Super high-rise jacking self-compacting concrete and construction process thereof

Abstract

The invention relates to the field of building materials, and particularly discloses super high-rise jacking self-compacting concrete and a construction process thereof. The super high-rise jacking self-compacting concrete is prepared from the following components in parts by weight: 395 to 434 parts of cement, 46 to 68 parts of fly ash, 65 to 98 parts of slag powder, 9.7 to 15 parts of silica fume, 12.1 to 17.6 parts of an additive, 165 to 188 parts of water, 0 to 324 parts of river sand, 570 to 842 parts of machine-made sand and 821 to 861 parts of pebbles, wherein the content of mountain flour in the machine-made sand is less than or equal to 12%. The construction process comprises the following steps: S1, preparing the concrete; S2, transporting and pumping the concrete; and S3, curing. The super high-rise jacking self-compacting concrete disclosed by the invention has the advantages of high workability, high homogeneity, low loss within 3 hours, high crack resistance, high impermeability and strong carbonization resistance.

Description

technical field [0001] This application relates to the field of building materials, more specifically, it relates to a super high-rise jacking self-compacting concrete and its construction technology. Background technique [0002] With the deepening of theoretical research on architectural science and the emergence of new construction techniques, there are more and more high-rise and super high-rise buildings. Super high-rise building structures (core tube shear walls, steel pipe columns, etc.) Due to the characteristics of being narrow and small, the vibrating rod cannot pass through the narrow gap to vibrate fully. Therefore, it is necessary for the concrete not only to meet the ultra-high pumpability, but also to meet the self-compacting property. [0003] There are usually two construction techniques for super high-rise concrete, one is high-throwing construction, and the other is jacking construction. Considering construction progress, operational safety, and self-compa...

AI Technical Summary

Problems solved by technology

However, the surface of the machine-made sand is rough, sharp, and angular, and there are many microcracks inside the machine-made sand particles, and the specific surface area is large, which easily makes the concrete poor in fluidity, high in viscosity, and high in pumping resistance.

[0005] In view of the related technologies mentioned above, the inventor believes that the use of machine-made sand in super high-rise jacking self-compacting concrete will easily lead to high viscosity, poor fluidity and high pumping resistance

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