C30 high performance concrete and preparation method thereof

Abstract

The invention relates to a C30 high performance concrete. The C30 high performance concrete is prepared from the following raw materials in parts by weight: 220 to 240 parts of P.O42.5 grade cement, 90 to 110 parts of S95 grade mineral powder, 85 to 95 parts of F (I) coal ash, 810 to 836 parts of sand, 965 to 995 parts of gravel with grain size being 5 to20 millimeters, 160 to 180 parts of water and 7.7 to 9.1 parts of admixture. The concrete not only has good flowing performance and meets strength of the C30 concrete, and meanwhile, heat of interior of horizontal floor is consumed in time, temperature difference between inside and outside of the horizontal floor is reduced, and surface cracks of the concrete in hardening process hardly exists.

Description

technical field [0001] The invention relates to the field of high-performance concrete, more specifically, it relates to a C30 high-performance concrete and a preparation method thereof. Background technique [0002] The concrete that constitutes a high-rise building usually needs to have a high strength grade and good pumpability, that is, flow performance. However, in the actual construction process, the horizontal floor of a high-rise building is usually poured with concrete with a strength standard of C30. Use strength, reduce construction cost. [0003] However, during the cement hydration process of poured concrete, due to the large area of ​​the poured horizontal slab, the temperature on the surface of the horizontal slab drops rapidly, and the temperature inside the horizontal slab rises sharply. The heat inside the concrete cannot be consumed and accumulates inside the concrete. . With the hydration process of cement, the temperature difference between the inside ...

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Problems solved by technology

[0003] However, during the cement hydration process of poured concrete, due to the large area of ​​the poured horizontal slab, the temperature on the surface of the horizontal slab drops rapidly, and the temperature inside the horizontal slab rises sharply. The heat inside the concrete cannot be consumed and accumulates inside the concrete.

With the hydration process of cement, the temperature difference between the inside and outside of the horizontal floor increases, and the large temperature difference causes the shrinkage rate of the concrete inside and outside to be different, causing cracks on the concrete surface and potential safety hazards

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