WO2022056975A1 - Procédé de préparation d'un mélange d'acide polycarboxylique destiné à être utilisé dans du béton de sable fabriqué en machine - Google Patents

Procédé de préparation d'un mélange d'acide polycarboxylique destiné à être utilisé dans du béton de sable fabriqué en machine Download PDF

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WO2022056975A1
WO2022056975A1 PCT/CN2020/120796 CN2020120796W WO2022056975A1 WO 2022056975 A1 WO2022056975 A1 WO 2022056975A1 CN 2020120796 W CN2020120796 W CN 2020120796W WO 2022056975 A1 WO2022056975 A1 WO 2022056975A1
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machine
water
made sand
admixture
concrete
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PCT/CN2020/120796
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Chinese (zh)
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王文军
王道正
雷文晗
陈囡
赵力
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江苏尼高科技有限公司
常州市建筑科学研究院集团股份有限公司
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Publication of WO2022056975A1 publication Critical patent/WO2022056975A1/fr

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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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
    • 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
    • C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
    • C04B24/42—Organo-silicon compounds
    • 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
    • C08F2/00—Processes of polymerisation
    • C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
    • 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
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • 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
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
    • 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
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
    • C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
    • 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
    • C08F4/00—Polymerisation catalysts
    • C08F4/40—Redox systems
    • 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

