CN110981372A - High-performance heat-preservation plastering mortar prepared from industrial solid wastes and preparation method thereof - Google Patents
High-performance heat-preservation plastering mortar prepared from industrial solid wastes and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a high-performance heat-preservation plastering mortar prepared by utilizing industrial solid wastes and a preparation method thereof, wherein the preparation method comprises the following components: industrial solid wastes, cement, natural sand, expanded perlite, anti-crack fibers, dispersion sol, cellulose ether and an additive; the industrial solid waste is any of molybdenum tailing sand, steel slag sand, phosphogypsum, red mud, slag and fly ash; the dispersion sol component comprises diatomite, ethylene-vinyl acetate copolymer, methyl methacrylate, titanate coupling agent and cumene hydroperoxide; the cellulose ether is hydroxypropyl methyl cellulose ether, and the additive is water glass, starch ether and polycarboxylic acid high-efficiency water reducing agent. The plastering mortar prepared by the invention is suitable for an external thermal insulation system of an expanded polystyrene board external wall. The invention not only can consume a large amount of industrial solid wastes which are harmful to the environment and reduce the pressure of environmental self-repair, but also the prepared mortar has good mechanical property, durability and heat preservation capability.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to high-performance heat-insulation plastering mortar prepared by utilizing industrial solid wastes and a preparation method of the high-performance heat-insulation plastering mortar.
Background
The building plastering mortar is divided into common plastering mortar and special plastering mortar, wherein the common plastering mortar is the plastering mortar with the largest use amount in building engineering, has the functions of mainly protecting a wall from being damaged by external severe environment, improving the moisture-proof, corrosion-resistant and weathering-resistant performances, enhancing the durability of a wall material, and simultaneously keeping the building wall surface flat, clean and beautiful; the special plastering mortar comprises waterproof plastering mortar, heat-preservation plastering mortar, heat-insulation plastering mortar, corrosion-resistant plastering mortar and the like. The heat-insulating plastering mortar is prepared by mixing cementing materials such as cement, lime, fly ash, gypsum and the like with light porous aggregates such as expanded perlite or expanded vermiculite and the like according to a certain proportion, has the properties of light weight, heat insulation, sound absorption and the like, has low heat conductivity coefficient which is generally 0.07-0.10W/(m.K), and can be used in a wall surface heat-insulating system, such as: an external thermal insulation system for an expanded polystyrene board external wall.
The external thermal insulation system of the expanded polystyrene board external wall is composed of an expanded polystyrene board, an adhesive, an anchor bolt, thermal insulation plastering mortar, alkali-resistant mesh cloth, coating and the like, is arranged on the outermost layer of a building, directly bears various adverse effects of an external environment, and the quality of the thermal insulation plastering mortar directly influences the service effect and the service life of the whole thermal insulation system. The common thermal insulation plastering mortar has low cohesive force and large shrinkage rate, which causes construction difficulty, and the common thermal insulation plastering mortar has large elastic modulus, is easy to crack in the using process, and has greatly influenced mechanical property and durability.
Aiming at the problems of low bonding force, large shrinkage and easy cracking of common thermal insulation plastering mortar, the current adopted means mainly comprise: (1) in the patent of environmental protection anti-cracking high weather resistance external heat preservation plastering mortar and preparation method thereof (application number: CN201910423952.7), high flying et al strongly improve the binding power of the mortar, improve the physical structure of the hydrated cement gasification product in the mortar, relieve the internal stress and reduce the generation of mortar cracks by adding the binding agents such as styrene resin, styrene-butadiene copolymer, epoxy resin and the like into the mortar, but the organic binding agent is easy to decompose when meeting high temperature, thereby losing the effect and the mortar is easy to generate a large amount of cracks; (2) adding fibers into mortar, in the patent of anti-cracking heat-insulating plastering mortar (application number: CN201810372764.1), the Huangming et al, by adding modified fibers into the mortar, can enhance the binding force among all substances in the mortar and inhibit the cracking of the mortar, but because the fibers are difficult to uniformly disperse in the mortar, and when the breaking strength of the fibers is reached, the mortar can still crack; (3) in the patent of lightweight plastering gypsum mortar and a preparation method thereof (application number: CN201910455437.7), cinnabar et al add desulfurized gypsum or natural gypsum into the mortar to make the mortar have micro-expansibility after solidification, thereby effectively solving the problem of cracking caused by large drying shrinkage of the mortar, but the addition of the gypsum can cause the increase of calcium hydroxide in the mortar and adverse effect on the mechanical property of the mortar. Therefore, the development of a novel high-performance thermal insulation plastering mortar is an urgent need for adapting to the increasing diversification of the current construction.
