A kind of self-compacting steel tube concrete and preparation method thereof

Abstract

The present invention provides a self-compacting steel pipe concrete and a preparation method thereof, wherein each cubic concrete comprises the following raw materials by mass: 290-330 kg of cement, 70-100 kg of fly ash, 120-160 kg of blast furnace slag powder, 163.5-175 kg of red brick powder, 170-185 kg of water, 745-800 kg of sand, 726.5-775 kg of gravel, 3.5-4.2 kg of a water reducer, 0.096 kg of a toughening agent, and 0.96-1.18 kg of SAP. According to the present invention, the prepared self-compacting steel pipe concrete can achieve the effects of self-leveling and self-compacting, can ensure the inner curing effect of the steel pipe concrete at the low economic cost, can solve the concrete cracking problem caused by the drying shrinkage of the concrete, and can improve the durability and the workability of the steel pipe concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-compacting steel pipe concrete and a preparation method thereof. Background technique [0002] Concrete-filled steel tubes have been widely used in various projects such as buildings and bridges due to their structural advantages and good workability and performance. The difficulty of concrete filled steel pipe lies in the pouring method and vibration process. It is necessary to solve the self-compacting of the concrete in the tube and the tight hoop between the core concrete and the steel tube. This requires the core concrete to be self-leveling and have good working performance. expansion properties. Since the core concrete is mostly high-strength concrete with a low water-to-binder ratio, active mineral admixtures such as granulated blast furnace slag, silica fume, and fly ash are widely used, and their secondary hydration reactions further incre...

AI Technical Summary

Problems solved by technology

Since the core concrete is mostly high-strength concrete with a low water-to-binder ratio, active mineral admixtures such as granulated blast furnace slag, silica fume, and fly ash are widely used, and their secondary hydration reactions further increase the internal water consumption of concrete. , so that the lack of moisture seriously affects the internal hydration reaction of concrete in the later stage of hardening, which will adversely affect the strength development and durability of concrete in the later stage

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