CN116120021A - Rapidly-cured road base material and preparation process thereof - Google Patents

Rapidly-cured road base material and preparation process thereof Download PDF

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Publication number
CN116120021A
CN116120021A CN202211628259.1A CN202211628259A CN116120021A CN 116120021 A CN116120021 A CN 116120021A CN 202211628259 A CN202211628259 A CN 202211628259A CN 116120021 A CN116120021 A CN 116120021A
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parts
base material
phosphogypsum
cement
road base
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Inventor
徐志
李作斌
陈诚
翟申平
陈孝刚
杨翔
肖昶
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Hubei Jiuxia Environmental Protection Technology Co ltd
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Hubei Jiuxia Environmental Protection Technology Co ltd
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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
    • C04B28/14—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 calcium sulfate cements
    • C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2688—Copolymers containing at least three different monomers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F261/00—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00
    • C08F261/02—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols
    • C08F261/04—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • 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
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/15—Heterocyclic compounds having oxygen in the ring
    • C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
    • C08K5/1515—Three-membered rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a rapid-curing road base material, which comprises the following components in parts by mass: the preparation method comprises the following steps of: 70-90 parts of phosphogypsum, 10-20 parts of cement, 0.15-4.5 parts of curing agent, 0.14-1.8 parts of functional resin and 1-5 parts of auxiliary agent. In addition, a preparation method of the road base material is also disclosed. The road base material has high tensile strength, is not easy to crack, has higher strength and road bearing capacity, and improves the service life and stability of the road.

Description

Rapidly-cured road base material and preparation process thereof
Technical Field
The invention relates to a road base material, in particular to a rapidly-cured road base material and a preparation process thereof.
Background
Phosphogypsum is a solid waste produced in the wet-process phosphoric acid process, contains substances such as phosphoric acid, calcium sulfate, fluoride and the like, has complex composition, produces a large amount of phosphogypsum every year, has an effective utilization rate of less than 10%, and is randomly piled up, so that not only is the waste of land resources caused, but also the existence of fluorine, phosphorus and other organic matters in the phosphogypsum can destroy the ecological environment and pollute the groundwater, the phosphogypsum can pollute the atmosphere and the air, dust produced by the phosphogypsum is scattered in the air and pollutes the air, and sulfur dioxide and other substances harmful to the bodies and lives of people can be produced under certain conditions, and the effective utilization of the phosphogypsum is an urgent problem.
The traditional road base material adopts cement graded broken stone, has low tensile strength and is easy to crack, and the service life and stability of the road are affected. CN104909695B discloses a phosphogypsum hydraulic road base material, which is produced by using phosphogypsum, and a new utilization means is provided by using a large amount of solid waste phosphogypsum, which is beneficial to environmental protection. However, the curing speed of the prior art is slower under the low temperature condition, the production efficiency is lower, and the formed road base layer has poor compression resistance and low stability.
Disclosure of Invention
In order to solve the problems, the invention provides a rapid-curing road base material which can be constructed at a low temperature, and the rapid-curing road base material comprises the following preparation raw materials in parts by weight: 70-90 parts of phosphogypsum, 10-20 parts of cement, 0.15-4.5 parts of curing agent, 0.14-1.8 parts of functional resin and 1-5 parts of auxiliary agent.
In a preferred embodiment, the preparation comprises: 85 parts of phosphogypsum, 12 parts of cement, 2 parts of curing agent, 1 part of functional resin and 2 parts of auxiliary agent.
The phosphogypsum is selected from any one of dry phosphogypsum and wet phosphogypsum.
The cement is selected from any one of ordinary Portland cement or quick hardening cement.
Further, the cement is a rapid hardening cement.
Further, the rapid hardening cement is one of rapid hardening silicate cement and rapid hardening sulphoaluminate cement.
As a preferable scheme, the rapid hardening cement is rapid hardening sulphoaluminate cement.
Based on the system, the dry-discharged phosphogypsum or the wet-discharged phosphogypsum is used as the main raw material of the road base material, so that the recycling of solid waste resources is realized, the production cost is low, the environment is protected, but the hydration hardening process of the phosphogypsum under the low-temperature condition in the prior art is slow, and the formation of the later strength is not facilitated.
