Reduced slushing agent for building concrete

A technology for concrete and water reducing agent, applied in the field of building decoration, can solve the problems of large slump loss of concrete, can not meet engineering requirements, affect concrete performance, etc., and achieve the effects of excellent comprehensive performance, increased strength, and good slump retention.

CN102964529AInactive Publication Date: 2013-03-13CHINA CHANGSHU CONSTR GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-03-13
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a reduced slushing agent for building concrete, which is a high-efficiency polycarboxylate slushing agent. The reduced slushing agent for building concrete is prepared through adding maleic anhydride, diethylene glycol monobutyl ether, tertiary butanol and a catalyst into water firstly; then, heating the obtained mixture to 120 DEG C, carrying out heat preservation 4 hours, and cooling the obtained mixture to 80 DEG C; adding an initiator, a methacrylic acid and isoamyl alcohol polyoxyethylene ethers into the obtained mixture; continuing to carry out heat preservation 2 hours, and cooling the obtained solution to 35 DEG C; and neutralizing the obtained solution by using a neutralizing agent until the PH value of the obtained solution is 7-8. Through the way, the reduced slushing agent for building concrete disclosed by the invention can effectively improve the water reducing rate and dispersity of the slushing agent, and increase the strength of concrete, so that the concrete is excellent in slump retaining property, fluidity and crack resistance; and the slushing agent has a good compatibility with concrete.
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Description

technical field

[0001] The invention relates to the technical field of architectural decoration, in particular to a shrinkage-reducing water reducer for architectural concrete. Background technique

[0002] Cracking caused by shrinkage of concrete will greatly reduce the strength and durability of concrete, thereby shortening the service life of concrete. Concrete water reducer is one of the technical ways to reduce the amount of cement, improve the utilization rate of industrial waste residue, and realize the durability and high performance of concrete. It is also one of the key materials to make concrete develop into a high-tech field.

[0003] At present, my country's concrete water reducers mainly include high-efficiency water reducers such as naphthalene, sulfamate, and melamine. The most commonly used is lignosulfonate superplasticizer, which is cheap, but its water reducing rate is low, only 8%-10%, and it has a certain retarding and air-entraining effect. Overdosing...

Examples

Embodiment Construction

[0010] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0011] Embodiments of the invention include:

[0012] A shrinkage-reducing water-reducing agent for building concrete is a polycarboxylate-based high-efficiency water-reducing agent. The shrinkage-reducing water-reducing agent for building concrete is first added to water with maleic anhydride, diethylene glycol Butyl ether, tert-butanol and catalyst, then heated to 120°C, kept warm for 4 hours and then cooled to 80°C, then added initiator, methacrylic acid and isopentenol polyoxyethylene ether, then continued to keep warm for 2 hours and then cooled to 35 °C, neutralize the solution with a neutralizing agent until the pH value is 7-8.

[0013] Wherein, the solid content of the shrinkage-reduci...