Method for preparing light high-strength concrete

Abstract

The invention relates to the technical field of concrete and preparation and particularly relates to a method for preparing light high-strength concrete. The method for preparing the light high-strength concrete comprises the following steps: uniformly mixing the following components in parts by weight: 25-45 parts of coal ash, 15-35 parts of cement, 15-30 parts of fine sand, 5-12 parts of kieselguhr, 3-15 parts of light calcium carbonate, 3-12 parts of polymeric aluminum, 15-48 parts of lightweight aggregate, 1-5 parts of a reinforced fiber and 1-5 parts of graphene oxide under a mechanical stirring condition so as to obtain a mixture; further uniformly mixing with a water reduction agent, aids and a foaming agent, and performing pressing molding, so as to obtain a concrete test sample. The light high-strength concrete prepared by using the method provided by the invention has the characteristics of being light in weight, high in strength and good in weather resistance, index requirements on properties of concrete of the building industry can be met, and a relatively good application prospect can be achieved.

Description

technical field [0001] The invention relates to the technical field of concrete and its preparation, in particular to a preparation method of 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, ordi...

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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