The inventor finds that based on the system of the invention, 10-20 parts by weight of quick hardening cement is introduced, especially when the introduced quick hardening cement is quick hardening sulphoaluminate cement, on one hand, the quick hardening cement can react with dry or wet phosphogypsum to generate a crosslinked hydraulic sulphoaluminate gel system, so that a carrier is provided for the subsequent reaction of phosphogypsum and a curing agent, thereby being beneficial to realizing the quick curing of road base materials, reducing the production conditions, prolonging the service period of the materials and realizing the stable construction at low temperature; on the other hand, the road base material has a coagulation speed and a foaming speed which tend to be consistent, so that the segregation of the road base material is effectively avoided, and the later strength of the road base material is ensured.
The curing agent comprises at least a styrene-acrylate copolymer.
The functional resin is prepared from at least acrylic acid monomer, sodium hydroxide aqueous solution, sodium persulfate, polyethylene glycol diacrylate, polyvinyl alcohol, methacrylamide, ethylene glycol diglycidyl ether, alkane compounds and span.
The functional resin comprises the following preparation steps:
(1) Adding 6-9g of acrylic acid monomer into 0.5-1L 1-3mol/L sodium hydroxide aqueous solution under the ice water bath condition, and stirring and reacting to obtain acrylic acid/sodium acrylate mixed monomer solution;
(2) Adding 0.01-0.1g of sodium persulfate, 0.001-0.01g of polyethylene glycol diacrylate, 6-9g of polyvinyl alcohol and 6-9g of methacrylamide into the acrylic acid/sodium acrylate mixed monomer solution for reaction, and drying to obtain a crosslinked polymer;
(3) Adding the crosslinked polymer into 80-120mL of alkane compound, adding 0.1-0.5g span and 0.05-0.3g glycol diglycidyl ether, reacting for 1-2h at 70-90 ℃, drying, and ball-milling to the particle size of 100-200 microns.
As a preferable technical scheme, the preparation method of the functional resin comprises the following steps:
(1) Under the ice water bath condition, adding 7.2g of acrylic acid monomer into 0.8L1-3 mol/L sodium hydroxide aqueous solution, and stirring and reacting to obtain acrylic acid/sodium acrylate mixed monomer solution;
(2) Adding 0.05g of sodium persulfate, 0.005g of polyethylene glycol diacrylate, 8g of polyvinyl alcohol and 8g of methacrylamide into the acrylic acid/sodium acrylate mixed monomer solution for reaction, and drying to obtain a crosslinked polymer;
(3) Adding the crosslinked polymer into 100mL of alkane compound, adding 0.2g span and 0.1g ethylene glycol diglycidyl ether to react for 1.5h at 80 ℃, drying and ball-milling to the particle size of 100 microns.
The alkane compound is selected from one or a combination of a plurality of n-hexane, n-heptane, n-octane, 2-methyl hexane, 3-ethyl pentane, cyclohexane, methylcyclohexane, cyclopentane, methylcyclopentane, benzene, toluene and xylene.
In a preferred embodiment, the alkane compound is selected from n-octane.
The span is selected from one or a combination of a plurality of spans 20, 40, 60 and 80.
In a preferred embodiment, the span is selected from span 80.
The inventor finds that the basic material obtained by doping phosphogypsum and cement is influenced by construction strength, temperature and humidity, the structural instability of the material is increased, the formed road basic layer is extremely easy to crack, the service life and stability of a road are seriously influenced, in order to solve the problems, the inventor introduces functional resin, and the mass ratio of the cement, the curing agent and the functional resin is controlled to be (10-15): (1-3): (0.5-1.8), and the phosphogypsum in the system is subjected to specific action to form the stable and consolidated phosphogypsum road base layer.
The inventor carries out chemical copolymerization on acrylic acid monomer, polyvinyl alcohol and methacrylamide, adopts polyethylene glycol diacrylate and ethylene glycol diglycidyl ether to carry out two-time crosslinking, obtains functional resin with a semi-interpenetrating network structure, is applied to the preparation of road base materials, improves the tensile strength of the road base, avoids cracking caused by shrinkage of the prepared road base due to hydration of cement in a system, and probably due to the introduction of the functional resin with a specific structure, phosphogypsum and cement in the system are connected to form a unified whole, the tensile strength of the road base is improved, meanwhile, water molecules which invade can be effectively bound, unstable material structure caused by invasion of water molecules is avoided, the spatial stability of the road base is ensured, and the problems of bearing capacity and shortened service life of a road caused by reflection cracks generated by the road base are avoided.
