Efficient concrete composite water reducing agent and application thereof

Abstract

The invention provides an efficient concrete composite water reducing agent which consists of the following components in parts by weight: 10-40 parts of a polycarboxylic acid mother liquid, 4-15 parts of an air entraining agent, 15-30 parts of lyophilic colloid, 0.1-1 part of a retarder, 0.8-2 parts of mirabilite, 1-5 parts of calcium lignosulphonate, 5-20 parts of a cellulose water retaining material and 30-70 parts of water. The efficient concrete composite water reducing agent is applied to preparation of concrete, the mass ratio of the efficient concrete composite water reducing agent to the concrete is (0.0001-0.1):(20-300). The efficient concrete composite water reducing agent has properties such as slow release, collapse prevention, high early strength and water retention, is capable of greatly reducing the unit water consumption of the concrete, improving the density of the concrete, greatly reducing the amount of cement, reducing the shrinkage and improving the stability of the concrete, has the characteristics of being low in doping quantity and remarkable in effect when being used in the concrete, in addition is environment-friendly, and has very good economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-efficiency composite water reducer for concrete and its application. Background technique [0002] Concrete water reducer refers to an admixture that can reduce the amount of mixing water and improve the strength of concrete under the condition that the workability of concrete and the amount of cement remain unchanged; through surface activity, complexation, electrostatic repulsion or three-dimensional repulsion, etc. To hinder or destroy the flocculation structure of cement particles, so as to save the amount of cement while ensuring the workability and strength of concrete. Concrete admixtures, referred to as admixtures for short, refer to substances that are added to improve the performance of concrete before or during the mixing of concrete. Because admixtures can effectively improve the performance of concrete and have good economic benefits, they have bee...

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Problems solved by technology

[0003] However, the water reducing agents currently used in the market have the disadvantages of large dosage, poor water reducing performance, and poor plasticizing effect, and have single functions, but they do not have the properties of retardation, slump retention, water retention, and early strength. Did not achieve real cost reduction and efficiency increase, unable to meet market requirements

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