Self-compacting concrete prepared through condensation polymerization type-copolymerization type composite water reducing agent

Abstract

The present invention discloses a self-compacting concrete prepared through a condensation polymerization type-copolymerization type composite water reducing agent. The self-compacting concrete comprises 280 kg / m<3> of cement, 840 kg / m<3> of sand, 840 kg / m<3> of stone with a particle size of 5-20 mm, 280 kg / m<3> of grade-I fly ash, 175 kg / m<3> of water, and 4.8 kg / m<3> of a condensation polymerization type-copolymerization type composite water reducing agent, wherein the condensation polymerization type-copolymerization type composite water reducing agent is formed by compounding a naphthalene water reducing agent and a polycarboxylic acid slump-retaining agent according to a ratio of 3:2. The self-compacting concrete of the present invention has the following advantages that: 1, the improved polycarboxylic acid slump-retaining agent has good water reducing effect and good plastic retaining effect; 2, the composite water reducing agent doped concrete provides the better workability compared with the concrete simply doped with the naphthalene water reducing agent; 3, the project trial results show that the self-compacting concrete of the present invention has characteristics of excellent mechanical properties, high volume stability, and high durability; and 4, the component ratio is scientific and rational, and the performance and the effect are satisfactory.

Description

technical field [0001] The invention relates to concrete, in particular to a self-compacting concrete prepared by polycondensation-copolymerization composite water reducer. Background technique [0002] Self-compacting concrete is able to flow and compact by its own weight, free to fill every corner of the formwork without vibrating, and obtain naturally dense concrete. At present, water-reducing agents and slump-retaining agents are added to self-compacting concrete to increase the high workability, high volume stability, and high durability of the concrete. However, the existing self-compacting concrete has poor effects of adding water-reducing agents and slump-retaining agents, and the mixing ratio of the components is not scientific and reasonable, resulting in unsatisfactory performance and effect of the final product. Contents of the invention [0003] The purpose of the present invention is to provide a self-compacting concrete prepared by polycondensation-copolyme...

AI Technical Summary

Problems solved by technology

However, due to the poor effect of the water reducing agent and slump retaining agent added in the existing self-compacting concrete, and the mixing ratio of the components is not scientific and reasonable, the performance and effect of the final product are not ideal.