixture into a reaction kettle, uniformly stirring, adjusting the temperature of the reaction kettle to be 110-120 ℃, carrying out heat preservation and heating for 2-3 hours, foaming at high temperature, and forming to obtain the modular building heat-insulating material.
Comparative example 3
The preparation method of the polystyrene building material only containing polypropylene fibers comprises the following steps:
(1) dissolving 2 parts by weight of cumene hydroperoxide in 20 parts by weight of distilled water at normal temperature to obtain a first initiator solution;
(2) dissolving 8 parts by weight of polyvinyl alcohol in 18 parts by weight of distilled water at normal temperature, adding 5 parts by weight of tricalcium phosphate into the solution, and performing ultrasonic treatment for 10-20 minutes to obtain dispersed stable liquid;
(3) dissolving 3 parts by weight of sodium dodecyl benzene sulfonate in 12 parts by weight of distilled water at normal temperature to obtain an emulsion;
(4) adding 100 parts by weight of styrene and 3 parts by weight of foaming agent into a first initiator solution, adding dispersion stabilizing solution and emulsion, stirring uniformly, feeding into a reaction kettle, adjusting the pH to 6.5-7.5, introducing nitrogen, keeping the temperature and stirring for 9-10 hours at 80-90 ℃, discharging and cooling to obtain polystyrene;
(5) and (3) feeding the polystyrene prepared in the step (4) and 7 parts by weight of polypropylene fiber into a reaction kettle, uniformly stirring, adjusting the temperature of the reaction kettle to 110-120 ℃, carrying out heat preservation and heating for 2-3 hours, and carrying out high-temperature foaming and molding to obtain the modular building heat-insulating material.
Preparation example 1
The preparation method of the modular building thermal insulation material comprises the following steps:
(1) dissolving 2 parts by weight of cumene hydroperoxide in 20 parts by weight of distilled water at normal temperature to obtain a first initiator solution;
(2) dissolving 8 parts by weight of polyvinyl alcohol in 18 parts by weight of distilled water at normal temperature, adding 5 parts by weight of tricalcium phosphate into the solution, and performing ultrasonic treatment for 10-20 minutes to obtain dispersed stable liquid;
(3) dissolving 3 parts by weight of sodium dodecyl benzene sulfonate in 12 parts by weight of distilled water at normal temperature to obtain an emulsion;
(4) adding 4.5 parts by weight of styrene, 0.5 part by weight of DMAE-BC and 0.6 part by weight of foaming agent into 4.4 parts by weight of the first initiator solution in the step (1), then adding 6.2 parts by weight of the dispersion stabilizing solution in the step (2) and 5 parts by weight of the emulsion in the step (3), uniformly stirring, feeding into a reaction kettle, dropwise adding 1-5% ammonia water, adjusting the pH to 7-9, introducing nitrogen, stirring for 9-10 hours at 50-60 ℃, discharging and cooling to obtain the antibacterial modified polystyrene;
(5) adding 100 parts by weight of styrene and 2.4 parts by weight of foaming agent into 17.6 parts by weight of the first initiator solution in the step (1), adding 24.8 parts by weight of the dispersion stabilizing solution in the step (2) and 10 parts by weight of the emulsion in the step (3), uniformly stirring, feeding into a reaction kettle, adjusting the pH to 6.5-7.5, introducing nitrogen, stirring for 9-10 hours at the temperature of 80-90 ℃, discharging and cooling to obtain polystyrene;
(6) and (3) mixing the antibacterial modified polystyrene prepared in the step (4) and the polystyrene prepared in the step (5), feeding the mixture into a reaction kettle, adding 7 parts by weight of polypropylene fiber, uniformly stirring, adjusting the temperature of the reaction kettle to 110-120 ℃, carrying out heat preservation and heating for 2-3 hours, and carrying out high-temperature foaming and molding to obtain the modular building heat-insulating material.
The polystyrene building materials of preparation example 1 and comparative examples 1-3 were tested for antibacterial properties according to the method described in GB/T31402-2015. The impact strength of the polystyrene building materials in preparation example 1 and comparative examples 1 to 3 was expressed by Izod impact strength. The flame retardant properties of the polystyrene building materials of preparation example 1 and comparative examples 1-3 were examined using American flame retardant Standard ANSI/UL-94-1985. The test data of the polystyrene building materials prepared in the above preparation example 1 and comparative examples 1 to 3 are shown in table 1.