Definitions

  • the invention belongs to the field of cement-based concrete admixtures, and is suitable for machine-made sand concrete with severe gradation failure and high stone powder content, in particular to a preparation method of a polycarboxylic acid admixture for machine-made sand concrete.
  • the patent with publication number CN 109627394 A discloses a water reducing agent suitable for machine-made sand concrete and its preparation method. Specifically, isobutenol polyoxyethylene ether, acrylic acid and 2-acrylamido dodecyl sulfonic acid are used as the main reaction units to initiate a free copolymerization reaction under a redox reaction system at 55 to 75 ° C. After the reaction, use A polycarboxylate water reducing agent suitable for machine-made sand concrete can be obtained by neutralizing the organic alkali.
  • the solution provided by this patent is based on the idea of isobutenol polyoxyethylene ether as the main reaction body. Compared with the idea of ethylene glycol monovinyl polyethylene glycol ether (EPEG) monomer, the performance space is limited, the production process is complicated, and the production High energy consumption.
  • EPEG ethylene glycol monovinyl polyethylene glycol ether
  • CN 111153627 A discloses a kind of anti-mud type admixture suitable for machine-made sand concrete and its compound method.
  • the main method is to compound viscosity-reducing polycarboxylate water-reducing agent, lignin water-reducing agent, water and defoamer.
  • This patent mainly describes the combination of viscosity-reducing polycarboxylate water-reducing agent, lignin water-reducing agent and defoaming agent to configure an anti-mud type admixture suitable for machine-made sand concrete.
  • the main raw material of the viscosity-reducing polycarboxylic acid provided in the patent is methacrylic acid-polyethylene glycol methyl ether ester as the main raw material.
  • the production process of this raw material requires a high-temperature esterification process, which has a long production cycle and high energy consumption.
  • the lignosulfonate water reducing agent used in the anti-mud type admixture product has poor resistance to concrete slump loss.
  • the technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, a novel preparation method of a polycarboxylic acid admixture for machine-made sand concrete is provided.
  • the technical scheme adopted in the present invention is: a method for preparing a polycarboxylic acid admixture for machine-made sand concrete, which is characterized in that it comprises the following steps:
  • material preparation ethylene glycol monovinyl polyglycol ether monomer is dissolved in water gained solution as bottom material, acrylic acid, chain transfer agent are dissolved in water gained mixed solution as A material, reducing agent is dissolved in water gained solution as B material;
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, adding the hydrogen peroxide whose mass fraction is 27.5% in the reactor and stirring evenly, then dripping in the reactor Add material A and material B, and the dropwise addition is completed in 1-1.5 hours. After the dropwise addition, the reaction kettle is kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor of step (1) III gained and polyether phosphate, foam control agent, viscosity modifier, water are compounded in proportion at normal temperature, and the mass parts of each material are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained.
  • the ethylene glycol monovinyl polyglycol ether (EPEG) monomer is used as the main synthetic unit and acrylic acid and its derivatives are copolymerized under the action of a redox initiation system to form an anti-mud type water reducing agent with a comb-shaped molecular structure.
  • EPEG ethylene glycol monovinyl polyglycol ether
  • Its concrete water reduction rate is ⁇ 32%; then it can solve the problems of large slump loss and poor material adaptability by compounding with polyether phosphate and organic foam control agent, and can significantly increase the strength of concrete; it can be solved by compounding with concrete viscosity modifier Segregation, bleeding, bottom scraping and other phenomena caused by broken gradation of machine-made sand, fluctuation of stone powder and fluctuation of fine sand and mud content.
  • the molar ratio of the ether group of ethylene glycol monovinyl polyethylene glycol ether in the base material in the step (1) I to the acid group of the acrylic acid in the A material is 3 to 5:1.
  • the solute mass ratio of the bottom material and the A material is 1:0.05-0.15.
  • the molecular weight of ethylene glycol monovinyl polyglycol ether in the bottom material in described step (1) I is 2400, 3000 or 6000.
  • the chain transfer agent in material A is one or a mixture of mercaptopropionic acid and mercaptoacetic acid.
  • the reductant of the B material in the step (1) I is a low-temperature reductant (H001) that can undergo an oxidation-reduction reaction with hydrogen peroxide under a low-temperature condition.
  • the solute mass ratio of hydrogen peroxide and material B is 0.8-2:1.
  • the ratio of the solute mass sum of the base material monomer EPEG to hydrogen peroxide and material B is 100:0.3-0.8.
  • the mud-resistant polycarboxylate water-reducing agent prepared in the step (1) has a concrete water-reducing rate of more than 32%, and has a certain slump-preserving performance.
  • the organic foam control agent in the step (2) is an organic alkynyl alcohol substance, which has the functions of inhibiting the generation of large bubbles in the concrete and introducing tiny bubbles, and can directly replace the traditional silicone, polyether defoamer and air-entraining agent. agent combination.
  • the polyether phosphate in the step (2) is an organic small molecular substance that has a certain effect of retarding setting and slump protection for concrete and can increase the compressive strength.
  • the concrete viscosity modifier in the step (2) is a biopolymeric admixture, which can change the rheological properties of the concrete and has a certain water retention effect, so that the concrete is not easily segregated when using broken graded machine-made sand and contains a lot of stone powder. , bleeding, scraping the bottom and other phenomena.
  • the polycarboxylate water-reducing agent mother liquor synthesized in the present invention takes ethylene glycol monovinyl polyglycol ether (EPEG) monomer as the main raw material and acrylic acid or its derivatives under the action of redox reaction system.
  • EPEG ethylene glycol monovinyl polyglycol ether
  • the polycarboxylate water-reducing agent with comb-shaped molecular structure is formed by the copolymerization of radicals.
  • HPEG isobutenol polyoxyethylene ether
  • TPEG isopentenol polyoxyethylene ether
  • the substitution structure further reduces the steric resistance of the swing of the polyether side chain, making the swing of the polyether side chain more free and the range of activities larger; the increase in the degree of freedom of the swing of the polyether side chain improves the encapsulation and flexibility of the polyether side chain. Therefore, the synthesized polycarboxylate water-reducing agent has better adaptability, especially in the case of poor sand and gravel quality and high mud content.
  • the polyether phosphate selected in the present invention is mainly an organic molecular compound containing a phosphate structure, which has an obvious inhibitory effect on the excessive adsorption of the polycarboxylate water reducing agent by the stone powder and fine sand in the machine-made sand. It controls the slump loss, has a certain dispersing effect on the cement, and can effectively increase the strength of concrete in the middle and late stages.
  • the organic alkynyl alcohol foam control agent in the invention can control the size of air bubbles in concrete, eliminate large air bubbles that have harmful effects on concrete, and leave small air bubbles that can improve the fluidity and durability of concrete, replacing traditional defoamer and Air-entraining agent component; and has good compatibility with polycarboxylate water reducer, and is not easy to cause quality fluctuations due to delamination.
  • the present invention uses EPEG as the main body to synthesize a polycarboxylate water reducing agent with less resistance to the space movement of the polyether side chain and greater degree of freedom, which has better performance in dealing with broken-graded machine-made sand and fine sand with high mud content. effect.
  • polyether phosphate can significantly reduce slump loss and increase strength.
  • organic foam control agent can significantly adjust the bubble structure of concrete, eliminate large bubbles, introduce small bubbles, and improve the fluidity of concrete.
  • the function of concrete viscosity adjusting material is to improve the water retention of concrete and improve the phenomenon of segregation and bleeding.
  • the present invention has the following advantages:
  • the polycarboxylate water-reducing agent prepared by the present invention effectively solves the problems of large concrete slump, poor workability and insufficient strength caused by large content of machine-made sand and gravel powder and broken gradation.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/580*570mm, 200/510*500mm, 25.5MP, 33.5MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/580*580mm, 200/510*520mm, 25.0MP, 33.8MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 4.0 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/575*570mm, 190/500*530mm, 26.6MP, 34.5MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/590*580mm, 210/530*520mm, 26.5MP, 35.2MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/580*580mm, 220/530*550mm, 27.0MP, 36.9MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 240/590*600mm, 220/550*560mm, 28.9MP, 37.8MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/580*575mm, 200/510*505mm, 25.9MP, 33.8MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 230/580*580mm, 200/510*510mm, 26.3MP, 34.7MP.
  • a method for preparing a polycarboxylic acid admixture for machine-made sand concrete comprising the following steps:
  • step II redox: adding the bottom material obtained in step 1 into the reactor, controlling the temperature in the reactor at 5 ⁇ 16 °C, then adding 3.5 parts by mass of hydrogen peroxide with a mass fraction of 27.5% to the reactor and stirring uniformly, then to the reaction Material A and material B were added dropwise to the kettle, and the dropwise addition was completed in 1.5 hours. After the dropwise addition, the reaction kettle was kept at 25-35 °C for 1 hour;
  • the anti-mud type polycarboxylate water-reducing agent mother liquor obtained in step (1) III is compounded in proportion with polyether phosphate, foam control agent, viscosity regulator, and water at normal temperature (10-35° C.), and each substance is The parts by mass are:
  • the polycarboxylate admixture for machine-made sand concrete is obtained, and the initial slump/expansion degree, 1h slump/expansion degree, 7d compressive strength and 28d compressive strength of the obtained mud-resistant polycarboxylate admixture concrete are respectively 240/590*610mm, 220/550*570mm, 29.3MP, 38.4MP.
  • the polycarboxylate admixture for machine-made sand concrete prepared by the above examples has high concrete water reduction rate, strong slump resistance resistance and good workability of concrete, and the compressive strength of concrete 7d and 28d is significantly improved.

