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Damped water reducing agent and preparation method for concrete

A concrete water-reducing agent and mud-blocking technology, applied in the field of water-reducing agents, can solve the problems of large amount of water-reducing agent, low water-reducing rate, unstable quality, etc., and achieve the effect of inhibiting expansion and dispersion and achieving good water-reducing effect.

Inactive Publication Date: 2012-11-14
苏州鼎恩建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing water reducers mainly include the following two types: Naphthalene superplasticizers and polycarboxylate superplasticizers. Among them, Naphthalene superplasticizers have the advantages of mature technology and good cement adaptability, but they need to be used in the production process. A large amount of formaldehyde and sulfuric acid seriously pollute the environment; polycarboxylate water reducer has technical problems such as unstable quality and high and low water reducing rate in the preparation of high-grade concrete
As the content of clay minerals (kaolinite, montmorillonite, illite and chlorite, etc.) in concrete increases, in order to achieve a better coagulation effect, the existing water reducing agent is used in a large amount and the cost is high

Method used

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  • Damped water reducing agent and preparation method for concrete
  • Damped water reducing agent and preparation method for concrete
  • Damped water reducing agent and preparation method for concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of quaternary ammonium salt-type clay stabilizer: In a constant temperature water bath at 30°C, add epichlorohydrin to the reaction vessel, then slowly add aqueous dimethylamine solution dropwise, stir at a low speed, and then add dropwise the crosslinking agent ethylenediamine, Immediately after adding the initiator sodium sulfite and potassium persulfate, the temperature was raised to 45°C and the reaction was stopped for 6 hours to obtain a quaternary ammonium salt type clay stabilizer.

[0029] Preparation of polycarboxylate high-performance concrete water reducer: add 5% maleic anhydride, 20% polyethylene glycol monomethyl ether and 30% water to the reaction vessel, stir and heat to 80°C , and then dropwise added 3.5% of methacrylic acid, 5% of hydroxypropyl methacrylate, 1.5% of sodium methallylsulfonate and 35% of water to prepare an aqueous monomer solution. The dropping time is 3 hours, the dropping temperature is 70-80° C., the polymerization react...

Embodiment 2

[0032] Preparation of quaternary ammonium salt-type clay stabilizer: In a constant temperature water bath at 30°C, add epichlorohydrin to the reaction vessel, then slowly add aqueous dimethylamine solution dropwise, stir at a low speed, and then add dropwise the crosslinking agent ethylenediamine, Immediately after adding the initiator sodium sulfite and potassium persulfate, the temperature was raised to 45°C and the reaction was stopped for 6 hours to obtain a quaternary ammonium salt type clay stabilizer.

[0033] Preparation of polycarboxylate high-performance concrete water reducer: add 5% maleic anhydride, 20% polyethylene glycol monomethyl ether and 30% water to the reaction vessel, stir and heat to 80°C , and then dropwise added 3.5% of methacrylic acid, 5% of hydroxypropyl methacrylate, 1.5% of sodium methallylsulfonate and 35% of water to prepare an aqueous monomer solution. The dropping time is 3 hours, the dropping temperature is 70-80° C., the polymerization react...

Embodiment 3

[0036] Preparation of quaternary ammonium salt-type clay stabilizer: In a constant temperature water bath at 30°C, add epichlorohydrin to the reaction vessel, then slowly add aqueous dimethylamine solution dropwise, stir at a low speed, and then add dropwise the crosslinking agent ethylenediamine, Immediately after adding the initiator sodium sulfite and potassium persulfate, the temperature was raised to 45°C and the reaction was stopped for 6 hours to obtain a quaternary ammonium salt type clay stabilizer.

[0037] Preparation of polycarboxylate high-performance concrete water reducer: add 5% maleic anhydride, 20% polyethylene glycol monomethyl ether and 30% water to the reaction vessel, stir and heat to 80°C , and then dropwise added 3.5% of methacrylic acid, 5% of hydroxypropyl methacrylate, 1.5% of sodium methallylsulfonate and 35% of water to prepare an aqueous monomer solution. The dropping time is 3 hours, the dropping temperature is 70-80° C., the polymerization react...

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Abstract

The invention relates to the technical field of water reducing agents, particularly to a damped water reducing agent for concrete. The water reducing agent comprises 0.5-3% of a quaternary ammonium salt type clay stabilizer, 0.5-1.5% of inorganic kali salt, 3-10% of an organophosphorus series scale inhibitor, 15-20% of a polycarboxylic acid water reducing agent for high performance, and 70.7-78.5% of water. According to the water reducing agent, the quaternary ammonium salt type clay stabilizer and the inorganic kali salt are used for reducing the thickness of a diffused double layer and Zeta potential on the surface of the clay and suppressing expansion and disperse of the clay, the organophosphorus series scale inhibitor is used for attaching to the surface of the clay, molecular weight of the organophosphorus series scale inhibitor is small, so that few organophosphorus series scale inhibitor can attach to the surface of the clay to achieve good absorption and the effect is obvious. Simultaneously, the invention further discloses a preparation method for the water reducing agent. The preparation method is simple in process and reliable in operation.

Description

technical field [0001] The invention relates to the technical field of water reducers, in particular to a mud-repelling concrete water reducer and a preparation method thereof. Background technique [0002] The existing water reducers mainly include the following two types: Naphthalene superplasticizers and polycarboxylate superplasticizers. Among them, Naphthalene superplasticizers have the advantages of mature technology and good cement adaptability, but they need to be used in the production process. A large amount of formaldehyde and sulfuric acid seriously pollute the environment; and polycarboxylate water reducer has technical problems such as unstable quality and high and low water reducing rate in the preparation of high-grade concrete. As the content of clay minerals (kaolinite, montmorillonite, illite, chlorite, etc.) in concrete increases, in order to achieve a better coagulation effect, the existing water reducing agent is used in a large amount and the cost is r...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B103/30
Inventor 张劲臧军徐展
Owner 苏州鼎恩建材科技有限公司
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