Method for preparing low-shrinkage concrete from bagasse ash

Abstract

The invention belongs to the technical field of concrete preparation, and particularly relates to a method for preparing low-shrinkage concrete from bagasse ash. The method comprises the following steps: calcining and grinding recycled bagasse ash, and carrying out chemical part analysis and performance characterization on the calcined and ground bagasse ash. The bagasse ash is used for replacing cement according to a certain proportion and is mixed with cement, water, natural fine aggregate and natural coarse aggregate according to a certain proportion, and the low-shrinkage concrete with the performance meeting requirements is prepared. When bagasse is calcined at a certain temperature, bagasse ash contains a large amount of amorphous oxide, is internally porous and can be used as an auxiliary cementing material to replace cement, green high-performance concrete is prepared, and self-constriction of the concrete is reduced. Therefore, the method provided by the invention not only can reduce the self-constriction of the concrete, but also can reduce the emission of carbon dioxide, save land and protect the environment.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a method for preparing low-shrinkage concrete by using bagasse ash. Background technique [0002] The annual output of cement in my country is about 2.3 billion tons, and every ton of cement clinker used produces about 0.866 tons of carbon dioxide emissions, which account for about 9% of the country's total emissions. In order to achieve the goal of "strive to reach the peak of carbon dioxide emissions before 2030 and strive to achieve carbon neutrality before 2060", carbon emissions can be reduced by adding auxiliary cementitious materials instead of cement. At the same time, my country is a large agricultural country, which produces a large amount of agricultural solid waste every year, of which the annual output of bagasse is about 200,000 tons, and the bagasse is often disposed of by incineration or landfill. Disposal of bagasse by incineration or la...

AI Technical Summary

Problems solved by technology

However, due to the small particle size of rice husk ash, the pore size of the concrete is optimized, which also increases the self-shrinkage of the concrete, which leads to the early cracking of the concrete

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