TABLE 1 comparison of the Properties of the polystyrene building materials of preparation example 1 and comparative examples 1 to 3
The results of table 1 show that the antibacterial property and flame retardant property of comparative example 2, in which the antibacterial agent was added alone, were significantly enhanced; the impact resistance of the comparative example 3 in which the polypropylene fiber is separately added is remarkably enhanced, and the antibacterial performance is also enhanced compared with that of the comparative example 1; the antibacterial performance of preparation example 1, in which the antibacterial agent and the polypropylene fiber were added, was further enhanced, the impact resistance was equivalent to the level of comparative example 3, and the flame retardancy was equivalent to the level of comparative example 2. Experimental results prove that the antibacterial property and the flame retardance of the polystyrene building material can be obviously improved by adding the antibacterial agent, the impact resistance of the polystyrene building material can be obviously improved by adding the polypropylene fiber, and meanwhile, the antibacterial property of the polystyrene building material can also be properly improved.
2. And (3) adding the antibacterial agent into the polystyrene building material in a chemical bonding and blending mode respectively for performance comparison.
The modular building thermal insulation material prepared in preparation example 1 was selected as a sample to which an antibacterial agent was added in a chemically bonded manner.
Preparation example 2
The preparation method of adding the antibacterial agent into the polystyrene building material in a blending way comprises the following steps:
(1) dissolving 8 parts by weight of polyvinyl alcohol in 18 parts by weight of distilled water at normal temperature, adding 5 parts by weight of tricalcium phosphate into the solution, and performing ultrasonic treatment for 10-20 minutes to obtain dispersed stable liquid;
(2) dissolving 0.6 weight part of sodium dodecyl benzene sulfonate in 12 weight parts of distilled water at normal temperature to obtain an emulsion;
(3) dissolving 2 parts by weight of cumene hydroperoxide in 20 parts by weight of distilled water at normal temperature to obtain a first initiator solution;
(4) taking 4.5 parts by weight of styrene and 0.5 part by weight of DMAE-BC, adding into 22 parts by weight of distilled water, adding 0.6 part by weight of foaming agent, and uniformly stirring to obtain the antibacterial modified polystyrene;
(5) adding 100 parts by weight of styrene and 2.4 parts by weight of foaming agent into a first initiator solution, adding dispersion stabilizing solution and emulsion, stirring uniformly, feeding into a reaction kettle, adjusting the pH to 6.5-7.5, introducing nitrogen, keeping the temperature and stirring for 9-10 hours at 80-90 ℃, discharging and cooling to obtain polystyrene;
(6) and (3) mixing the antibacterial modified polystyrene prepared in the step (4) and the polystyrene prepared in the step (5), feeding the mixture into a reaction kettle, adding 7 parts by weight of polypropylene fiber, uniformly stirring, adjusting the temperature of the reaction kettle to 110-120 ℃, carrying out heat preservation and heating for 2-3 hours, and carrying out high-temperature foaming and molding to obtain the modular building heat-insulating material.
The polystyrene building materials of preparation examples 1 and 2 were tested for antibacterial properties according to the method described in GB/T31402-2015, and the results are shown in Table 2.
TABLE 2 comparison of the antibacterial Properties of the polystyrene building materials of preparation examples 1 and 2
The results in Table 2 show that the antibacterial performance of preparation example 1 was relatively stable in 7-day experiments, with substantially no decay, demonstrating that the antibacterial agent was stably present in polystyrene building materials; the antibacterial performance of preparation example 2 was substantially equivalent to that of preparation example 1 on the first day, but the antibacterial performance rapidly decreased as the experimental time was prolonged. Therefore, the antibacterial agent is added in a chemical bonding mode, so that the antibacterial performance of the polystyrene building material is more durable and stable.
3. And (3) comparing the antibacterial performance of the modular building thermal insulation materials prepared from different antibacterial agents.
The following selected antibacterial agents were DMAE-BC, methacryloxydodecyl bromopyridine (MDPB), methacryloxyethyl-n-hexadecyl-dimethyl ammonium bromide (DMAE-CB), respectively.
Preparation example 3
This preparation example was carried out in the same manner and using the same amounts as in preparation example 1 except that the antibacterial agent was methacryloyloxyethyl-n-hexadecyl-dimethylammonium bromide (DMAE-CB).
Preparation example 4
This preparation example was carried out in the same manner as in preparation example 1 except that the antibacterial agent was Methacryloyloxydodecylbromopyridine (MDPB).
The antibacterial properties of the modular building insulation materials of preparation examples 1 and 3-4 were tested according to the method described in GB/T31402-2015 and the results are listed in Table 3.
