C60 ultrahigh pumping concrete

Abstract

The invention relates to C60 ultrahigh pumping concrete. The C60 ultrahigh pumping concrete is prepared from the following raw materials in parts by weight: 350 to 370 parts of P.O42.5-grade cement, 66 to 74 parts of S95 mineral powder, 48 to 52 parts of F(I) coal ash, 75 to 85 parts of high-performance mineral admixture, 725 to 765 parts of sand, 930 to 970 parts of 5 to 20 mm particle-size gravel, 8.0 to 9.0 parts of additives, and 151 to 163 parts of water. The concrete not only has good mobility, but also meets the strength requirement of C60 concrete; and the internal heat conduction efficiency of the pouring molded concrete is high, the surface of the concrete in the hardening process hardly has a crack, and the safety potential hazard is reduced.

Description

Technical field [0001] The invention relates to the field of ultra-high pumping concrete, and more specifically, it relates to a C60 ultra-high pumping concrete. Background technique [0002] Ultra-high pumping concrete technology refers to modern concrete pumping technology with a pumping height of more than 200m. For super high-rise buildings, the concrete that constitutes the super high-rise building needs to have a higher strength, so high-strength super-high-rise pumping concrete requires a large amount of cement and has a high strength level. [0003] Due to the large amount of concrete required for pouring, a large amount of heat of hydration will be generated during concrete hydration during the hardening process, and the higher the strength level, the greater the heat of hydration, and the temperature inside the concrete will rise sharply. Because concrete is a poor conductor of heat, the temperature inside the concrete is difficult to transfer to the surface of the concr...

AI Technical Summary

Problems solved by technology

Since concrete is a poor conductor of heat, it is difficult for the temperature inside the concrete to be transferred to the concrete surface, while the surface of the concrete dissipates heat quickly, and the temperature difference between the inside and outside of the concrete structure layer is large, and the large temperature difference causes the shrinkage rate of the inside and outside of the concrete to be different. Cracks appear on the concrete surface, a safety hazard

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