Lightweight high-strength concrete

Abstract

The invention relates to the technical field of concrete and preparation thereof and in particular relates to lightweight high-strength concrete. The lightweight high-strength concrete is prepared from the following raw materials in parts by weight: 25-45 parts of fly ash, 15-35 parts of cement, 15-30 parts of fine sand, 5-12 parts of diatomite, 3-15 parts of light calcium carbonate, 3-12 parts ofaluminum polychloride, 15-48 parts of lightweight aggregate, 1-5 parts of reinforced fibers, 1-3 parts of a foaming agent, 1-5 parts of graphene oxide, 0.5-1.5 parts of a water reducing agent and 0-5parts of other aids. The lightweight high-strength concrete disclosed by the invention has the characteristics of light weight, high strength and excellent weather resistance, can meet concrete performance indexes in the construction industry and has excellent application prospects.

Description

technical field [0001] The invention relates to the technical field of concrete and its preparation, in particular to a lightweight high-strength concrete. Background technique [0002] In recent years, driven by building energy-saving policies, building energy-saving technologies and energy-saving materials have developed rapidly. Concrete is the most widely used building material in the construction industry. With the development of the economy and the advancement of technology, people's requirements for building materials are also constantly increasing. Not only does the concrete require high strength and durability, but the concrete should also meet the requirements of light weight and environmental protection. requirements. At present, the most common concrete used in industrial and civil buildings, although its strength (generally 20-30MPa) can basically meet the requirements of building structures, is relatively heavy. However, at present, ordinary concrete and aera...

AI Technical Summary

Problems solved by technology

At present, ordinary concrete is the most used in industrial and civil buildings. Although its strength (generally 20-30MPa) can basically meet the requirements of building structures, it is relatively bulky.

However, both ordinary concrete and air-entrained concrete are brittle materials at present, and it is easy to produce micro-cracks due to shrinkage, or even completely destroy them.

The strength of lightweight concrete on the market is very low (generally <5MPa), which cannot meet the requirements of building structures, and can only be used as non-load-bearing partition walls or insulation materials

In addition, air-entrained concrete is very brittle and easily broken during transportation and construction

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