Disclosure of Invention
Aiming at the defects of the prior art, the invention mainly aims to provide high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes and a preparation method thereof, and aims to solve the technical problems that the industrial solid wastes are applied to cement mortar to the maximum extent, a certain amount of water glass is added to stimulate the potential activity of slag, red mud and fly ash to generate zeolite-like geopolymeric hydration products, micro-expansion sulphoaluminate cement with certain components is added into the cement mortar, and proper dispersion sol is added to improve the dispersibility of fibers in the cement mortar, so that the problems of large shrinkage rate and easy cracking of the common thermal insulation plastering mortar are effectively solved, and the prepared mortar has good mechanical property, durability and thermal insulation capability.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-performance heat-preservation plastering mortar prepared from industrial solid wastes is characterized by comprising the following components in parts by weight: 20-50 parts of industrial solid waste, 30-65 parts of cement, 5-30 parts of natural sand, 10-15 parts of expanded perlite, 1-5 parts of anti-crack fiber, 3-6 parts of dispersion sol, 5-7 parts of cellulose ether and 4-6 parts of additive; the industrial solid waste comprises any of molybdenum tailing sand, steel slag sand, phosphogypsum, red mud, slag and fly ash, wherein the industrial solid waste at least comprises one of the molybdenum tailing sand and the steel slag sand and one of the red mud, the slag and the fly ash.
In a specific embodiment of the invention, the screened particle size of the molybdenum tailing sand and the steel slag sand is 0.1-0.5 mm; the residue on sieve with the fineness of 0.08mm of the phosphogypsum is less than or equal to 3.5 percent, and CaSO in the phosphogypsum4The content is 62.3%; the red mud is sintered for 2 to 5 hours at the temperature of 500-600 ℃, and the particle size of the red mud is screened to be 0.1 to 0.2 mm; the slag is S95-grade slag micro powder; the fly ash is II-grade fly ash.
In a specific embodiment of the invention, the cement comprises the following components in parts by weight: 90-95 parts of ordinary Portland cement with the strength grade of 42.5 and 5-10 parts of micro-expansion sulphoaluminate cement.
In a specific embodiment of the invention, the natural sand has a particle size of 0.1-0.5 mm.
In one specific embodiment of the invention, the expanded perlite has a thermal conductivity of less than 0.064W/m.k and a particle size of 0.1-0.5 mm.
In a specific embodiment of the invention, the anti-crack fibers are alkali-resistant glass fibers, the diameter of the anti-crack fibers is 3-6 mu m, and the length of the anti-crack fibers is 2-4 mm.
In a specific embodiment of the invention, the cellulose ether is hydroxypropyl methylcellulose ether.
In a specific embodiment of the invention, the admixture is water glass, starch ether and polycarboxylic acid high-efficiency water reducing agent, wherein the modulus of the water glass is 1.0-2.0.
In a specific embodiment of the present invention, the dispersion sol comprises the following components in parts by weight: 10-20 parts of diatomite, 10-15 parts of ethylene-vinyl acetate copolymer, 40-60 parts of methyl methacrylate, 3-8 parts of titanate coupling agent and 0.2-0.5 part of cumene hydroperoxide.
On the other hand, the invention also provides a preparation method of the high-performance heat-insulation plastering mortar, which is characterized by comprising the following steps: uniformly mixing the crack-resistant fibers, the cellulose ether and the additive in the heated dispersion sol, cooling to room temperature after uniformly stirring, adding the industrial solid waste, the cement, the natural sand, the expanded perlite and the water, and uniformly stirring to obtain the high-performance thermal-insulation plastering mortar.
In a specific embodiment of the invention, the high-performance thermal insulation plastering mortar has a compression-fracture ratio of 1.5-2.5, a working time of 2.0-2.5 h, a tensile bond strength with the expanded polystyrene board of 0.12-0.15MPa, a tensile bond strength with the expanded polystyrene board of 0.11-0.14MPa after an impermeability test, a tensile bond strength with the expanded polystyrene board of 0.12-0.14MPa after a freeze-thaw test, and a 28d thermal conductivity of 0.04-0.10W/m.k.
