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Effect of weathering on properties of coarsely fragmented residual rock
Conclusions 1. Atmospheric weathering of residual, coarsely fragmented rock formations causes mainly a change in their physical properties, and in this connection it is recommended that the weathering intensity should be determined from the change in the grain-size distribution. 2. The weathering coefficient $ K_{W} $ is a complex parameter which takes into account both the degree of natural disintegration of the rock and the disruptions of the crystal bonds in its fragments. 3. Weathering over a period of one year depends on the initial weathering of the coarsely fragmented residual rock, and intensifies as $ K_{W} $ increases. The maximum weathering rate is observed during the first 15 days of each of the typical seasons of the year. The most intensive weathering time is the autumn-spring period. 4. Compaction by tamping is one of the effective methods of increasing the bearing capacity of weathered, coarsely fragmented rock materials during prolonged idle periods of excavation work, and likewise in using excavated, coarsely fragmented materials in earthen structures and bedding fills of various types.
Effect of weathering on properties of coarsely fragmented residual rock
Conclusions 1. Atmospheric weathering of residual, coarsely fragmented rock formations causes mainly a change in their physical properties, and in this connection it is recommended that the weathering intensity should be determined from the change in the grain-size distribution. 2. The weathering coefficient $ K_{W} $ is a complex parameter which takes into account both the degree of natural disintegration of the rock and the disruptions of the crystal bonds in its fragments. 3. Weathering over a period of one year depends on the initial weathering of the coarsely fragmented residual rock, and intensifies as $ K_{W} $ increases. The maximum weathering rate is observed during the first 15 days of each of the typical seasons of the year. The most intensive weathering time is the autumn-spring period. 4. Compaction by tamping is one of the effective methods of increasing the bearing capacity of weathered, coarsely fragmented rock materials during prolonged idle periods of excavation work, and likewise in using excavated, coarsely fragmented materials in earthen structures and bedding fills of various types.
Effect of weathering on properties of coarsely fragmented residual rock
Shvets, V. B. (author) / Gaiduk, Yu. A. (author)
1976
Article (Journal)
English
Local classification TIB:
770/6545/8000
BKL:
56.20
Ingenieurgeologie, Bodenmechanik
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