固化疏浚淤泥作路基材料工程特性试验研究

发布时间：2018-03-15 20:33

本文选题：固化　切入点：疏浚淤泥　出处：《土木建筑与环境工程》2017年02期 　论文类型：期刊论文

【摘要】：为了探讨粉煤灰和工业矿粉固化疏浚淤泥作路基材料的可行性,通过一系列室内实验研究了不同固化剂配比对固化淤泥击实特性、水稳定性、承载力和抗剪强度的影响。实验结果表明,不同固化剂配比下固化淤泥的最大干密度均超过1.50g/cm3,最优含水率约为20~21%;淤泥固化处理后浸水4d的膨胀率均不超过1.1%,水稳性大幅提升;矿粉含量越高,粉煤灰含量越低,CBR(California Bearing Ratio)值越高,土样的承载力越高,抗剪强度也越高。不同工况浸水4d的CBR值均达到了较高的水平,工况SD10FA20MP(淤泥∶粉煤灰∶矿粉=7∶1∶2)CBR值最高,达到了34.8%,是规范中高速、一级公路路基填料要求最低CBR值的4.35倍,作路基填料使用可行。
[Abstract]:In order to study the feasibility of solidifying dredged silt with fly ash and industrial mineral powder as subgrade material, the compaction characteristics and water stability of solidified silt with different ratio of curing agent were studied through a series of laboratory experiments. The experimental results show that the maximum dry density of solidified silt exceeds 1.50g / cm ~ (-3), and the optimum moisture content is about 20 ~ 21g / cm ~ (-3), the swelling rate of the sludge after 4 days of soaking treatment is less than 1.1 / cm ~ (-3), and the water stability is greatly improved. The higher the content of mineral powder, the lower the content of fly ash, the higher the value of CBR, the higher the bearing capacity, the higher the shear strength, the higher the CBR value of soaking water for 4 days under different conditions, and the higher the value of SD10FA20MP( silt: fly ash: mineral powder: 7: 1: 2CBR), the highest is the value of SD10FA20 (silt: fly ash: mineral powder 7: 1: 2CBR). It reaches 34.8, which is 4.35 times of the minimum CBR value required by the first class highway subgrade filler, and is feasible to be used as subgrade filler.
【作者单位】：江南大学环境与土木工程学院;
【基金】：国家自然科学基金(51609102) 大连理工大学海岸和近海工程国家重点实验室开放基金(LP1613) 国家级大学生创新训练(201510295065)~~
【分类号】：U416.1

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