Polycarboxylate superplasticizer and preparation method thereof
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A technology of water reducing agent and polycarboxylic acid, which is applied in the field of concrete, can solve problems such as the impact of water reducing agent on the mud content of concrete, achieve high conversion rate, increase adaptability, and reduce adsorption effects
Pending Publication Date: 2021-04-27
HUNAN ZHONGYAN BUILDING MATERIAL TECH CO LTD
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Therefore, the present invention provides a polycarboxylate water reducer and its preparation method to solve the problem that the existing water reducer is easily affected by the mud content of concrete
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[0049] In this example, referring to the preparation method of the water reducer, a polycarboxylate water reducer is prepared, which contains:
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Abstract
The invention provides a polycarboxylate superplasticizer and a preparation method thereof, and aims to solve the problem that the existing superplasticizer is easily influenced by the mud content of concrete. The polycarboxylate superplasticizer is prepared from the following raw materials: mono6-glycidyl methacrylate-ethanolamine-beta-cyclodextrin, ethylene glycol monovinyl polyethylene glycol ether, acrylic acid, an oxidizing agent, a reducing agent, a chain transfer agent, a first pH regulator and water. The polycarboxylate superplasticizer disclosed by the invention is not easily influenced by the mud content of concrete in the use process, and takes a redox system as an initiating system, so that the reaction speed is controlled through the dropping speed in the preparation process, a polymerization reaction process without temperature control at normal temperature can be realized, and energy and cost can be saved.
Description
technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] With the rapid development of infrastructure, the demand for concrete has increased sharply, which has also accelerated the development of concrete admixtures. Among the concrete admixtures, the water reducing agent is very important to the concrete. The performance of the water reducing agent directly affects the performance of concrete transportation, pumping, constructability and later strength. As the third generation of water reducer, polycarboxylate water reducer has higher water reducing rate and slump retention than the previous two generations of water reducers, i.e. lignosulfonate water reducer and Cai series water reducer. Good, low shrinkage, strong molecular structure design, green and environmental protection, etc., it is widely used in concrete. [0003] ...
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