C80 ultrahigh pumping concrete and preparation method thereof

Abstract

The invention discloses C80 ultrahigh pumping concrete and a preparation method thereof. The C80 ultrahigh pumping concrete is prepared from the following raw materials in parts by weight: 270 to 310parts of cement, 690 to 720 parts of sand, 950 to 990 parts of broken stone, 240 to 260 parts of a mineral admixture, 8.5 to 10.5 parts of a polycarboxylate superplasticizer, 25 to 56 parts of graphite powder, 10 to 20 parts of coal gangue ultrafine powder, 0.0145 to 0.145 part of an air entraining agent, 2.4 to 2.6 parts of an exciting agent, and 135 to 147 parts of water. The preparation methodcomprises the following steps weighing the cement, the sand, the broken stone, the fly ash, the zeolite powder, the graphite powder, the mirabilite, the slaked lime and the coal gangue ultrafine powder in corresponding parts by weight, uniformly stirring and mixing to obtain a first mixture, uniformly mixing water, a water reducing agent and an air entraining agent, adding the mixture into the first mixture, and uniformly stirring to obtain the C80 ultrahigh pumping concrete. The C80 ultrahigh pumping concrete provided by the invention has the advantages that the strength is ensured, the fluidity is good, and the pumping is easy.

Description

technical field [0001] The invention relates to the concrete field, more specifically, it relates to a C80 ultra-high pumping concrete and a preparation method thereof. Background technique [0002] Ultra-high pumping concrete is successfully transported to the designated height of the building at one time through the pumping equipment. Therefore, the concrete must have good fluidity, high cohesion, water retention and anti-segregation bleeding performance. C80 concrete refers to compression Concrete with a strength between 80MPa and 85MPa is a kind of high-strength concrete. As a new building material, high-strength concrete has the advantages of high compressive strength, strong deformation resistance, high density and low porosity. It is widely used in high-rise building structures, long-span bridge structures and some special structures. [0003] The Chinese invention patent with the application publication number CN110183161A discloses a high-strength concrete mixture,...

AI Technical Summary

Problems solved by technology

[0004] The defects in the above technical solutions are: cement, slag powder and other cementitious materials will undergo hydration reaction during mixing with water, which will increase their viscosity and enhance their strength, but the increase in strength will reduce the fluidity of concrete; high performance concrete It is prone to large deformation during the pumping process, and its shear strength is very small, that is, the yield value is greater than the ultimate shear strength, so a large loss will occur in the process of overcoming the friction with the pipe wall and flowing

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