Recycled concrete with high compressive strength

Abstract

The invention relates to the field of concrete, and particularly discloses a recycled concrete with high compressive strength and a preparation method thereof. The recycled concrete with high compressive strength is prepared from the following raw materials in parts by weight: 90-110 parts of cement; 120-150 parts of recycled aggregate subjected to silicon carbide strengthening treatment; 100-130parts of natural fine aggregate; 0.3-1.2 part of a polypropylene fiber; 8-12 parts of fly ash; 1.5-2.2 parts of a water reducing agent; and 45-55 parts of water; the preparation method comprises the following steps: mixing and stirring the silicon carbide reinforced recycled aggregate, the natural fine aggregate, the polypropylene fiber and fly ash together, adding cement, mixing and stirring, adding the water reducing agent and water, and mixing and stirring to obtain the recycled concrete with high compressive strength. The recycled concrete with high compressive strength has the advantagesof saving gravel resources and being high in compressive strength.

Description

technical field [0001] This application relates to the field of concrete, and more specifically, it relates to a recycled concrete with high compressive strength. Background technique [0002] With the acceleration of urban construction, the development of the construction industry is also accelerating, making people's demand for concrete higher and higher. Concrete is made of cement, sand and water in an appropriate proportion. The manufacture of concrete requires a large amount of energy. Sand and gravel, and the appearance of recycled concrete can alleviate the consumption of sand and gravel. [0003] Recycled concrete is to add recycled aggregates to concrete aggregates to reduce the addition of aggregates such as new sand and gravel. Regenerated aggregates are generally obtained from waste concrete, and waste concrete is added to concrete aggregates as aggregates after crushing and cleaning. In order to reduce the use of new sand and gravel, reduce the consumption of s...

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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that a large number of micro-cracks will be generated during the crushing process of recycled aggregates, and the existence of micro-cracks will easily lead to a decrease in the strength of recycled aggregates, which in turn will lead to a decrease in the compressive strength of recycled concrete

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