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

Abstract

Procédé de préparation d'un mélange d'acide polycarboxylique destiné à être utilisé dans un béton de sable fabriqué en machine, comprenant les étapes suivantes consistant : (1) à préparer un mélange maître de réducteur d'eau acide polycarboxylique résistant aux boues avec des monomères éthylène-glycol monovinyl polyéthylène glycol (EPEG) servant d'unités de réaction primaires, et (2) à mélanger proportionnellement à température ambiante le mélange maître de réducteur d'eau acide polycarboxylique résistant aux boues, un organophosphate de polyéther, un agent de régulation de mousse, un modificateur de viscosité de béton et de l'eau pour produire le mélange d'acide polycarboxylique destiné à être utilisé dans le béton de sable fabriqué en machine. Le mélange d'acide polycarboxylique destiné à être utilisé dans le béton de sable fabriqué en machine a un taux de réduction d'eau élevé, présente une forte adaptabilité aux matériaux, fournit une capacité améliorée de régulation de la perte d'affaissement, et a pour effet de supprimer de grosses bulles dans le béton et d'améliorer la maniabilité du béton, et, par rapport au béton de sable fabriqué en machine qui est à granulométrie discontinue et a une teneur élevée en poudre de roche (6 à 12 %), il a pour effet d'améliorer considérablement la maniabilité et d'augmenter la résistance.
PCT/CN2020/120796 2020-09-17 2020-10-14 Procédé de préparation d'un mélange d'acide polycarboxylique destiné à être utilisé dans du béton de sable fabriqué en machine WO2022056975A1 (fr)