TABLE 3 comparison of antimicrobial Properties of the Modular building insulation of preparation examples 1 and 3-4
The results in Table 3 show that the modular building insulation material prepared in preparation example 1 has the highest antibacterial performance compared with preparation examples 3-4, and the antibacterial agent DMAE-BC is proved to be capable of providing better antibacterial performance for the modular building insulation material.
In conclusion, the antibacterial agent and the polypropylene fiber are modified to prepare the modular building thermal insulation material, so that the antibacterial property, the impact resistance and the flame retardance of the modular building thermal insulation material are improved, and the comprehensive performance of the material is enhanced.
Second, foamed concrete
In the following specific embodiment, the second initiator is cumene hydroperoxide, the stabilizer is calcium stearate, the water reducing agent is melamine, and the air entraining agent is an alkylbenzene sulfonate type air entraining agent; the resin curing agent is an unsaturated polyester resin curing agent and an epoxy resin curing agent; the unsaturated polyester resin curing agent is cyclohexanone peroxide, and the epoxy resin curing agent is ethylenediamine; the epoxy vinyl ester resin is bisphenol A epoxy vinyl resin with the molecular weight of 10000, the olefin monomer is chloroprene, and the epoxy resin is bisphenol A epoxy resin with the epoxy value of 0.25; the surfactant is sodium dodecyl benzene sulfonate, and the foaming agent is alkylphenol polyoxyethylene; the cement is portland cement, the fine aggregate is sand with the particle size smaller than 4.75mm, the coarse aggregate is broken stone and slag with the particle size larger than 4.75mm, the active micro aggregate is first-grade fly ash, and the fiber is polypropylene fiber.
1. The performance of the ordinary foamed concrete without resin and accelerator, the foamed concrete with only one kind of gelling modifier (resin or accelerator) and the performance of the gelled foamed concrete with resin and accelerator are compared.
Comparative example 4
The preparation method of the common foaming concrete without resin and accelerator comprises the following steps:
(1) respectively dissolving 0.1 part by weight of stabilizer, 0.5 part by weight of water reducer and 0.03 part by weight of air entraining agent into 20-25 parts by weight of water at normal temperature to respectively prepare a stabilizer solution, a water reducer solution and an air entraining agent solution;
(2) adding 2 parts by weight of foaming agent into 10-15 parts by weight of water to obtain foaming diluent, and then sending the foaming diluent into a foaming machine to prepare foam;
(3) adding 100 parts by weight of cement, 15 parts by weight of fine aggregate, 10 parts by weight of coarse aggregate and 5 parts by weight of active micro aggregate into 30-40 parts by weight of water, and uniformly stirring in a stirrer to obtain slurry;
(4) and (3) adding the foam obtained in the step (2), 5 parts by weight of fiber, a stabilizer solution, a water reducing agent solution and an air entraining agent solution into the slurry, and uniformly stirring in a stirrer to obtain the common foamed concrete.
Comparative example 5
The preparation method of the foamed concrete only containing the epoxy resin comprises the following steps:
(1) respectively dissolving 0.1 part by weight of resin curing agent, 0.1 part by weight of stabilizer, 0.5 part by weight of water reducing agent and 0.03 part by weight of air entraining agent in 20-25 parts by weight of water at normal temperature to respectively prepare a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution;
(2) adding 2 parts by weight of foaming agent into 10-15 parts by weight of water to obtain foaming diluent, and then sending the foaming diluent into a foaming machine to prepare foam;
(3) adding 100 parts by weight of cement, 15 parts by weight of fine aggregate, 10 parts by weight of coarse aggregate and 5 parts by weight of active micro aggregate into 30-40 parts by weight of water, and uniformly stirring in a stirrer to obtain slurry;
(4) adding 1 part by weight of epoxy resin and 1 part by weight of surfactant into the slurry obtained in the step (3), and uniformly stirring to obtain gelled slurry;
(5) and (3) adding the foam obtained in the step (2), 5 parts by weight of fiber, a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution into the gelled slurry obtained in the step (4), and uniformly stirring in a stirrer to obtain the foamed concrete.
