High-performance panel concrete and preparation method thereof

Abstract

The invention provides a high-property concrete for preparing the panel of panel rock-fill dam, and relative preparation process, for overcoming the defect of prior concrete which volume is instable. The inventive concrete is made from gelatinizing material, skeleton material, water and additive, wherein the gelatinizing material consumption is 280-390Kg / m3 concrete, the additive is water reducer, which consumption is 0.7-3.5% of the gelatinizing material, the ratio between water and gel is 0.30-0.45. The preparation comprises that adds skeleton material (sand and stone), gelatinizing material (cement and coal ash), water reducer and water into a mixer in turn, and mixes for 90-120s, to prepare panel concrete which apparent density is 2400-2600Kg / m3. The high-property panel concrete prepared by the inventive formula and method has high volume stability, high crack resistance, barrier property, freezing resistance, corrosion resistance, and carbonation resistance.

Description

technical field [0001] The invention relates to a concrete and a preparation method thereof, in particular to a high-performance concrete used for preparing a face plate of a face rockfill dam and a preparation method thereof. Background technique [0002] Concrete face rockfill dam is the most common and fastest growing type of earth-rockfill dam in water conservancy and hydropower engineering. [0003] With the continuous progress of science and technology, especially the emergence of large-scale vibrating mills, the filling density of rockfill bodies has been significantly increased, the deformation and water seepage have been reduced, and the safety, economy and adaptability are excellent. Competitive new dam type. The concrete face is the main anti-seepage structure of the face rockfill dam, and it is also the interface between water, air and rockfill, and the working environment is complex. Therefore, there are high requirements for the performance of the concrete use...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the performance of traditional cement concrete materials, the problem of volume stability of panel concrete has always led to cracking of panel concrete almost without exception, and it is difficult to make a major breakthrough in the research and application of improving the crack resistance of panel concrete

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