Compared with the prior art, the invention has the beneficial effects that:
1) molybdenum tailings sand, steel slag sand, phosphogypsum, red mud, slag, fly ash and the like belong to a large amount of solid wastes in the industrial production process, and the large amount of stacking not only occupies a large amount of land, but also causes serious environmental pollution and damage. Meanwhile, according to the notice of the relevant national policies, the treatment work of industrial solid wastes such as red mud, steel smelting slag, tailings, industrial byproduct gypsum and the like is mainly developed, and the green development of the industry is actively promoted. Therefore, according to the resource characteristics of industrial solid wastes such as molybdenum tailing sand, steel slag sand, phosphogypsum, red mud, slag, fly ash and the like, the molybdenum tailing sand is used in cement mortar, and the molybdenum tailing sand is also an urgent requirement for adapting to the green development of the current industry. The molybdenum tailing sand and the steel slag sand are used for partially or completely replacing natural sand, so that a large amount of industrial solid waste can be utilized, and the resource utilization rate is improved; the phosphogypsum can be used as a cement admixture to improve the bonding force of mortar, and can also generate micro-expansion to solve the problem of shrinkage and cracking of the mortar; the slag, the red mud and the fly ash are used as cement admixture, and simultaneously can generate zeolite-like geopolymeric hydration products under the excitation of water glass, thereby improving the mechanical property and the durability of cement mortar.
2) The slightly-expanded sulphoaluminate cement with a certain component is added into the cement mortar, and can be hydrated to generate ettringite in the process of adding water into the cement mortar for mixing, so that the volume of the cement mortar is slightly expanded, the shrinkage of the mortar is compensated, and the cracking is effectively prevented.
3) The proper dispersion sol is added, so that the problem of uneven dispersion of the fibers in the cement mortar can be effectively solved, the function of anti-cracking fibers is greatly exerted, and the cracking of the cement mortar is prevented.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. The examples are carried out on the premise of the technical scheme of the invention, and are not intended to limit the implementation mode of the invention. The following examples are given to illustrate the preferred embodiments of the present invention, and all obvious variations and modifications are within the scope of the present invention.
Example 1
A high-performance heat-insulation plastering mortar prepared from industrial solid wastes comprises the following components in parts by weight: 10 parts of molybdenum tailing sand, 3 parts of phosphogypsum, 3 parts of red mud produced by a sintering method, 2 parts of S95-grade slag, 2 parts of II-grade fly ash, 38 parts of common Portland cement with the strength grade of 42.5, 2 parts of micro-expansion sulphoaluminate cement, 10 parts of natural sand, 10 parts of expanded perlite, 5 parts of alkali-resistant glass fiber, 5 parts of dispersion sol (wherein 18 parts of diatomite, 15 parts of ethylene-vinyl acetate copolymer, 60 parts of methyl methacrylate, 6.5 parts of titanate coupling agent and 0.5 part of cumene hydroperoxide), 5 parts of hydroxypropyl methyl cellulose ether, 2 parts of water glass, 2 parts of starch ether and 1 part of polycarboxylic acid high-efficiency water reducing agent; the particle size of the molybdenum tailing sand is 0.3 mm; the grain size of the steel slag sand is 0.5mm, and the fineness of the phosphogypsum (0.08mm screen residue) is 2.5 percent; the grain size of the sintering method red mud is 0.1 mm; the particle size of the natural sand is 0.2 mm; the particle size of the expanded perlite is 0.2 mm; the diameter of the alkali-resistant glass fiber is 5 μm, and the length is 2 mm; the modulus of water glass is 1.5.
The preparation method of the high-performance heat-insulation plastering mortar prepared from the industrial solid wastes comprises the following steps: uniformly mixing 5 parts of alkali-resistant glass fiber, 5 parts of hydroxypropyl methyl cellulose ether, 2 parts of water glass, 2 parts of starch ether and 1 part of polycarboxylic acid type high-efficiency water reducing agent in heated dispersion sol, cooling to room temperature after uniformly stirring, adding 10 parts of molybdenum tailing sand, 3 parts of phosphogypsum, 3 parts of red mud of a sintering method, 2 parts of S95-grade slag, 2 parts of II-grade fly ash, 38 parts of ordinary portland cement with the strength grade of 42.5, 2 parts of micro-expansion sulphoaluminate cement, 10 parts of natural sand, 10 parts of expanded perlite and 1 time deionized water by weight, and uniformly stirring to prepare the high-performance heat-insulation plastering mortar.