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CN202010981041.9A CN114195421B (zh) 2020-09-17 2020-09-17 一种用于机制砂混凝土的聚羧酸外加剂制备方法
CN202010981041.9 2020-09-17

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Cited By (10)

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CN114477837A (zh) * 2022-04-15 2022-05-13 石家庄市长安育才建材有限公司 减水剂及其制备方法
CN114621401A (zh) * 2022-04-26 2022-06-14 洛阳君江建材科技有限公司 一种用于赤泥浆化的分散剂
CN114751671A (zh) * 2022-04-07 2022-07-15 云南省建设投资控股集团有限公司 一种机制砂高强混凝土聚羧酸外加剂的制备方法
CN114988740A (zh) * 2022-07-06 2022-09-02 重庆国浩永固新型建材有限公司 一种抗泥掺合料及其制备方法和应用
CN116023062A (zh) * 2022-12-28 2023-04-28 四川金江建材科技有限公司 一种混凝土用水性增效剂及其制备方法
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CN117228983A (zh) * 2023-09-27 2023-12-15 石家庄市长安育才建材有限公司 一种抑制机制砂中絮凝剂的外加剂及其制备方法
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN115745459A (zh) * 2022-12-05 2023-03-07 中国建筑第八工程局有限公司 一种提浆抗泥型减水剂、制备方法及应用

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655272A1 (fr) * 2004-11-04 2006-05-10 Mapei S.p.A. Superplastifiants pour prolonger l'ouvrabilité des mortiers
KR101177307B1 (ko) * 2012-03-30 2012-08-30 주식회사 정우소재 수중공사용 수중불분리 시멘트
CN109053971A (zh) * 2018-07-09 2018-12-21 湖北工业大学 一种高羧基密度长短支链的聚羧酸减水剂制备方法
CN109824836A (zh) * 2019-01-29 2019-05-31 广东瑞安科技实业有限公司 和易性好、适应性广的聚羧酸减水剂及其制备方法
CN109880019A (zh) * 2019-01-29 2019-06-14 广东瑞安科技实业有限公司 一种和易性好、适应性广的聚羧酸减水剂及其制备方法
CN110655346A (zh) * 2019-09-29 2020-01-07 湖南中岩建材科技有限公司 一种机制砂调节剂及制备方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103664052A (zh) * 2013-11-29 2014-03-26 上海三瑞高分子材料有限公司 一种用于机制砂混凝土的聚羧酸减水剂
CN106336138B (zh) * 2016-08-15 2018-10-19 岳阳凯门水性助剂有限公司 一种控泡剂及其制成的引气减水复配剂、混凝土
CN106277899A (zh) * 2016-08-22 2017-01-04 山西大学 一种聚羧酸减水剂及其制备方法
CN108409193B (zh) * 2018-03-19 2019-06-25 中建西部建设贵州有限公司 一种机制砂c120超高强混凝土聚羧酸外加剂及其制备方法
CN109293276A (zh) * 2018-10-25 2019-02-01 湖南中岩建材科技有限公司 一种增粘保水型外加剂及其制备方法和应用
CN109467632B (zh) * 2018-10-29 2021-02-26 科之杰新材料集团河南有限公司 一种长效缓释型聚羧酸保坍剂及其制备方法
CN109320163A (zh) * 2018-10-30 2019-02-12 中建西部建设西南有限公司 一种c30低胶材自密实混凝土及其制备方法
CN111377642B (zh) * 2018-12-31 2021-09-28 江苏苏博特新材料股份有限公司 一种多元吸附聚羧酸减水剂及其制备方法和应用
CN110028632A (zh) * 2019-04-25 2019-07-19 江苏尼高科技有限公司 高减水抗泥型聚羧酸减水剂及其制备方法
CN110642994A (zh) * 2019-09-27 2020-01-03 贵州石博士科技有限公司 一种石粉适应型聚羧酸减水剂的制备方法
CN111056765B (zh) * 2019-12-06 2021-11-19 江苏四新科技应用研究所股份有限公司 一种应用于薄层自流平砂浆的消泡剂及其制备方法
CN111153627A (zh) * 2020-01-03 2020-05-15 同济大学 一种适用于机制砂混凝土的抗泥型外加剂及其复配方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655272A1 (fr) * 2004-11-04 2006-05-10 Mapei S.p.A. Superplastifiants pour prolonger l'ouvrabilité des mortiers
KR101177307B1 (ko) * 2012-03-30 2012-08-30 주식회사 정우소재 수중공사용 수중불분리 시멘트
CN109053971A (zh) * 2018-07-09 2018-12-21 湖北工业大学 一种高羧基密度长短支链的聚羧酸减水剂制备方法
CN109824836A (zh) * 2019-01-29 2019-05-31 广东瑞安科技实业有限公司 和易性好、适应性广的聚羧酸减水剂及其制备方法
CN109880019A (zh) * 2019-01-29 2019-06-14 广东瑞安科技实业有限公司 一种和易性好、适应性广的聚羧酸减水剂及其制备方法
CN110655346A (zh) * 2019-09-29 2020-01-07 湖南中岩建材科技有限公司 一种机制砂调节剂及制备方法