Comparative example 6
The preparation method of the foamed concrete only containing the rubber modified epoxy vinyl ester resin and the epoxy resin comprises the following steps:
(1) dissolving 0.03 weight part of a second initiator in 20-25 weight parts of water at normal temperature to obtain a second initiator solution;
(2) respectively dissolving 0.1 part by weight of resin curing agent, 0.1 part by weight of stabilizer, 0.5 part by weight of water reducing agent and 0.03 part by weight of air entraining agent in 20-25 parts by weight of water at normal temperature to respectively prepare a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution;
(3) adding 0.2 part by weight of olefin monomer and 1.8 parts by weight of epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature and stirring at 70-90 ℃ for 5-6 hours, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
(4) adding 2 parts by weight of foaming agent into 10-15 parts by weight of water to obtain foaming diluent, and then sending the foaming diluent into a foaming machine to prepare foam;
(5) adding 100 parts by weight of cement, 15 parts by weight of fine aggregate, 10 parts by weight of coarse aggregate and 5 parts by weight of active micro aggregate into 30-40 parts by weight of water, and uniformly stirring in a stirrer to obtain slurry;
(6) adding the rubber modified epoxy vinyl ester resin obtained in the step (3), 1 part by weight of epoxy resin, 1 part by weight of styrene and 1 part by weight of surfactant into the slurry obtained in the step (5), and uniformly stirring to obtain a gelled slurry;
(7) and (3) adding the foam obtained in the step (4), 5 parts by weight of fiber, a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution into the gelled slurry obtained in the step (6), and uniformly stirring in a stirrer to obtain the foamed concrete.
Comparative example 7
The common foamed concrete with the increased cement consumption: the procedure and the amount were the same as those of comparative example 4 except that the cement amount was 140 parts by weight.
Preparation example 5
The preparation method of the gel foaming concrete comprises the following steps:
(1) dissolving 0.03 weight part of a second initiator in 20-25 weight parts of water at normal temperature to obtain a second initiator solution;
(2) respectively dissolving 0.1 part by weight of resin curing agent, 0.1 part by weight of stabilizer, 0.5 part by weight of water reducing agent and 0.03 part by weight of air entraining agent in 20-25 parts by weight of water at normal temperature to respectively prepare a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution;
(3) adding 0.2 part by weight of olefin monomer and 1.8 parts by weight of epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature and stirring at 70-90 ℃ for 5-6 hours, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
(4) adding 2 parts by weight of foaming agent into 10-15 parts by weight of water to obtain foaming diluent, and then sending the foaming diluent into a foaming machine to prepare foam;
(5) adding 100 parts by weight of cement, 15 parts by weight of fine aggregate, 10 parts by weight of coarse aggregate and 5 parts by weight of active micro aggregate into 30-40 parts by weight of water, and uniformly stirring in a stirrer to obtain slurry;
(6) dissolving 3 parts by weight of diethanol monopropylene glycol amine and 5 parts by weight of dibutyl sulfate in 25-30 parts by weight of water at normal temperature, and uniformly stirring to obtain the accelerator solution;
(7) adding the rubber modified epoxy vinyl ester resin obtained in the step (3), 1 part by weight of epoxy resin, 1 part by weight of surfactant, 1 part by weight of styrene and the accelerator solution obtained in the step (6) into the slurry obtained in the step (5), and uniformly stirring to obtain gelled slurry;
(8) and (3) adding the foam obtained in the step (4), 5 parts by weight of fiber, a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution into the gelled slurry obtained in the step (7), and uniformly stirring in a stirrer to obtain the gelled foamed concrete.
The compressive strengths of the foamed concretes of comparative examples 4 to 7 and preparation example 5 were measured according to the methods described in GB/T50081-2002 and GB 50010-2010.
The compressive strengths of the foamed concretes of comparative examples 4 to 7 and preparation example 5 were measured after one year again in accordance with the methods described in GB/T50081-2002 and GB50010-2010, and the compressive strength after 1 year was divided by the initial compressive strength to obtain a durability coefficient, and the durability of the foamed concretes of comparative examples 4 to 7 and preparation example 5 was evaluated.
The method for detecting the flame retardant property of the foamed concrete comprises the following steps:
(1) the foamed concretes prepared in comparative examples 4 to 7 and preparation example 5 were cast into the same cubic shape, the size of the cube being 20cm by 5cm by 10 cm.
(2) A flame of 100 c was provided on one side of the cube concrete, the flame being 20cm from the cube concrete, and after 1 hour, the temperature of the opposite side of the cube concrete to the flame was measured.
The test data are shown in table 4.
