Low-carbon low-shrinkage ultra-high strength concrete and preparation method and application thereof

Abstract

The invention relates to low-carbon low-shrinkage ultra-high strength concrete and a preparation method and application thereof. The low-carbon low-shrinkage ultra-high strength concrete comprises 340-380 parts of cement, 50-90 parts of silicon powder, 140-170 parts of fly ash, 0-35 parts of waste rubber powder, 980-1100 parts of crushed stone, 580-680 parts of medium sand, 110-160 parts of tap water, 10-22 parts of a water reducing agent, 0-3.5 parts of fiber and 0-0.875 part of a coupling agent. According to the method, during preparation, first drying the medium sand in the sun; measuring various components in proportion, manually kneading the waste rubber powder, pouring the waste rubber powder into a stirring barrel, then uniformly stirring the water reducing agent, the coupling agentand water, pouring the water reducing agent, the coupling agent and the water into the stirring barrel, and stirring; pouring the cement, the silicon powder and the fly ash into the stirring barrel,and stirring; adding the crushed stone, and stirring; finally, adding the medium sand and the fiber, stirring and discharging. The low-carbon low-shrinkage ultra-high strength concrete is configured with lower single cement consumption, and effectively solves the problems of high-efficiency utilization of waste rubber powder resources, excessively high viscosity, excessively high self-constrictionand high brittleness of ultra-high strength concrete mixtures, thus achieving multiple benefits at one stroke.

Description

[0001] 【Technical Field】 [0002] The invention belongs to the technical field of building materials, and specifically refers to a preparation method and engineering application of low-carbon, low-shrinkage, and ultra-high-strength concrete. [0003] 【Background technique】 [0004] The main problems in the current construction industry are extensive development models, high consumption of construction resources, and outstanding carbon emissions. In order to implement the basic national policy of saving resources and protecting the environment, promote the transformation of economic development mode, realize the binding targets of energy saving and emission reduction, actively respond to global climate change, and build a resource-saving and environment-friendly society, the Ministry of Housing and Urban-Rural Development proposes to adhere to scientific development The basic principles of the promotion of green buildings and green building materials, comprehensively improve the level...

AI Technical Summary

Problems solved by technology

[0011] One of the technical problems to be solved by the present invention is to provide a method for preparing low-carbon, low-shrinkage, ultra-high-strength concrete with relatively low single-party cement consumption. The concrete prepared by this method can effectively solve the problem of efficient utilization of waste rubber powder resources, super Problems such as excessive viscosity of high-strength concrete mixture

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