【摘要】：采用新型含磷材料(KMP)及水泥(PC)分別對鋅、鉛污染土進行固化處理。通過無側限抗壓強度、水穩(wěn)性、回彈模量和壓汞試驗,探究固化污染土作為路基填料的力學及耐久特性。結果表明:常規(guī)養(yǎng)護條件下,KMP和PC固化污染土強度隨齡期和摻量增長而提高,強度越大;鋅、鉛復合污染條件下,固化污染土強度最低。經過泡水試驗,固化試樣強度均有所下降且7d強度損失較高;鉛、鋅復合污染條件下,強度降低幅度最高,水穩(wěn)系數(shù)為0.52~0.58。固化污染土回彈模量低于固化未污染土但高于未固化污染土回彈模量,且KMP試樣回彈模量高于水泥試樣回彈模量的6.7%~24.2%。相對PC固化污染土,KMP試樣微孔隙多、中、大孔隙較少,結構致密。
[Abstract]:Zinc and lead contaminated soils were cured by new phosphorous material (KMP) and cement (PC) respectively. Based on the tests of unconfined compressive strength, water stability, elastic modulus and mercury injection, the mechanical and durability characteristics of solidified contaminated soil as subgrade fillers were investigated. The results show that under conventional curing conditions, the strength of KMP and PC solidified contaminated soils increases with the increase of age and content, and the strength of cured contaminated soils increases with the increase of age and content, while the strength of solidified contaminated soils is the lowest under the condition of zinc and lead compound pollution. The strength of solidified samples decreased and the loss of strength was higher in 7 days after the test of foam water, and the decrease of strength was the highest under the condition of lead and zinc compound pollution, and the coefficient of water stability was 0.52 ~ 0.58. The elastic modulus of solidified contaminated soil is lower than that of solidified uncontaminated soil but higher than that of unsolidified contaminated soil, and the elastic modulus of KMP sample is higher than that of cement sample. Compared with PC solidified contaminated soil, KMP sample has more micropores, less macropores and denser structure.
【作者單位】： 東南大學江蘇省城市地下工程與環(huán)境安全重點實驗室;江蘇省電力設計院;
【基金】：國家自然科學基金重點項目(41330641)、國家自然科學基金(51278100,41472258) 863計劃(2013AA06A206) 江蘇省自然科學基金(BK 2012022)
【分類號】：U414

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