TABLE 4 comparison of the overall Properties of the foamed concretes of comparative examples 4 to 7 and of preparation example 5
The results of Table 4 show that the compressive strength of the conventional foamed concrete of comparative example 4, which does not contain a resin and an accelerator, is the worst; compared with the prior art, the epoxy resin is added in the comparative example 5, so that the gelling property is improved, and the compressive strength of the foamed concrete is improved; comparative example 6 the rubber modified epoxy vinyl ester resin is added on the basis of comparative example 5, and the rubber modified epoxy vinyl ester resin has higher gelling property, so that the compressive strength of the foamed concrete of comparative example 6 is further improved; the preparation example 5 adds the accelerating agent on the basis of the comparative example 6, promotes the hydration of cement and other mineral substances, further improves the overall gelling property of the foamed concrete, and continuously improves the compressive strength of the foamed concrete; comparative example 7 does not contain resin and accelerator, but the cement amount is greatly increased, the compressive strength of the foamed concrete of comparative example 7 is enhanced, and a level equivalent to that of preparation example 5 is achieved. Therefore, the technical scheme of the invention can enable the foamed concrete to achieve ideal compressive strength on the basis of reducing the cement consumption.
Comparative example 4 has the worst durability, comparative example 5 has a greater improvement in durability than comparative example 4, and comparative example 6 has a durability comparable to comparative example 5; comparative example 7 contains no resin, but the cement content is increased and the corrosion resistance is enhanced as compared with comparative example 4, while the durability of comparative example 7 is still lower than that of preparation example 5. Therefore, the foamed concrete added with the epoxy resin has higher durability.
Comparative example 4 had the worst flame retardancy; the flame retardancy of comparative example 5 was at the same level as that of comparative example 4; the flame retardancy of comparative example 6 and preparation example 5 was at the same level and was greatly improved as compared with comparative examples 4, 5; comparative example 7 contains no resin, but the cement content is increased to enhance the flame retardancy as compared with comparative examples 4 and 5, while the flame retardancy of comparative example 7 is still lower than that of preparation example 5. Therefore, the foamed concrete added with the rubber modified epoxy vinyl ester resin has higher flame retardance.
2. The flame retardant properties of cementitious concrete prepared using different olefin monomers were compared.
The following olefin monomers are butadiene, isoprene and chloroprene, respectively.
Preparation example 6
The preparation method and the amount of the reagents used in this preparation example were the same as those in preparation example 5, except that the olefin monomer was butadiene.
Preparation example 7
This preparation example was carried out in the same manner as in preparation example 5 except that the olefin monomer was isoprene.
The flame retardant properties of the cementitious foamed concrete of preparation examples 5-7 were tested using the flame retardant property test method described above, with the test data shown in table 5.
TABLE 5 comparison of flame retardance of cementitious foamed concretes of preparation examples 5 to 7
The results in Table 5 show that the flame retardant properties of the cementitious foamed concrete of preparation 5 are stronger, and the flame retardant properties of preparation 6 and preparation 7 are at the same level and are much worse than those of preparation 5. It is seen that the flame retardancy of the resulting cementitious foamed concrete is best when the olefin monomer is chloroprene.
3. And (3) comparing the performances of the cementitious concrete with different rubber modified epoxy vinyl ester resin dosage.
Preparation example 8
The preparation method of the cementitious foamed concrete in the preparation example is as follows:
(1) dissolving 0.01 part by weight of a second initiator in 20-25 parts by weight of water at normal temperature to obtain a second initiator solution;
(2) respectively dissolving 0.3 weight part of resin curing agent, 0.2 weight part of stabilizer, 0.8 weight part of water reducing agent and 0.01 weight part of air entraining agent in 20-25 weight parts of water at normal temperature to respectively prepare a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution;
(3) adding 0.05 weight part of olefin monomer and 0.95 weight part of epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature and stirring for 5-6 hours at 70-90 ℃, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
(4) adding 3 parts by weight of foaming agent into 10-15 parts by weight of water to obtain foaming diluent, and then sending the foaming diluent into a foaming machine to prepare foam;
(5) adding 100 parts by weight of cement, 15 parts by weight of fine aggregate, 10 parts by weight of coarse aggregate and 5 parts by weight of active micro aggregate into 30-40 parts by weight of water, and uniformly stirring in a stirrer to obtain slurry;
(6) at normal temperature, dissolving 1 part by weight of diethanol monopropylene glycol amine and 3 parts by weight of dibutyl sulfate in 25-30 parts by weight of water, and uniformly stirring to obtain the accelerator solution;
(7) adding the rubber modified epoxy vinyl ester resin obtained in the step (3), 0.5 part by weight of epoxy resin, 1 part by weight of surfactant, 0.5 part by weight of styrene and the accelerator solution obtained in the step (6) into the slurry obtained in the step (5), and uniformly stirring to obtain gelled slurry;
(8) and (3) adding the foam obtained in the step (4), 5 parts by weight of fiber, a resin curing agent solution, a stabilizer solution, a water reducing agent solution and an air entraining agent solution into the gelled slurry obtained in the step (7), and uniformly stirring in a stirrer to obtain the cementitious foamed concrete.
