Ultrahigh-strength self-compacting concrete and preparation method thereof

Abstract

The invention discloses an ultrahigh-strength self-compacting concrete and a preparation method thereof. The ultrahigh strength self-compacting concrete is mainly composed of a cementing material, an efficient water reducer, a fine aggregate, a coarse aggregate, water and PVA (Polyvinyl Alcohol) fibers, wherein the cementing material is composed of 70%-80% of common silicate cement, 10%-20% of mineral slag and 5%-10% of silicon powder by weight percentage; the fine aggregate is medium sand; the coarse aggregate is granite macadam. The ultrahigh-strength self-compacting concrete has the beneficial effects that the advanced techniques of the ultrahigh-strength concrete and the self-compacting concrete in the field of the concrete materials at present are studied, the advantages of the two concrete techniques are combined so that the dosage of the cement is reduced while ultrahigh performance of the concrete is realized, and furthermore, the purposes of emission reduction of CO2, materials saving and environmental protection as well as green construction are achieved.

Description

【Technical field】 [0001] The invention relates to the field of inorganic non-metallic materials, in particular to ultrahigh-strength self-compacting concrete and a preparation method thereof. 【Background technique】 [0002] With the development trend of high-rise, long-span, lightweight, underground and harsh environment of modern buildings, the requirements for the strength and durability of concrete used in modern construction projects are also getting higher and higher. Under this engineering background, high-strength and ultra-high-strength concrete stand out for their excellent performance. Generally speaking, ultra-high-strength concrete refers to concrete with a cubic compressive strength greater than 100 MPa. The advantages of using high-strength and ultra-high-strength concrete in the beam and column components of buildings are very obvious. Under the same conditions, the higher the strength of concrete, the size and volume of its components will be relatively red...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the difficulty in realizing the ultra-high strength and high fluidity of concrete at the same time in the existing concrete technology, and provide a design and preparation method of an ultra-high performance self-compacting concrete material

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