發(fā)布時(shí)間：2018-11-22 08:51

【摘要】：采用新型含磷材料(KMP)及水泥(PC)分別對(duì)鋅、鉛污染土進(jìn)行固化處理。通過(guò)無(wú)側(cè)限抗壓強(qiáng)度、水穩(wěn)性、回彈模量和壓汞試驗(yàn),探究固化污染土作為路基填料的力學(xué)及耐久特性。結(jié)果表明:常規(guī)養(yǎng)護(hù)條件下,KMP和PC固化污染土強(qiáng)度隨齡期和摻量增長(zhǎng)而提高,強(qiáng)度越大;鋅、鉛復(fù)合污染條件下,固化污染土強(qiáng)度最低。經(jīng)過(guò)泡水試驗(yàn),固化試樣強(qiáng)度均有所下降且7d強(qiáng)度損失較高;鉛、鋅復(fù)合污染條件下,強(qiáng)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(duì)PC固化污染土,KMP試樣微孔隙多、中、大孔隙較少,結(jié)構(gòu)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(xué)江蘇省城市地下工程與環(huán)境安全重點(diǎn)實(shí)驗(yàn)室;江蘇省電力設(shè)計(jì)院;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41330641)、國(guó)家自然科學(xué)基金(51278100,41472258) 863計(jì)劃(2013AA06A206) 江蘇省自然科學(xué)基金(BK 2012022)
【分類(lèi)號(hào)】：U414

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