Preparation example 9
Steps (1) to (2) of this preparation are the same as Steps (1) to (2) of preparation 5;
(3) adding 0.08 weight part of olefin monomer and 1.92 weight parts of epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature and stirring for 5-6 hours at 70-90 ℃, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
steps (4) to (8) are the same as steps (4) to (8) of preparation example 5.
Preparation example 10
Steps (1) to (2) of this preparation are the same as Steps (1) to (2) of preparation 5;
(3) adding 0.1 part by weight of olefin monomer and 2.9 parts by weight of epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature and stirring at 70-90 ℃ for 5-6 hours, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
steps (4) to (8) are the same as steps (4) to (8) of preparation example 5.
Preparation example 11
Steps (1) to (2) of this preparation are the same as Steps (1) to (2) of preparation 5;
(3) adding 0.3 part by weight of olefin monomer and 3.7 parts by weight of epoxy vinyl ester resin into the second initiator solution, uniformly stirring, feeding into a reaction kettle, introducing nitrogen, keeping the temperature and stirring at 70-90 ℃ for 5-6 hours, cooling and discharging to obtain the rubber modified epoxy vinyl ester resin;
steps (4) to (8) are the same as steps (4) to (8) of preparation example 5.
The compressive strengths of the gelled foamed concretes of preparation examples 8 to 11 were measured according to the methods described in GB/T50081-2002 and GB50010-2010, and the test data are shown in Table 6.
TABLE 6 compression Strength comparison of cementitious foamed concretes of preparation examples 8 to 11
The results in Table 6 show that the compressive strengths of preparation examples 8 to 10 gradually increased with increasing amounts of the olefin monomer and the epoxy vinyl ester resin, and particularly that the compressive strength of preparation example 10 reached 15.64KN/mm2In preparation example 11, the use amounts of the olefin monomer and the epoxy vinyl ester resin are increased continuously, and the compressive strength is not increased much and reaches 15.82KN/mm2. Therefore, the compressive strength of the gelled foamed concrete provided by the invention is higher, wherein the olefin monomer and the epoxy vinyl ester resin in preparation examples 10 and 11 are more suitable for use.
In conclusion, the cementitious foamed concrete provided by the invention has higher strength, corrosion resistance and flame retardance; the invention utilizes the resin and the accelerator to promote the hydration of related components of the foamed concrete, thereby achieving the purposes of reducing the dosage of cement and improving the compressive strength of the foamed concrete.
Building constructed by using the building construction method
1. Efficiency of on-site construction
Comparative example 8
(1) Preparing the cementitious foamed concrete described in preparation example 11;
(2) constructing a single-sided wall body by using the box plates, wherein the height of the wall body is 3 meters, the width of the wall body is 3 meters, and the thickness of the wall body is 30 centimeters;
(3) brushing waste oil such as waste engine oil on the inner surface of the box plate, and fixing support materials such as wood wedges outside the box plate;
(4) erecting steel bars inside the box plates;
(5) pouring the cementitious foaming concrete in the step (1) in the box plate and the reinforcing steel frame, and forming a building body after the foaming concrete is solidified;
(6) and dismantling the box plate outside the building body and plastering outside the building body.
Example 1
(1) Preparing the modular building insulation material of preparation example 1;
(2) preparing the cementitious foamed concrete described in preparation example 11;
(3) splicing the modular building heat-insulating material obtained in the step (1) into a single-sided wall body, wherein the height of the wall body is 3 meters, the width of the wall body is 3 meters, and the thickness of the wall body is 30 centimeters;
(4) erecting steel bars in the single-sided wall in the step (3);
(5) pouring the cementitious foaming concrete in the step (2) into the single-sided wall and the reinforcing steel frame in the step (3), and forming a building body after the foaming concrete is solidified;
(6) plastering outside the building body in the step (5).