Example 2
A high-performance heat-insulation plastering mortar prepared from industrial solid wastes comprises the following components in parts by weight: 15 parts of molybdenum tailing sand, 2 parts of phosphogypsum, 2 parts of red mud produced by a sintering method, 6 parts of S95-grade slag, 5 parts of II-grade fly ash, 30 parts of common Portland cement with the strength grade of 42.5, 1 part of micro-expansion sulphoaluminate cement, 6 parts of natural sand, 13 parts of expanded perlite, 4 parts of alkali-resistant glass fiber, 6 parts of dispersion sol (wherein 20 parts of diatomite, 14 parts of ethylene-vinyl acetate copolymer, 58 parts of methyl methacrylate, 7.6 parts of titanate coupling agent and 0.4 part of cumene hydroperoxide), 6 parts of hydroxypropyl methyl cellulose ether, 1 part of water glass, 1 part of starch ether and 2 parts of polycarboxylic acid high-efficiency water reducing agent; the particle size of the molybdenum tailing sand is 0.2 mm; the grain size of the steel slag sand is 0.4mm, and the fineness of the phosphogypsum (0.08mm screen residue) is 1.5 percent; the grain size of the sintering process red mud is 0.2 mm; the particle size of the natural sand is 0.1 mm; the particle size of the expanded perlite is 0.5 mm; the diameter of the alkali-resistant glass fiber is 4 μm, and the length of the alkali-resistant glass fiber is 3 mm; the modulus of water glass is 1.2.
The preparation method of the high-performance heat-insulation plastering mortar prepared from the industrial solid wastes comprises the following steps: uniformly mixing 4 parts of alkali-resistant glass fiber, 6 parts of hydroxypropyl methyl cellulose ether, 1 part of water glass, 1 part of starch ether and 2 parts of polycarboxylic acid type high-efficiency water reducing agent in heated dispersion sol, cooling to room temperature after uniformly stirring, adding 15 parts of molybdenum tailing sand, 2 parts of phosphogypsum, 2 parts of red mud of a sintering method, 6 parts of S95-grade slag, 5 parts of II-grade fly ash, 30 parts of common silicate cement with the strength grade of 42.5, 1 part of micro-expansion sulphoaluminate cement, 6 parts of natural sand, 13 parts of expansion perlite and 1 time deionized water by weight, and uniformly stirring to prepare the high-performance heat-insulation plastering mortar.
Example 3
A high-performance heat-insulation plastering mortar prepared from industrial solid wastes comprises the following components in parts by weight: 20 parts of steel slag sand, 6 parts of phosphogypsum, 5 parts of S95-grade slag, 9 parts of II-grade fly ash, 29 parts of common Portland cement with the strength grade of 42.5, 1 part of micro-expansion sulphoaluminate cement, 5 parts of natural sand, 10 parts of expanded perlite, 1 part of alkali-resistant glass fiber, 3 parts of dispersion sol (wherein 17 parts of diatomite, 15 parts of ethylene-vinyl acetate copolymer, 60 parts of methyl methacrylate, 7.6 parts of titanate coupling agent, 0.4 part of cumene hydroperoxide), 5 parts of hydroxypropyl methyl cellulose ether, 2 parts of water glass, 1 part of starch ether and 3 parts of polycarboxylic acid high-efficiency water reducing agent; the particle size of the molybdenum tailing sand is 0.5 mm; the grain size of the steel slag sand is 0.3mm, and the fineness of the phosphogypsum (0.08mm screen residue) is 2.0 percent; the grain size of the sintering process red mud is 0.5 mm; the particle size of the natural sand is 0.2 mm; the particle size of the expanded perlite is 0.3 mm; the diameter of the alkali-resistant glass fiber is 3 mu m, and the length of the alkali-resistant glass fiber is 4 mm; the modulus of water glass is 2.0.
The preparation method of the high-performance heat-insulation plastering mortar prepared from the industrial solid wastes comprises the following steps: uniformly mixing 1 part of alkali-resistant glass fiber, 5 parts of hydroxypropyl methyl cellulose ether, 2 parts of water glass, 1 part of starch ether and 3 parts of polycarboxylic acid high-efficiency water reducing agent in heated dispersion sol, cooling to room temperature after uniformly stirring, adding 20 parts of steel slag sand, 6 parts of phosphogypsum, 5 parts of S95-grade slag, 9 parts of II-grade fly ash, 29 parts of common silicate cement with the strength grade of 42.5, 1 part of micro-expansion sulphoaluminate cement, 5 parts of natural sand, 10 parts of expansion perlite and 1 time of deionized water by weight, and uniformly stirring to prepare the high-performance heat-preservation plastering mortar.
