Abstract
To study the behavior of compacted gypsiferous sandy soil during soaking and leaching process , samples were selected from a site at Baquba city .Soil has no gypsum, mixed with different amounts of gypsum ( 10%,20%,30% and 40% ). Experiments which are carried out on this soil ,indicated that by using of standard Proctor test, the maximum dry density decreased with the increase gypsum content and optimum moisture content decreased slightly initially and then increase until reached 18.4% and then decreased with increasing gypsum content . As expected, increasing gypsum content increase the settlement recorded during soaking and leaching process .The settlement obtained by soaking gypsiferous soil is more than that obtained by leaching process
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