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Polycarboxylate type water reducing agent for concrete and preparation method thereof

A technology of polycarboxylate and concrete, applied in the field of concrete admixture

Inactive Publication Date: 2018-07-27
长沙小新新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polycarboxylate water reducer for concrete and its preparation method to solve the problems in the Chinese patent document "A polycarboxylate high performance water reducer and its preparation method (patent number: ZL 201210274917.1) "On the basis of publicity, how to optimize the components, dosage, preparation methods, etc., to improve the slump, water reducing rate and compressive strength of concrete

Method used

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  • Polycarboxylate type water reducing agent for concrete and preparation method thereof
  • Polycarboxylate type water reducing agent for concrete and preparation method thereof

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preparation example Construction

[0027] The preparation method of the polycarboxylic acid water reducer for concrete includes the following steps:

[0028] S1: Take sodium rosinate and phenol in proportion, add sodium hydroxide with a concentration of 20-40% and mix well, adjust the pH to 8.5-10, react at 80-90°C for 1-2h to prepare an initiator solution;

[0029] S2: Dissolve fumaric acid, acrylic acid, polyethylene glycol sodium stearate, sodium methallyl sulfonate and mercaptoethanol in deionized water to prepare an unsaturated sodium carboxylate mother liquor, the dissolution temperature is 60- 80°C;

[0030] S3: In a glass reaction device equipped with a thermometer, agitator, a peristaltic pump dropping device, a nitrogen introduction tube and a reflux cooling device, add deionized water and heat to 55-60°C, and then add methylene according to the raw material ratio Base polyoxyethylene ether, methoxy polyethylene glycol methacrylate, stir and heat to 70-80 ℃ until all dissolved, then add potassium peroxodisu...

Embodiment 1

[0033] A polycarboxylic acid water reducer for concrete, in parts by weight, comprising the following raw materials: 45 parts of methylalkenyl polyoxyethylene ether, 41 parts of methoxy polyethylene glycol methacrylate, and fumaric acid 23 parts, 18 parts of acrylic acid, 25 parts of sodium methallylsulfonate, 1.3 parts of mercaptoethanol, 4.6 parts of potassium peroxodisulfate, 3.5 parts of azobisisobutyronitrile, 1.5 parts of polyethylene glycol sodium stearate, 1 part of sodium rosin and 0.8 part of phenol.

[0034] The preparation method of the polycarboxylic acid water reducer for concrete includes the following steps:

[0035] S1: Take sodium rosinate and phenol in proportion, add 30% sodium hydroxide and mix well, adjust the pH to 9, and react at 90°C for 1 hour to prepare an initiator solution;

[0036] S2: Dissolve fumaric acid, acrylic acid, polyethylene glycol sodium stearate, sodium methallyl sulfonate and mercaptoethanol in deionized water to prepare an unsaturated sodi...

Embodiment 2

[0040] A polycarboxylic acid water-reducing agent for concrete, in parts by weight, comprising the following raw materials: 60 parts of methylalkenyl polyoxyethylene ether, 36 parts of methoxy polyethylene glycol methacrylate, and fumaric acid 20 parts, 15 parts of acrylic acid, 22-28 parts of sodium methallyl sulfonate, 1.6 parts of mercaptoethanol, 3.5 parts of potassium peroxodisulfate, 3.2 parts of azobisisobutyronitrile, 1.2 parts of polyethylene glycol sodium stearate Parts, 0.8 part of sodium rosinate, 0.5 part of phenol.

[0041] The preparation method of the polycarboxylic acid water reducer for concrete includes the following steps:

[0042] S1: Take sodium rosinate and phenol in proportion, add 20% sodium hydroxide and mix well, adjust the pH to 8.5, react at 85°C for 2h to prepare an initiator solution;

[0043] S2: Dissolve fumaric acid, acrylic acid, polyethylene glycol sodium stearate, sodium methallyl sulfonate and mercaptoethanol in deionized water to prepare an uns...

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Abstract

The invention discloses a polycarboxylic acid type water reducing agent for concrete and belongs to the technical field of concrete additives. The water reducing agent is prepared from the following raw materials: methyl vinyl polyoxyethylene ether, methoxy polyethylene glycol methacrylate, fumaric acid, acrylic acid, sodium methallylsulphonate, mercaptoethanol, potassium peroxydisulfate, 2,2'-azobisisobutyronitrile, polyethylene glycol sodium stearate, sodium rosinate and phenol. According to the polycarboxylic acid type water reducing agent, a reinforcing system is formed by utilizing the polyethylene glycol sodium stearate, sodium rosinate and phenol and cooperatively improves the slump degree, water reduction rate and compressive strength of the concrete.

Description

Technical field [0001] The invention belongs to the technical field of concrete admixtures, and specifically relates to a polycarboxylic acid water reducer for concrete and a preparation method thereof. Background technique [0002] The explanation of concrete water-reducing agent can be divided into two aspects. One is that under the condition that the concrete is easy to construct and the amount of cement remains stable, it can reduce the amount of mixing water and increase the strength of concrete at the same time. Under the premise of the same workability and strength, the amount of cement can be saved after mixing. In the actual mixing process of concrete, the effect of concrete water reducing agent is prominent and becomes indispensable. Concrete water reducing agent can be used alone or combined with other functional components. According to the "Concrete Admixtures" standard (GB 8076-2008), based on the difference in water reducing rate, water reducing agents can be divi...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/30
CPCC04B40/0039C04B2103/302C04B24/32C04B24/26C04B24/04C04B24/16C04B24/02C04B22/14C04B24/00C04B24/129
Inventor 不公告发明人
Owner 长沙小新新能源科技有限公司
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