In the on-site construction process, the construction time of comparative example 8 was 9 days, and the construction time of example 1 was 7 days. The modular building heat-insulating material in the embodiment 1 is directly assembled on a construction site, and the modules are spliced and meshed by concave and convex groove teeth, so that the time and the efficiency of the assembling process are saved; since the modular building insulation material has a proper wall shape, a part of the time for on-site measurement is saved. In the comparative example 8, the box plate and the steel bar building positions need to be accurately measured, time is reserved for building and fixing the box plate, and oil is brushed on the inner side of the box plate, so that the box plate is easy to disassemble in the later period; after the single-sided wall is formed and fixed, the box plate is also required to be dismantled, so that the field construction time is longer.
2. Comprehensive performance of building body
Comparative example 9
(1) Preparing the general foamed concrete described in comparative example 4;
(2) constructing a single-sided wall body by using the box plates, wherein the height of the wall body is 3 meters, the width of the wall body is 3 meters, and the thickness of the wall body is 30 centimeters;
(3) brushing waste oil such as waste engine oil on the inner surface of the box plate, and fixing support materials such as wood wedges outside the box plate;
(4) erecting steel bars in the box plates;
(5) pouring the common foamed concrete in the step (1) in the box plate and the reinforcing steel bar frame, and forming a building body after the foamed concrete is solidified;
(6) and dismantling the box plate outside the building body and plastering outside the building body.
Example 2
(1) Preparing the modular building insulation material of preparation example 4;
(2) preparing the cementitious foamed concrete described in preparation example 11;
(3) splicing the modular building heat-insulating material obtained in the step (1) into a single-sided wall body, wherein the height of the wall body is 3 meters, the width of the wall body is 3 meters, and the thickness of the wall body is 30 centimeters;
(4) erecting steel bars in the single-sided wall in the step (3);
(5) pouring the cementitious foaming concrete in the step (2) into the single-sided wall and the reinforcing steel frame in the step (3), and forming a building body after the foaming concrete is solidified;
(6) plastering outside the building body in the step (5).
Example 3
(1) Preparing the modular building insulation material of preparation example 1;
(2) preparing the cementitious foamed concrete described in preparation example 5;
(3) splicing the modular building heat-insulating material obtained in the step (1) into a single-sided wall body, wherein the height of the wall body is 3 meters, the width of the wall body is 3 meters, and the thickness of the wall body is 30 centimeters;
(4) erecting steel bars in the single-sided wall in the step (3);
(5) pouring the cementitious foaming concrete in the step (2) into the single-sided wall and the reinforcing steel frame in the step (3), and forming a building body after the foaming concrete is solidified;
(6) plastering outside the building body in the step (5).
Example 4
(1) Preparing the modular building insulation material of preparation example 1;
(2) preparing the cementitious foamed concrete described in preparation example 6;
(3) splicing the modular building heat-insulating material obtained in the step (1) into a single-sided wall body, wherein the height of the wall body is 3 meters, the width of the wall body is 3 meters, and the thickness of the wall body is 30 centimeters;
(4) erecting steel bars in the single-sided wall in the step (3);
(5) pouring the cementitious foaming concrete in the step (2) into the single-sided wall and the reinforcing steel frame in the step (3), and forming a building body after the foaming concrete is solidified;
(6) plastering outside the building body in the step (5).
The antibacterial properties of the constructions of comparative example 9 and examples 1-4 were examined according to the method described in GB/T31402-2015. The compressive strength of the building bodies of comparative example 9 and examples 1 to 4 was measured according to the methods described in GB/T50081-2002 and GB 50010-2010.
The method for detecting the flame retardant property of the building body comprises the following steps of; a flame of 100 c was supplied to one side of the building body in comparative example 9 and examples 1 to 4, respectively, and the flame was spaced apart from the building body by 20cm, and after 1 hour, the temperature of the opposite side of the flame of the building body was measured.
TABLE 7 comparison of the overall Properties of the building bodies of comparative example 9 and examples 1 to 4
The results in table 7 show that, in terms of antibacterial performance, the antibacterial performance of comparative example 9 is poor, while comparative example 9 only uses common foamed concrete and does not use a modular building insulation material, while examples 1, 3 and 4 use a modular building insulation material modified by an antibacterial agent DMAE-BC, so that the antibacterial performance is greatly improved, and example 2 uses a modular building insulation material modified by an antibacterial agent MDPB, so that the antibacterial performance is greatly improved compared with that of comparative example 9 and is slightly inferior to that of examples 1, 3 and 4; in terms of compressive strength, comparative example 9 was inferior in compressive strength, cementitious concretes were used in examples 1 and 2, and the rubber-modified epoxy vinyl ester resin therein was used in a large amount, so that the compressive strength was the highest in examples 1 and 2, and cementitious concretes were also used in examples 3 and 4, and the rubber-modified epoxy vinyl ester resin therein was used in a small amount, so that the compressive strength of examples 3 and 4 was smaller than that of examples 1 and 2; in terms of flame retardancy, comparative example 9 has poor flame retardancy, examples 1, 2 and 3 use rubber modified epoxy vinyl ester resin in which chloroprene is used as olefin monomer of rubber raw material, and thus flame retardancy of examples 1, 2 and 3 is the best, and example 4 uses rubber modified epoxy vinyl ester resin in which butadiene is used as olefin monomer of rubber raw material, and flame retardancy of butadiene is inferior to that of chloroprene, and thus flame retardancy of example 4 is lower than that of examples 1, 2 and 3.
