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Mud-resistant polycarboxylate superplasticizer

A technology of water reducing agent and polycarboxylic acid, which is applied in the design and manufacture of concrete admixtures, can solve the problems of high mud content in sand and gravel materials and cannot use polycarboxylic acid water reducing agent, etc., achieves high dispersing ability, inhibits adsorption , the effect of high collapse retention performance

Inactive Publication Date: 2015-02-25
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-mud polycarboxylate superplasticizer, which can effectively solve the problem that polycarboxylate superplasticizers cannot be used due to the high mud content of sand and gravel materials caused by dusty weather in southern Xinjiang

Method used

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Embodiment 1

[0007] Embodiment 1. A mud-resistant polycarboxylate water reducer, the water reducer is prepared from the following materials according to the weight ratio: 60 parts of polyethylene glycol dimethacrylate, lauryl 20 parts of sodium benzenesulfonate, 10 parts of maleic anhydride, 1-3 parts of thiourea, 5 parts of potassium permanganate, 5 parts of chain transfer agent mercaptopropanol, 150 parts of deionized water and 5 parts of 30% sodium hydroxide The carboxylic acid derivative is maleic anhydride or acrylic acid; the chain transfer agent is one of mercaptopropanol, mercaptoethanol, mercaptoacetic acid and isopropanol.

[0008] Preparation method: Add 60 parts of polyethylene glycol dimethacrylate and 150 parts of deionized water into the reaction kettle, stir and heat up to 80±2°C, after completely dissolving, add 20 parts of sodium dodecylbenzenesulfonate and 10 parts of maleic anhydride, continue to stir for 20 minutes, add 1 part of thiourea after complete dispersion, dro...

Embodiment 2

[0009] Embodiment 2. A mud-resistant polycarboxylate water-reducer, the water-reducer is prepared from the following materials in proportions by weight: 90 parts of polyethylene glycol dimethacrylate, lauryl 40 parts of sodium benzenesulfonate, 15 parts of acrylic acid, 3 parts of thiourea, 15 parts of potassium permanganate, 15 parts of chain transfer agent mercaptoethanol, 263 parts of deionized water and 15 parts of 30% sodium hydroxide; The compound is maleic anhydride or acrylic acid; the chain transfer agent is one of mercaptopropanol, mercaptoethanol, mercaptoacetic acid and isopropanol.

[0010] Preparation method: Add 90 parts of polyethylene glycol dimethacrylate and 263 parts of deionized water into the reaction kettle, stir and heat up to 80±2°C, after completely dissolving, add 40 parts of sodium dodecylbenzenesulfonate and 15 parts of acrylic acid, continue to stir for 20 minutes, add 3 parts of thiourea after complete dispersion, dropwise add 15 parts of potassi...

Embodiment 3

[0011] Embodiment 3. A mud-resistant polycarboxylate water reducer, the water reducer is prepared from the following materials according to the ratio of parts by weight: 75 parts of polyethylene glycol dimethacrylate, lauryl 30 parts of sodium benzenesulfonate, 13 parts of maleic anhydride, 2 parts of thiourea, 10 parts of potassium permanganate, 10 parts of chain transfer agent thioglycolic acid, 214 parts of deionized water and 10 parts of 30% sodium hydroxide; The carboxylic acid derivative is maleic anhydride or acrylic acid; the chain transfer agent is one of mercaptopropanol, mercaptoethanol, mercaptoacetic acid and isopropanol.

[0012] Preparation method: Add 75 parts of polyethylene glycol dimethacrylate and 214 parts of deionized water into the reaction kettle, stir and heat up to 80±2°C, after completely dissolving, add 30 parts of sodium dodecylbenzenesulfonate and 13 parts of maleic anhydride, continue to stir for 20 minutes, add 2 parts of thiourea after complete...

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Abstract

The invention belongs to the technical field of design and manufacture of concrete admixtures and particularly relates to mud-resistant polycarboxylate superplasticizer. The mud-resistant polycarboxylate superplasticizer is made of, by weight, 60-90 parts of polyethylene glycol dimethacrylate, 20-40 parts of sodium dodecyl benzene sulfonate, 10-15 parts of carboxylic acid derivatives, 1-3 parts of thiocarbamide, 5-15 parts of potassium permanganate, 5-15 parts of chain transfer agent, 150-263 parts of deionized water and 5-15 parts of 30% sodium hydroxide. Concrete prepared from the polycarboxylate superplasticizer made according to the method is excellent in slump constant keeping capability and wide in mud content application range of sand and gravel materials, and concrete construction in southern Xinjiang is technically guaranteed.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of concrete admixtures, and in particular relates to a mud-resistant polycarboxylate water reducer. Background technique [0002] Compared with naphthalene-based, aliphatic, sulfonated melamine and other water-reducing agents, the advantages of polycarboxylate-based water-reducing agents are: good slump retention; under the same fluidity, it has little effect on the setting time of cement and can Effectively solve the problems of water reduction, air entrainment, retardation, and bleeding; more slag or fly ash can be used to replace cement, thereby reducing costs; no harmful substances such as formaldehyde and naphthalene are used, and no pollution to the environment, etc. etc.; at the same time, compared with other water reducers, polycarboxylate water reducers have higher requirements for aggregate mud content, and the water reducing rate of polycarboxylate water reducers decrease...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F222/06C08F220/06C08F4/40C08F2/38C04B24/26C04B103/30
Inventor 宋勇曾凡付杨泰山唐倩倩
Owner XINJIANG DELAND
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