The inventor finds that the secondary crosslinking process of the functional resin influences the structure and the performance of the functional resin, and further influences the comprehensive performance of the functional resin applied to the prepared road base material, and the inventor unexpectedly finds that controlling the alkane compound to be n-octane and matching span 80 can enable the crosslinked polymer and the ethylene glycol diglycidyl ether to realize good dispersion crosslinking, so that the polyvinyl alcohol is inserted into the crosslinked network structure of polyacrylic acid-sodium polyacrylate-methacrylamide, a semi-interpenetrating surface crosslinked network structure is formed, and the functional resin is ensured to be effectively applied to the preparation of the road base material.
Further, the inventors found during the investigation that when the particle diameter of the functional resin is higher than 200 μm, the flatness of the road base layer formed after curing is affected.
The auxiliary agent at least comprises a water reducing agent, a coagulation accelerator and an adhesion promoter.
The water reducer is at least one of a polycarboxylic acid high-efficiency water reducer, an sulfamate water reducer and a naphthalene water reducer.
Preferably, the water reducer is a polycarboxylic acid water reducer.
The coagulant is at least one selected from aluminum sulfate, lithium chloride and lithium carbonate.
Preferably, the accelerator is aluminum sulfate.
The adhesion promoter is selected from one or a combination of several of polyvinyl alcohol, hydroxypropyl methyl cellulose, redispersible emulsion powder and methyl cellulose;
preferably, the adhesion promoter is a combination of redispersible latex powder and polyvinyl alcohol.
Further, the mass ratio of the redispersible emulsion powder to the polyvinyl alcohol is (3-5): (0.8-1.2).
The redispersible emulsion powder is selected from one or a combination of more of vinyl acetate and ethylene copolymerized rubber powder, ethylene and vinyl chloride and ethylene laurate copolymerized rubber powder, vinyl acetate and ethylene and higher fatty acid vinyl ester copolymerized rubber powder, vinyl acetate and higher fatty acid vinyl ester copolymerized rubber powder, acrylic ester and styrene copolymerized rubber powder, styrene and butadiene copolymerized rubber powder and vinyl acetate homo-polymerized rubber powder.
Preferably, the redispersible emulsion powder is acrylic ester and styrene copolymerized emulsion powder.
Based on the system of the invention, the mass ratio is (3-5): the redispersible emulsion powder and the polyvinyl alcohol (0.8-1.2) enable the provided road base material to be tightly attached to a road base surface, under the mass ratio, the hydrophilic polyvinyl alcohol plays a role in protecting the redispersible emulsion powder, so that the redispersible emulsion powder can form a continuous film after meeting water to play a role in cementing, but different redispersible emulsion powder has larger difference in cementing effect on the raw materials in the system, and the inventor finds that when the redispersible emulsion powder in the system is acrylic ester and styrene copolymer emulsion powder, the cementing effect of the raw materials in the system is the best, the cohesion and adhesive force of the road base material are effectively improved, the cracking is reduced, the mixture is filled into gaps of a road base pavement, the structural strength of the road base is increased, and the water-proof property of the road base is improved. The inventor analyzes that the reason is probably that based on the special structure of the acrylic ester and styrene copolymerized rubber powder, the acrylic ester and styrene copolymerized rubber powder has good combination effect with other raw materials in the system, and the acrylic ester and styrene copolymerized rubber powder is fully dispersed in the system to form a film and is used as a reinforcing material to be distributed in the whole road base structure, so that the cohesion of the road base is increased, the structural strength of the road base is ensured, and the anti-seepage and waterproof performances of the road base are improved.
The preparation process of the rapid-curing road base material comprises the following steps:
(1) Mixing and stirring 70-90 parts of phosphogypsum and 10-20 parts of cement according to parts by mass to obtain a mixture A;
(2) Mixing the mixture A, 0.15-4.5 parts of curing agent, 0.14-1.8 parts of functional resin and 1-5 parts of auxiliary agent uniformly by weight.