In conclusion, the building construction method provided by the invention can obviously shorten the site construction time, simplify the construction procedure and improve the construction efficiency; in addition, the antibacterial property, the compressive strength and the flame retardance of the building body built by the building construction method are obviously improved, and the comprehensive performance of the building body can be improved by the building construction method provided by the invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims (11)

1. A method of building construction, the method comprising: (1) preparing a polystyrene modular building thermal insulation material; (2) preparing cementitious foamed concrete; (3) pouring cementitious foaming concrete in the molded polystyrene modular building heat-insulating material to form a building body;
the preparation method of the modular building thermal insulation material comprises the following steps: (1) the antibacterial agent and styrene are subjected to polymerization reaction under the action of a first initiator and an auxiliary agent to prepare antibacterial modified polystyrene; (2) styrene is subjected to polymerization reaction under the action of a first initiator and an auxiliary agent to prepare polystyrene; (3) and blending, foaming and molding the antibacterial modified polystyrene, the polypropylene fiber and the polystyrene to prepare the modular building thermal insulation material.
2. The method of building construction of claim 1, wherein the method of building construction comprises the steps of:
(1) preparing the modular building insulation material;
(2) preparing the cementitious foamed concrete;
(3) splicing the modular building heat-insulating material obtained in the step (1) into a building skeleton according to building requirements;
(4) erecting steel bars in the building skeleton in the step (3);
(5) pouring the cementitious foaming concrete in the step (2) into the building skeleton and the reinforcing steel frame, and forming a building after the foaming concrete is solidified;
(6) plastering outside the building body.
3. The method of building construction of claim 2, wherein the modular building insulation comprises antimicrobial modified polystyrene, polypropylene fiber, and an adjuvant; the raw materials for preparing the antibacterial modified polystyrene contain an antibacterial agent and styrene.
4. The method of construction according to claim 3 wherein the antimicrobial agent is a compound having a group polymerizable with styrene.
5. The method of construction according to claim 4, wherein the antibacterial agent is a quaternary ammonium compound having a carbon-carbon double bond.
6. The method of construction according to claim 4, wherein the antimicrobial agent is methacryloyloxyethyl-benzyl-dimethyl ammonium chloride.
7. The method for building construction according to any one of claims 1-2, wherein the method for preparing the cementitious foamed concrete comprises: 1) the preparation raw material of the rubber and the epoxy vinyl ester resin are subjected to polymerization reaction under the action of a second initiator to prepare rubber modified epoxy vinyl ester resin; 2) preparing an accelerator; 3) preparing foam and gel slurry; 4) and stirring and mixing the foam, the gelled slurry and the auxiliary agent to prepare the gelled foamed concrete.
8. The method for building construction according to claim 7, wherein the cementitious foamed concrete contains resin, cement, fine aggregate, coarse aggregate, reactive micro aggregate and auxiliaries, the resin contains modified unsaturated polyester resin, the modified unsaturated polyester resin is rubber modified unsaturated polyester resin, and the rubber modified unsaturated polyester resin is rubber modified epoxy vinyl ester resin.
9. The method according to claim 8, wherein the epoxy vinyl ester resin is bisphenol A epoxy vinyl resin, the raw material for preparing the rubber comprises an olefin monomer and a second initiator, and the olefin monomer is an organic compound having carbon-carbon double bonds as two terminal groups.
10. The method of construction according to claim 9 wherein the olefinic monomer is selected from butadiene, isoprene and chloroprene.
11. The method according to claim 8, wherein the accelerator comprises an alcohol amine compound and a sulfate compound, the alcohol amine compound is diethylene glycol monopropylene glycol amine, and the sulfate compound is dibutyl sulfate.
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