Super high-rise pump concrete and preparation method thereof

Abstract

The invention discloses super high-rise pump concrete and a preparation method thereof. The super high-rise pump concrete comprises the components: silicic acid cement, ground granulated blast furnaceslag powder, fly ash, micro-bead powder, water, a fine aggregate, a coarse aggregate, an anionic surfactant and an additive. The preparation method comprises the steps: weighing a certain amount of the silicic acid cement, ground granulated blast furnace slag powder, fly ash, micro-bead powder, water, fine aggregate, coarse aggregate, anionic surfactant and polycarboxylic acid high-performance water reducer for later use, and mixing the silicic acid cement, ground granulated blast furnace slag powder, fly ash, micro-bead powder, water, fine aggregate, anionic surfactant and polycarboxylic acid high-performance water reducer together; and after stirring with a stirrer, adding the coarse aggregate and stirring again until the specified slump is reached, and discharging. By improving the formula of the concrete, when the concrete is pumped to a super high-rise building, the pumping difficulty is reduced, meanwhile, the rated strength grade of the concrete is enhanced, and the strength easily meets the design requirement.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a super high-rise pumped concrete and a preparation method thereof. Background technique [0002] Buildings with a building height of more than 100m are called super high-rise buildings, and concrete with a strength grade of not less than C60 is called high-strength concrete. Compared with ordinary strength concrete, high-strength concrete has the advantages of reducing structural section, reducing the amount of steel bars, increasing the usable area and effective space of the house, and reducing the load of the foundation. Its impermeability, frost resistance, carbonation resistance, corrosion resistance and The impact resistance and other aspects of performance are also superior to ordinary strength grade concrete. On the other hand, high-strength concrete also has the characteristics of many cementitious materials, small water-binder ratio, large expansion, and l...

AI Technical Summary

Problems solved by technology

On the other hand, high-strength concrete also has the characteristics of many cementitious materials, small water-binder ratio, large expansion, and long pouring time. Therefore, when pumping high-strength concrete, the viscosity is high, which leads to high pressure during pumping, which increases the difficulty of pumping construction. problems, especially for super high-rise pumping high-strength concrete

Generally speaking, as the height of the building increases, the corresponding design strength level of the concrete required is also decreasing, and it is difficult to meet or even fail to meet the design strength requirements.