As a preferable technical scheme, the preparation process of the rapid-curing road base material comprises the following steps:
(1) According to the mass parts, 85 parts of phosphogypsum and 12 parts of cement are mixed and stirred uniformly to obtain a mixture A;
(2) And uniformly stirring and mixing the mixture A, 2 parts of curing agent, 1 part of functional resin and 2 parts of auxiliary agent according to parts by weight.
The beneficial effects are that:
1. the system of the invention comprises the following components in percentage by mass (3-5): (0.8-1.2) and polyvinyl alcohol so that the provided road base material can be tightly attached to a road base surface, thereby increasing the structural strength of the roadbed and improving the anti-seepage and waterproof performances.
2. The road base material disclosed by the invention has the advantages of high tensile strength, difficulty in cracking, capability of improving the structural strength of a roadbed, anti-seepage and waterproof performances, higher strength and road bearing capacity, and capability of prolonging the service life and improving the stability of a road.
Detailed Description
Example 1
The embodiment 1 of the invention discloses a rapid-curing road base material, which comprises the following preparation raw materials in parts by mass: 82 parts of phosphogypsum, 15 parts of quick hardening sulphoaluminate cement, 3 parts of curing agent, 1.8 parts of functional resin and 5 parts of auxiliary agent.
The preparation method of the functional resin comprises the following steps:
(1) Under the ice water bath condition, adding 9g of acrylic acid monomer into 1L of 3mol/L sodium hydroxide aqueous solution, and stirring and reacting to obtain acrylic acid/sodium acrylate mixed monomer solution;
(2) Adding 0.1g of sodium persulfate, 0.01g of polyethylene glycol diacrylate, 9g of polyvinyl alcohol and 9g of methacrylamide into the acrylic acid/sodium acrylate mixed monomer solution for reaction, and drying to obtain a crosslinked polymer;
(3) Adding the crosslinked polymer into 120mL of n-octane, adding 0.5g of span 80 and 0.3g of ethylene glycol diglycidyl ether to react for 2 hours at 90 ℃, drying, and ball-milling until the particle size is 200 microns to obtain the functional resin.
The preparation method of the auxiliary agent comprises the following steps: 5 parts of acrylic ester and styrene copolymerized rubber powder and 0.8 part of polyvinyl alcohol are mixed to obtain an auxiliary agent.
The phosphogypsum is wet phosphogypsum, and comes from Hubei Xinyang Feng modern agriculture development limited company.
The quick hardening sulphoaluminate cement is purchased from Zhengzhou shield sludge building materials Co.
The curing agent is purchased from Yu Daokang Ning (Shenzhen Co., ltd., model 2655).
The acrylic ester and styrene copolymer rubber powder is purchased from Beijing Wan Ming technology Co., ltd, and the model is FX7000.
The embodiment 1 of the invention on the other hand discloses a preparation process of a rapid-curing road base material, which comprises the following preparation steps:
(1) According to the mass parts, 82 parts of phosphogypsum and 15 parts of quick hardening sulphoaluminate cement are mixed and stirred uniformly to obtain a mixture A;
(2) And uniformly stirring and mixing the mixture A, 3 parts of curing agent, 1.8 parts of functional resin and 5 parts of auxiliary agent according to parts by weight.
Example 2
The embodiment 2 of the invention discloses a rapid-curing road base material, which comprises the following preparation raw materials in parts by mass: 90 parts of phosphogypsum, 10 parts of quick hardening sulphoaluminate cement, 1 part of curing agent, 0.5 part of functional resin and 1 part of auxiliary agent.
The preparation method of the functional resin comprises the following steps:
(1) Under the ice water bath condition, adding 6g of acrylic acid monomer into 0.5L of 1mol/L sodium hydroxide aqueous solution, and stirring and reacting to obtain acrylic acid/sodium acrylate mixed monomer solution;
(2) Adding 0.01g of sodium persulfate, 0.001g of polyethylene glycol diacrylate, 6g of polyvinyl alcohol and 6g of methacrylamide into the acrylic acid/sodium acrylate mixed monomer solution for reaction, and drying to obtain a crosslinked polymer;
(3) Adding the crosslinked polymer into 80mL of n-octane, adding 0.1g of span 80 and 0.05g of ethylene glycol diglycidyl ether to react for 1h at 70 ℃, drying, and ball-milling until the particle size is 100 microns to obtain the functional resin.