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114751671A (zh) * 2022-04-07 2022-07-15 云南省建设投资控股集团有限公司 一种机制砂高强混凝土聚羧酸外加剂的制备方法
CN114477837B (zh) * 2022-04-15 2022-07-29 石家庄市长安育才建材有限公司 减水剂及其制备方法
CN114477837A (zh) * 2022-04-15 2022-05-13 石家庄市长安育才建材有限公司 减水剂及其制备方法
CN114621401A (zh) * 2022-04-26 2022-06-14 洛阳君江建材科技有限公司 一种用于赤泥浆化的分散剂
CN114988740A (zh) * 2022-07-06 2022-09-02 重庆国浩永固新型建材有限公司 一种抗泥掺合料及其制备方法和应用
CN114988740B (zh) * 2022-07-06 2023-08-22 重庆国浩永固新型建材有限公司 一种抗泥掺合料及其制备方法和应用
CN116023062A (zh) * 2022-12-28 2023-04-28 四川金江建材科技有限公司 一种混凝土用水性增效剂及其制备方法
CN116023062B (zh) * 2022-12-28 2024-05-03 四川金江建材科技有限公司 一种混凝土用水性增效剂及其制备方法
CN116813281B (zh) * 2023-07-17 2024-04-12 中铁十五局集团有限公司 一种地铁工程用高性能混凝土及其制备方法
CN116813281A (zh) * 2023-07-17 2023-09-29 中铁十五局集团有限公司 一种地铁工程用高性能混凝土及其制备方法
CN116891371A (zh) * 2023-09-11 2023-10-17 高密市东泰建材有限公司 一种早强型铺装砂浆及其制备方法
CN116891371B (zh) * 2023-09-11 2023-11-24 高密市东泰建材有限公司 一种早强型铺装砂浆及其制备方法
CN117228983A (zh) * 2023-09-27 2023-12-15 石家庄市长安育才建材有限公司 一种抑制机制砂中絮凝剂的外加剂及其制备方法
CN117228983B (zh) * 2023-09-27 2024-03-01 石家庄市长安育才建材有限公司 一种抑制机制砂中絮凝剂的外加剂及其制备方法
CN117069415B (zh) * 2023-10-16 2024-01-26 四川蜀道建筑科技有限公司 一种止泌型聚羧酸减水剂、混凝土及其制备方法
CN117069415A (zh) * 2023-10-16 2023-11-17 四川蜀道建筑科技有限公司 一种止泌型聚羧酸减水剂、混凝土及其制备方法
CN118005311A (zh) * 2024-02-19 2024-05-10 佛山市利宇达建材有限公司 一种机制砂调节剂及其制备方法

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