Efficient retarding and water reducing agent for concrete

Abstract

The present invention relates to one kind of efficient retarding and water reducing agent for concrete suitable for commercial concrete, pumped concrete and bulk concrete. The efficient retarding and water reducing agent consists of water reducing agent 0-90 wt%, retarder I 1-15 wt%, retarder II 0.5-25 wt% and shrinkage reducing agent 0.05-0.2 wt%. The efficient retarding and water reducing agent has simple preparation process, and has the effects of delaying the setting of concrete, raising early strength, reducing water, etc.

Description

1. Technical field

[0001] The invention relates to a retarding high-efficiency water reducer for concrete, which is suitable for commercial concrete, pumped concrete and mass concrete, and belongs to the field of building materials. 2. Background technology

[0002] In the current large-scale engineering construction, not only modern construction technology and construction methods are required, but also multi-functional performance requirements are put forward for concrete. For example, pumping concrete in high-rise buildings and transporting concrete over long distances requires the concrete to have a large flow state and retardation in order to maintain its good working performance; Temperature stress cracks require concrete to have low heat of hydration, slow heat release, and concrete retardation; and in different projects, according to different needs, concrete is required to have early strength or strength at various ages, etc. All of these concrete The improvement a...