White high-durability fair-faced concrete and preparation method thereof

Abstract

The invention discloses a white high-durability fair-faced concrete and a preparation method thereof. The fair-faced concrete comprises 240-280 kg / m3 of white Portland cement, 100-120 kg / m3 of mineralpowder, 40-60 kg / m3 of fly ash, 24-70 kg / m3 of silica fume, 24-45 kg / m3 of fine sinking beads, 24-45 kg / m3 of limestone powder, 270-300 kg / m3 of large stone, 500-540 kg / m3 of medium stone, 270-300 kg / m3 of small stone, 650-700 kg / m 3 of sand, 160-240 kg / m3 of water and 3-4.5 kg / m3 of additive. The preparation method comprises the following steps: sequentially adding white Portland cement, part ofwater, an additive, mineral powder, fly ash, silica fume, fine sinking beads and limestone powder; after stirring for a first period, adding large stone, medium stone, small stone and sand; continuously stirring for a second period, and adding the residual water, wherein the total stirring time is not less than a third period. The white Portland cement is used as a raw material, a certain proportion of other components are added in the preparation process, the white high-durability fair-faced concrete with ideal appearance color can be prepared on the basis of keeping the mechanical strengthof the fair-faced concrete, the white high-durability fair-faced concrete is formed at a time, and secondary color supplementing is not needed.

Description

technical field [0001] The application belongs to the technical field of cement concrete, and in particular relates to a white high-durability fair-faced concrete and a preparation method thereof. Background technique [0002] With the development of social economy, fair-faced concrete, as a form of modernist architectural art, is more and more widely loved and sought after by people because it does not use any decorative materials such as paint and can show the original and simple texture of concrete. However, during the use of fair-faced concrete, its appearance often has quality problems such as inconsistent color, cracks, pockmarks, and poor durability. Through the analysis of the reasons for the quality defects of fair-faced concrete, the quality problems of fair-faced concrete are generally controlled by technical methods such as changing concrete admixtures, changing mix ratios, changing additives, controlling vibration time, controlling formwork removal and curing ti...

AI Technical Summary

Problems solved by technology

However, the current technical methods are not ideal in terms of the durability and appearance of clear-water concrete, nor can it take into account high durability and good appearance color at the same time. Often, fair-faced concrete with good durability requires a large area of ​​color supplementation in the later stage to make clear water Concrete loses the meaning of one-time pouring, which does not conform to the concept of time-saving, labor-saving, material-saving and environmental protection of fair-faced concrete

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