C90-grade self-compaction high-strength concrete and preparation method thereof

Abstract

The invention provides C90-grade self-compaction high-strength concrete and a preparation method thereof, and relates to a building material and a preparation method thereof. The C90-grade self-compaction high-strength concrete is prepared from the following materials in the following proportion: the ratio of cement to silicon ash to fly ash to stones to sand to water to a high-efficiency water reducing agent (unit Kg / m<3>) is (440-480) to (25-55) to (55-110) to (580-700) to (1100-1300) to (115-135) to (16-22). Compared with the prior art, a low-carbon environment-friendly architectural concept is integrated, the strength grade is very high and the working performance is good; and the C90-grade self-compaction high-strength concrete is particularly suitable for novel steel pipe high-strength concrete combined structures with limited inner spaces of steel pipes, such as pouring structural steel pipe concrete, hollow interlayer steel pipe concrete, steel pipe concrete overlapped members and dual steel pipe concrete and the like.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a C90 grade self-compacting high-strength concrete and a preparation method thereof. Background technique [0002] With the advancement of construction technology, building structures are developing towards long-span, high-rise and even super-high-rise. In CFST structures, if the strength of concrete is too low, the concrete will be crushed before the steel yields, and the CFST cannot be fully utilized. However, restricted by many factors, the structural size cannot be increased with the increase of the structural load, so that there is difficulty in concrete vibration during the construction process, especially in the new steel tube high-strength concrete composite structure where the internal space of the steel tube is limited. , it is easy to cause voids, air bubbles and cracks in the structure due to insufficient vibration, which not only fails to exert...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of construction technology, building structures are developing towards long-span, high-rise and even super-high-rise. In CFST structures, if the strength of concrete is too low, the concrete will be crushed before the steel yields, and the CFST cannot be fully utilized. However, restricted by many factors, the structural size cannot be increased with the increase of the structural load, so that there is difficulty in concrete vibration during the construction process, especially in the new steel tube high-strength concrete composite structure where the internal space of the steel tube is limited. , it is easy to cause voids, air bubbles and cracks in the structure due to insufficient vibration, which not only fails to exert the excellent mechanical properties of steel and concrete structures, but also has a greater impact on the safety of the structure. Dense high-strength concrete can solve these problems well