電石渣激發(fā)礦渣改良鉛污染土工程特性試驗(yàn)研究
[Abstract]:Pb contaminated soil was improved by industrial waste such as carbide slag and slag. The unconfined compressive strength, compression characteristic, water stability coefficient and Pb ion leaching concentration of Pb contaminated soil improved by calcium carbide slag combined with slag were studied experimentally. The mechanism of improved subgrade soil was analyzed by SEM. The results show that the unconfined compressive strength (qu) of the modified uncontaminated soil is higher than that of the Pb contaminated soil under the same aggregate content, and the porosity ratio of the modified uncontaminated clay is smaller than that of the Pb contaminated clay after 15% aggregate improvement. The coefficient of water stability of improved Pb contaminated soil is lower than that of unpolluted soil, and the concentration of Pb2 in leaching solution decreases with the increase of curing age under the same aggregate content. A large number of dense hydrated calcium silicate (C-S-H) network products were formed by hydration reaction of slag in alkaline environment generated by calcium carbide slag.
【作者單位】: 青島理工大學(xué)(臨沂);
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(51409154)
【分類號(hào)】:TU43
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