The preparation method of the auxiliary agent comprises the following steps: 3 parts of acrylic ester and 1.2 parts of polyvinyl alcohol are mixed to obtain the auxiliary agent.
The phosphogypsum is dry phosphogypsum, and comes from Hubei Xinyang Feng modern agriculture development limited company.
The quick hardening sulphoaluminate cement is purchased from Zhengzhou shield sludge building materials Co.
The curing agent is purchased from Yu Daokang Ning (Shenzhen Co., ltd., model 2655).
The acrylic ester and styrene copolymer rubber powder is purchased from Beijing Wan Ming technology Co., ltd, and the model is FX7000.
The embodiment 2 of the invention on the other hand discloses a preparation process of a rapid-curing road base material, which comprises the following preparation steps:
(1) According to the mass parts, mixing and stirring 90 parts of phosphogypsum and 10 parts of quick hardening sulphoaluminate cement uniformly to obtain a mixture A;
(2) And uniformly stirring and mixing the mixture A, 1 part of curing agent, 0.5 part of functional resin and 1 part of auxiliary agent according to parts by weight.
Example 3
The embodiment 3 of the invention discloses a rapid-curing road base material, which comprises the following preparation raw materials in parts by mass: 85 parts of phosphogypsum, 12 parts of quick hardening sulphoaluminate cement, 2 parts of curing agent, 1 part of functional resin and 2 parts of auxiliary agent.
The preparation method of the functional resin comprises the following steps:
(1) Under the ice water bath condition, adding 7.2g of acrylic acid monomer into 0.8L of 2mol/L sodium hydroxide aqueous solution, and stirring and reacting to obtain acrylic acid/sodium acrylate mixed monomer solution;
(2) Adding 0.05g of sodium persulfate, 0.005g of polyethylene glycol diacrylate, 8g of polyvinyl alcohol and 8g of methacrylamide into the acrylic acid/sodium acrylate mixed monomer solution for reaction, and drying to obtain a crosslinked polymer;
(3) Adding the crosslinked polymer into 100mL of n-octane, adding 0.2g of span 80 and 0.1g of ethylene glycol diglycidyl ether to react for 1.5 hours at 80 ℃, drying and ball-milling until the particle size is 100 microns to obtain the functional resin.
The preparation method of the auxiliary agent comprises the following steps: 4 parts of acrylic ester and styrene copolymerized rubber powder and 1 part of polyvinyl alcohol are mixed to obtain an auxiliary agent.
The phosphogypsum is wet phosphogypsum, and comes from Hubei Xinyang Feng modern agriculture development limited company.
The quick hardening sulphoaluminate cement is purchased from Zhengzhou shield sludge building materials Co. The curing agent is purchased from Yu Daokang Ning (Shenzhen Co., ltd., model 2655).
The acrylic ester and styrene copolymer rubber powder is purchased from Beijing Wan Ming technology Co., ltd, and the model is FX7000.
The embodiment 3 of the invention on the other hand discloses a preparation process of a rapid-curing road base material, which comprises the following preparation steps:
(1) According to the mass parts, 85 parts of phosphogypsum and 12 parts of quick hardening sulphoaluminate cement are mixed and stirred uniformly to obtain a mixture A;
(2) And uniformly stirring and mixing the mixture A, 2 parts of curing agent, 1 part of functional resin and 2 parts of auxiliary agent according to parts by weight.
Comparative example 1
N-octane was replaced with n-dodecane, span 80 was replaced with tween 80, and the remainder was the same as in example 3.
Comparative example 2
2 parts of acrylic ester and 2 parts of styrene copolymer rubber powder are mixed to obtain an auxiliary agent, and the rest is the same as in example 3.
Comparative example 3
The procedure of example 3 was repeated except that 18 parts of the rapid hardening sulfoaluminate cement, 5 parts of the curing agent and 2 parts of the functional resin were used instead.
Performance testing
The base material is subjected to unconfined compression resistance, splitting and flexural tensile strength tests by referring to a test method of highway engineering inorganic binder stable material test procedure (JTGE 51-2009)
Adding water into the rapidly solidified road base material, stirring to obtain slurry with 15% of water content, paving and rolling the road surface, performing moisture preservation and maintenance for 3 days to form a road base with stable solidification, performing an unconfined compression test, a split strength test and a flexural tensile strength test, and filling the test results into the following table:
Figure BDA0004004530390000081
what has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.

