Ultrahigh-toughness lightweight concrete based on ultrafine powder and preparation method thereof

Abstract

The invention discloses ultrahigh-toughness lightweight concrete based on ultrafine powder. The ultrahigh-toughness lightweight concrete is prepared from the following components in parts by weight: 600 to 750 parts of sulphoaluminate cement, 100 to 150 parts of ultrafine powder, 50 to 70 parts of silica fume, 75 to 100 parts of glass microspheres, 90 to 110 parts of expanded perlite, 5 to 10 parts of copper-plated microfilament steel fibers, 25 to 35 parts of a high-water-reduction viscosity-reduction type polycarboxylic acid water reducer and 220 to 250 parts of water, wherein the ultrafine powder is prepared by mixing carbide slag powder, fly ash and mineral powder as main raw materials. The ultrahigh-toughness lightweight concrete obtained by the invention can effectively consider light weight, high strength and ultrahigh toughness, can ensure high strength and high toughness while reducing self weight, and is suitable for the fields of super high-rise structures and the like; and the related preparation method is relatively simple, relatively low in cost and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to ultrafine powder-based ultrahigh toughness lightweight concrete and a preparation method thereof. Background technique [0002] Concrete is the largest man-made building material for human beings. Its inherent disadvantages are heavy weight and brittleness. Improving the brittleness of concrete and realizing lightweight and high-strength concrete is to improve the use efficiency of concrete materials, reduce the weight of structures, and save building material resources and energy. It is also one of the most effective technical approaches for concrete material science, and it is also the main goal of concrete material science basic theory research and application technology development. [0003] At present, ultra-high toughness concrete is developing rapidly abroad. It is used in special structures such as long-span bridges and anti-violence. Most of it is ...

AI Technical Summary

Problems solved by technology

[0003] At present, ultra-high toughness concrete is developing rapidly abroad. It is used in special structures such as long-span bridges and anti-violence. Most of it is in the research stage in China, and its application is seldom. However, its dead weight is still very large, at 2500kg / m 3 Above, in contrast to lightweight concrete, the self-weight can achieve 1400-1950kg / m 3 , but its strength is generally only about 30MPa

Such as: Liu Zengchen et al. researched and disclosed a high-strength lightweight aggregate concrete with a maximum strength of 71.3MPa and a bulk density of 1850kg / m 3 Huang Dongjie et al. researched and disclosed a kind of lightweight high-strength concrete, which mainly uses light aggregate soaked in sodium sulfate solution to prepare a strength of 63MPa lightweight aggregate concrete; all of which cannot effectively take into account light weight and high-strength performance