Comparative example
The common heat-insulation plastering mortar comprises the following components in parts by weight: 50 parts of ordinary portland cement with the strength grade of 42.5, 5 parts of phosphogypsum, 25 parts of natural sand, 10 parts of expanded perlite, 3 parts of alkali-resistant glass fiber, 2 parts of redispersible sol powder, 2 parts of hydroxypropyl methyl cellulose ether, 1 part of starch ether and 2 parts of polycarboxylic acid high-efficiency water reducing agent; the fineness of the phosphogypsum (0.08mm of screen residue) is 3.0 percent; the particle size of the natural sand is 0.5 mm; the particle size of the expanded perlite is 0.2 mm; the alkali-resistant glass fibers had a diameter of 4 μm and a length of 5 mm.
The preparation method of the heat-insulation plastering mortar comprises the following steps: 50 parts of ordinary Portland cement with the strength grade of 42.5, 5 parts of phosphogypsum, 25 parts of natural sand, 10 parts of expanded perlite, 3 parts of alkali-resistant glass fiber, 2 parts of redispersible sol powder, 2 parts of hydroxypropyl methyl cellulose ether, 1 part of starch ether, 2 parts of polycarboxylic acid high-efficiency water reducer and 1 time of deionized water are mixed and stirred uniformly to prepare the ordinary thermal-insulation plastering mortar.
Example of effects:
experimental samples: the high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes in the embodiments 1 to 3 of the invention and the common thermal insulation plastering mortar prepared by the comparative example.
The experimental method comprises the following steps: the mechanical property, durability and heat-insulating capability of the experimental sample are detected according to the standard JG 149-2003 'expanded polystyrene board thin-plastered external wall heat-insulating system', and the test results are shown in Table 1:
TABLE 1
The experimental results are as follows:
as can be seen from Table 1, the high performance thermal mortar prepared in example 1 of the present invention has a compression-fracture ratio of 2.1, a working time of 2.3h, a tensile bond strength with expanded polystyrene board of 0.15MPa, a tensile bond strength with expanded polystyrene board of 0.14MPa after anti-permeability test, a tensile bond strength with expanded polystyrene board of 0.13MPa after freeze-thaw test, and a 28d thermal conductivity of 0.08W/m.k.
The high-performance thermal insulation plastering mortar prepared in the embodiment 2 has the compression-fracture ratio of 1.9, the operable time of 2.1h, the tensile bonding strength with the expanded polystyrene board of 0.14MPa, the tensile bonding strength with the expanded polystyrene board of 0.13MPa after an anti-permeability test, the tensile bonding strength with the expanded polystyrene board of 0.13MPa after a freeze-thaw test and the 28d thermal conductivity of 0.06W/m.k.
The high-performance thermal insulation plastering mortar prepared in the embodiment 3 has a compression-fracture ratio of 2.3, an operable time of 2.5h, tensile bonding strength with the expanded polystyrene board of 0.14MPa after an anti-permeability test, tensile bonding strength with the expanded polystyrene board of 0.13MPa after a freeze-thaw test, and a 28d thermal conductivity of 0.05W/m.k.
The compression-fracture ratio of the common thermal insulation plastering mortar prepared in the comparative example is 3.2, the operable time is 3.8h, the tensile bonding strength with the expanded polystyrene board is 0.10MPa, the tensile bonding strength with the expanded polystyrene board after an anti-permeability test is 0.09MPa, the tensile bonding strength with the expanded polystyrene board after a freeze-thaw test is 0.08MPa, and the 28d thermal conductivity coefficient is 0.13W/m.k.
Experimental results show that all technical indexes of the high-performance heat-insulation plastering mortar prepared in the embodiments 1 to 3 meet the requirements of the existing national relevant standards, the bonding strength and the crack resistance of the mortar are greatly improved, a formed plastering layer has good durability and heat-insulation capability, and the service life of an external heat-insulation system of an external wall can be prolonged.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. A high-performance heat-preservation plastering mortar prepared from industrial solid wastes is characterized by comprising the following components in parts by weight: 20-50 parts of industrial solid waste, 30-65 parts of cement, 5-30 parts of natural sand, 10-15 parts of expanded perlite, 1-5 parts of anti-crack fiber, 3-6 parts of dispersion sol, 5-7 parts of cellulose ether and 4-6 parts of additive; the industrial solid waste comprises any of molybdenum tailing sand, steel slag sand, phosphogypsum, red mud, slag and fly ash, wherein the industrial solid waste at least comprises one of the molybdenum tailing sand and the steel slag sand and one of the red mud, the slag and the fly ash.
2. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the particle size of the molybdenum tailing sand and the steel slag sand is 0.1-0.5 mm; the residue on sieve with the fineness of 0.08mm of the phosphogypsum is less than or equal to 3.5 percent, and CaSO in the phosphogypsum4The content is 62.3%; the red mud is sintered for 2 to 5 hours at the temperature of 500-600 ℃, and the particle size of the red mud is screened to be 0.1 to 0.2 mm; the slag is S95-grade slag micro powder; the fly ash is II-grade fly ash.
3. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the cement comprises the following components in parts by weight: 90-95 parts of ordinary Portland cement with the strength grade of 42.5 and 5-10 parts of micro-expansion sulphoaluminate cement.
4. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the particle size of the natural sand is 0.1-0.5 mm; the heat conductivity coefficient of the expanded perlite is less than 0.064W/m.k, and the particle size is 0.1-0.5 mm.
5. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the anti-crack fiber is alkali-resistant glass fiber, the diameter of the anti-crack fiber is 3-6 mu m, and the length of the anti-crack fiber is 2-4 mm.
6. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the cellulose ether is hydroxypropyl methyl cellulose ether.
7. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the additive is water glass, starch ether and a polycarboxylic acid high-efficiency water reducing agent, wherein the modulus of the water glass is 1.0-2.0.
8. The high-performance thermal insulation plastering mortar prepared by utilizing industrial solid wastes according to claim 1, is characterized in that: the dispersion sol comprises the following components in parts by weight: 10-20 parts of diatomite, 10-15 parts of ethylene-vinyl acetate copolymer, 40-60 parts of methyl methacrylate, 3-8 parts of titanate coupling agent and 0.2-0.5 part of cumene hydroperoxide.
9. The method for preparing the high-performance thermal insulation plastering mortar prepared by utilizing the industrial solid wastes according to any one of claims 1 to 8, is characterized by comprising the following steps: uniformly mixing the crack-resistant fibers, the cellulose ether and the additive in the heated dispersion sol, cooling to room temperature after uniformly stirring, adding the industrial solid waste, the cement, the natural sand, the expanded perlite and the water, and uniformly stirring to obtain the high-performance thermal-insulation plastering mortar.
10. The preparation method of the high-performance thermal insulation plastering mortar of claim 9, which is characterized by comprising the following steps: the high-performance heat-preservation plastering mortar has the compression-fracture ratio of 1.5-2.5, the operable time of 2.0-2.5 h, the tensile bonding strength with the expanded polystyrene board of 0.12-0.15MPa, the tensile bonding strength with the expanded polystyrene board of 0.11-0.14MPa after an impervious experiment, the tensile bonding strength with the expanded polystyrene board of 0.12-0.14MPa after a freeze-thaw experiment and the 28d thermal conductivity of 0.04-0.10W/m.k.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115466098A (en) * | 2022-09-29 | 2022-12-13 | 中建西部建设西南有限公司 | Environment-friendly high-crack-resistance plastering mortar and preparation method thereof |
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| CN111499205A (en) * | 2020-04-14 | 2020-08-07 | 江西鼎盛新材料科技有限公司 | Microcrystalline foam heat-insulation and decoration integrated board sintered by lepidolite tailings at one time |
| CN111499205B (en) * | 2020-04-14 | 2022-05-17 | 江西鼎盛新材料科技有限公司 | Microcrystalline foam heat-insulation and decoration integrated board sintered by lepidolite tailings at one time |
| CN111777394A (en) * | 2020-07-10 | 2020-10-16 | 江苏建鸿环保材料科技有限公司 | Gypsum-based self-healing high-strength wall material and preparation method thereof |
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| CN113979709A (en) * | 2021-12-10 | 2022-01-28 | 石家庄正旭环保建材有限公司 | Green energy-saving low-carbon environment-friendly T-series innovative multifunctional viscous-resistant adhesive cement and preparation method thereof |
| CN115304324A (en) * | 2022-07-22 | 2022-11-08 | 中筑信云发展有限公司 | Preparation method of dry-mixed mortar |
| CN115466098A (en) * | 2022-09-29 | 2022-12-13 | 中建西部建设西南有限公司 | Environment-friendly high-crack-resistance plastering mortar and preparation method thereof |
| CN115466098B (en) * | 2022-09-29 | 2023-06-20 | 中建西部建设西南有限公司 | Environment-friendly high-crack-resistance plastering mortar and preparation method thereof |
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