Claims (10)

1. The rapid-curing road base material is characterized by comprising the following preparation raw materials in parts by weight: 70-90 parts of phosphogypsum, 10-20 parts of cement, 0.15-4.5 parts of curing agent, 0.14-1.8 parts of functional resin and 1-5 parts of auxiliary agent.
2. The base material of claim 1, wherein the phosphogypsum is selected from any one of dry phosphogypsum and wet phosphogypsum.
3. The base material of claim 1, wherein the cement is selected from any one of Portland cement or quick setting cement.
4. The base material of claim 1, wherein the curing agent comprises at least a styrene-acrylate copolymer.
5. The base material according to claim 1, wherein the functional resin is prepared from at least acrylic acid monomer, sodium hydroxide aqueous solution, sodium persulfate, polyethylene glycol diacrylate, polyvinyl alcohol, methacrylamide, ethylene glycol diglycidyl ether, alkane compound, span.
6. The base material according to claim 5, wherein the functional resin comprises the following preparation steps:
(1) Adding 6-9g of acrylic acid monomer into 0.5-1L 1-3mol/L sodium hydroxide aqueous solution under the ice water bath condition, and stirring and reacting to obtain acrylic acid/sodium acrylate mixed monomer solution;
(2) Adding 0.01-0.1g of sodium persulfate, 0.001-0.01g of polyethylene glycol diacrylate, 6-9g of polyvinyl alcohol and 6-9g of methacrylamide into the acrylic acid/sodium acrylate mixed monomer solution for reaction, and drying to obtain a crosslinked polymer;
(3) Adding the crosslinked polymer into 80-120mL of alkane compound, adding 0.1-0.5g span and 0.05-0.3g glycol diglycidyl ether, reacting for 1-3h at 70-90 ℃, drying, and ball-milling to the particle size of 100-200 microns.
7. The base material according to claim 6, wherein the alkane compound is selected from one or a combination of several of n-hexane, n-heptane, n-octane, 2-methylhexane, 3-ethylpentane, cyclohexane, methylcyclohexane, cyclopentane, methylcyclopentane, benzene, toluene and xylene; the span is selected from one or a combination of a plurality of spans 20, 40, 60 and 80.
8. The base material of claim 1, wherein the auxiliary agents include a water reducing agent, a setting accelerator, and an adhesion promoter.
9. The base material according to claim 8, wherein the water reducing agent is at least one selected from the group consisting of a polycarboxylic acid-based high efficiency water reducing agent, an sulfamate-based water reducing agent, and a naphthalene-based water reducing agent.
10. A process for the preparation of a rapidly curing road base material according to any one of claims 1 to 9, comprising the steps of:
(1) Mixing and stirring 70-90 parts of phosphogypsum and 10-20 parts of cement according to parts by mass to obtain a mixture A;
(2) Mixing the mixture A, the curing agent 0.15-4.5 parts, the functional resin 0.14-1.8 parts and the auxiliary agent 1-5 parts by weight uniformly.
CN202211628259.1A 2022-12-17 2022-12-17 Rapidly-cured road base material and preparation process thereof Pending CN116120021A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2854301A1 (en) * 2002-03-07 2003-09-18 Saint-Gobain Placo Method and composition for polymer-reinforced composite cementitious construction material
CN104909695A (en) * 2015-05-28 2015-09-16 武汉德利保生态技术有限公司 Phosphogypsum water hard road base, road base material and preparation method thereof
CN111433260A (en) * 2017-12-11 2020-07-17 株式会社Lg化学 Superabsorbent polymer composition and method of making the same
CN113636781A (en) * 2021-08-17 2021-11-12 孙建忠 Cement curing agent and cement curing process using same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2854301A1 (en) * 2002-03-07 2003-09-18 Saint-Gobain Placo Method and composition for polymer-reinforced composite cementitious construction material
CN104909695A (en) * 2015-05-28 2015-09-16 武汉德利保生态技术有限公司 Phosphogypsum water hard road base, road base material and preparation method thereof
CN111433260A (en) * 2017-12-11 2020-07-17 株式会社Lg化学 Superabsorbent polymer composition and method of making the same
CN113636781A (en) * 2021-08-17 2021-11-12 孙建忠 Cement curing agent and cement curing process using same

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