What"s mean by water bound macadam road(WBM)?
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Answer Posted / jayanta kumar choudhury
Stone aggregates of size 4omm to 50mm are first laid at a thickness of 100mm on d sub base. Then it is dry rolled . After that screening is spread n again dry rolled til maximum void is filled by screening materials. After that water is poured so that maxiumum screening fills d voids . After that rolling starts n water is contiuously poured over d wheel of d roller . During this process screening is sprinkled n d process continues til d water starts to run in front of wheel. It implies that d voids r completely sealed n water cannot enter d layer . Wbm is complete
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