Preparing method for mud stopping agent used for compound polycarboxylate superplasticizer

A composite polycarboxylic acid and water reducing agent technology, applied in the field of mud inhibitor, can solve the problems of poor performance of high mud content concrete, and achieve easy industrial production and quality control, good environmental adaptability, affinity good effect

Active Publication Date: 2016-05-25
广东省建筑材料研究院有限公司 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a preparation method of a mud-repelling agent for a composite polycarboxylate water reducer, which can solve the problem of poor performance of concrete with high mud content. The prepared mud-repelling agent and polycarboxylate The water reducing agent has good affinity and can effectively reduce the influence of mud on it

Method used

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  • Preparing method for mud stopping agent used for compound polycarboxylate superplasticizer

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Mix 72g of butenol, 81g of dimethyl diallyl ammonium chloride, 5.54g of 30% hydrogen peroxide, 10.24g of ascorbic acid and 353g of water into the four-necked flask. The temperature was raised to 55° C., stirred for 4 h, and neutralized to pH=7 with 20% sodium hydroxide solution. Add 15.3 g of polymerized zirconium chloride with a molecular weight of 600-800 and a basicity of 50%-80% for compounding to obtain mud inhibitor 1 for a composite polycarboxylate water reducer.

Embodiment 2

[0041]17.8 g of acrylamide, 17.4 g of acryl alcohol, 105.3 g of dimethyl diallyl ammonium chloride, 0.74 g of ammonium persulfate, and 0.17 g of sodium bisulfite and 327.8 g of water were mixed into a four-necked flask. The temperature was raised to 55° C., stirred for 3.5 h, and neutralized to pH=7 with 50% sodium hydroxide solution. Add 42.1 g of polyaluminum chloride with a molecular weight of 600-800 and a basicity of 50%-80% for compounding to obtain mud inhibitor 2 for a composite polycarboxylate water reducer.

Embodiment 3

[0043] Mix 54g of methallyl alcohol, 145.8g of dimethyldiallylammonium chloride and 799.2g of water into a four-necked flask. The temperature was raised to 50 °C and stirred for 5 min. Dissolve 4.5g of sodium persulfate in 40.5g of water, 5g of ascorbic acid in 45g of water, add them dropwise within 2.5 hours, and continue the reaction for 1.5 hours after the addition is completed. and to pH=6. Add 40g of polymerized zirconium chloride with a molecular weight of 600-800 and a basicity of 50%-80% for compounding to obtain a mud inhibitor 3 for a composite polycarboxylate water reducer.

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Abstract

The invention discloses a preparing method for a mud stopping agent used for compound polycarboxylate superplasticizer. The preparing method includes the following steps that reaction monomer unsaturated alcohol or a derivative thereof, dimethyl diallyl ammonium chloride and water are selected and added into reaction equipment to prepare a reaction solution, or reaction monomer acrylamide or a derivative thereof, unsaturated alcohol or a derivative thereof, dimethyl diallyl ammonium chloride and water are selected and added into reaction equipment to prepare a reaction solution, the temperature of the reaction solution is adjusted to be 50 DEG C-60 DEG C, a copolymerization reaction is conducted for 3-4 h in a stirred mode under the action of an initiating agent, after the reaction is completed, the pH value of the reaction solution is adjusted by an alkaline solution to be 6-8, and then polymeric aluminum chloride or polymeric zirconium chloride is added for complexing to obtain the mud stopping agent used for the compound polycarboxylate superplasticizer. The problem that high-mud-content concrete is poor in usability is solved, and the prepared mud stopping agent is good in affinity with the polycarboxylate superplasticizer and can reduce the influence on the polycarboxylate superplasticizer by mud.

Description

technical field [0001] The invention belongs to the technical field of mud-repelling agents, and in particular relates to a preparation method of a mud-repelling agent for a composite polycarboxylate water reducer. Background technique [0002] Polycarboxylate superplasticizer is widely used in the construction industry due to its low dosage, high water reducing rate, good fluidity retention, good cement adaptability, and low content of harmful components. It is currently the mainstream product in the market. However, polycarboxylate superplasticizer is greatly affected by mud, which limits its development. [0003] In recent years, many people have successively published studies on the adaptability of polycarboxylate superplasticizers to mud. An effective idea is to add a component that can be closely adsorbed on the mud surface as a sacrificial agent to inhibit the migration of dispersed clay particles and reduce the impact of mud on polycarboxylate superplasticizers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F216/04C08F226/02C08F216/08C08F220/56C08F220/54C04B24/26
CPCC04B40/0039C04B2103/0068C08F216/04C08F220/54C08F226/02C08F216/08C08F220/56C04B24/2652C04B22/12C04B24/2688
Inventor 邓俊强黎凡宋婧林远煌李向涛
Owner 广东省建筑材料研究院有限公司
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