Ultra-large-particle-size hydraulic asphalt concrete impermeable material

Abstract

The invention discloses an ultra-large-particle-size hydraulic asphalt concrete impermeable material and a rock-fill dam built through the material. The mineral aggregate gradation index of the impermeable material is 0.38, the largest aggregate size of aggregate is 31.5 mm, and the asphalt-aggregate ratio of asphalt content of the impermeable material is 6.5%. The material meets standard requirements of the roller compacted asphalt concrete core wall technology. When the ultra-large-particle-size hydraulic asphalt concrete impermeable material is used in actual projects, the pressure bearing capacity of a hot asphalt mixture can be greatly improved. Roller compaction construction equipment of a roller compacted asphalt concrete core wall and transition materials on the two sides is unified. Equipment cost in the roller compacted asphalt concrete core wall construction process is reduced, and workloads for maintenance and management are reduced. Meanwhile, construction cost of a roller compacted asphalt concrete core wall project is reduced. By means of the material, the construction pave thickness of the roller compacted asphalt concrete core wall is increased, daily construction intensity of the roller compacted asphalt concrete core wall can be improved to a large extent, and technological supports are provided for ensuring the construction process of the roller compacted asphalt concrete core wall project.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, in particular to the technical field of construction engineering of water conservancy and hydropower water retaining structures, and in particular to a roller-compacted asphalt concrete anti-seepage material for water conservancy and hydropower engineering water retaining structures and a core wall rockfill dam constructed thereof. Background technique [0002] At present, RCC core rockfill dams are widely used in my country, especially for those with high seismic design intensity, poor geological conditions, deep overburden, and unsuitable for other dam types, RCC core dams are widely used. The wall dam is undoubtedly the best choice, and its good earthquake resistance and anti-seepage performance have been verified by the operating projects. However, during the construction of the RCC core wall project, thermal construction is generally adopted according to the characteristics o...

AI Technical Summary

Problems solved by technology

The present invention has carried out the following field tests in cold and high-altitude areas: do not change the material (maximum aggregate particle size 19mm), use the original construction equipment (use less than 1.5t special small vibrating roller for asphalt concrete core wall), increase asphalt concrete booth The pavement thickness was 35cm, but the test results failed to achieve the effect of improving the daily construction strength of the roller compacted asphalt concrete core wall and ensuring the construction progress

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