High-performance concrete with C80 strength grade, and preparation method of high-performance concrete

Abstract

The invention relates to the field of concrete, and particularly discloses C80 strength grade high-performance concrete and a preparation method thereof. The C80 strength grade high-performance concrete comprises the following components by weight: 100-160 parts of water, 300-400 parts of Portland cement, 550-620 parts of sand, 950-1200 parts of broken stone, 25-35 parts of silicon powder, 90-120parts of a mineral admixture, 2-6 parts of a polycarboxylate superplasticizer, and 12-25 parts of a filler, wherein the filler is prepared from the following raw materials in parts by weight: 3-6 parts of polyvinyl alcohol resin, 4-7 parts of water, 0.5-1 part of a defoaming agent, 1.5-3 parts of fumed silica, 0.8-2 part of starch and 1.2-3 parts of zeolite powder. The preparation method comprisesthe following steps: 1, preparing a filler; and 2, uniformly mixing Portland cement, sand and gravel, and adding water, silicon powder, a mineral admixture, the filler and a polycarboxylate superplasticizer while stirring. The concrete prepared by the invention meets the index of the C80 strength grade, and is relatively strong in impermeability and carbonization resistance and excellent in impact resistance.

Description

technical field [0001] The application relates to the field of concrete, more specifically, it relates to a high-performance concrete of C80 strength grade and a preparation method thereof. Background technique [0002] Concrete is one of the most important civil engineering materials today. It is composed of cementitious materials, granular aggregates (also known as aggregates), water and, if necessary, admixtures and admixtures prepared in a certain proportion, uniformly stirred, densely formed, and cured and hardened. artificial stone. Concrete has the characteristics of abundant raw materials, low price and simple production process, so its consumption is increasing. [0003] With the rapid development of engineering fields such as bridges and high-rise buildings in our country, the performance requirements for concrete strength and other aspects are getting higher and higher. Compared with high-rise construction projects, bridge projects are located outdoors, and brid...

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Problems solved by technology

[0003] With the rapid development of engineering fields such as bridges and high-rise buildings in our country, the performance requirements for concrete strength and other aspects are getting higher and higher. Compared with high-rise construction projects, bridge projects are located outdoors, and bridge concrete is directly exposed to the open environment. , the environment is even worse. At the interface between the pier and the air, due to the change of the water level, it will be impacted by water for a long time, and the concrete structure will corrode more seriously after a long time. Therefore, it is urgent to develop a concrete with high strength, good impermeability and impact resistance.

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