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首页> 外文会议>International conference on case histories in geotechnical engineering >Evaluating the Compaction Behavior of Soils with Biochar Amendment
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Evaluating the Compaction Behavior of Soils with Biochar Amendment

机译：用生物炭修正法评估土壤的压实特性

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Biochar has been identified as an environmentally friendly soil amendment material that inhibits greenhouse gas emission from solid waste disposal sites, and that enhances nutrient removal capacity of site soils. A literature survey indicates that there is a lack of research focusing on the mechanical properties of soils amended with biochar. This work examines the behavior of compacted soil-biochar specimens. Standard Proctor compaction curves obtained for a silty sand soil, a 6 percent biochar-soil mixture, and a 10 percent biochar-soil mixture are investigated. It was hypothesized and proven correct that the dynamic compactive effort of the hammer breaks the biochar particles, and therefore creates inconsistent compaction curves when the biochar-soil mixture was reused for the preparation of subsequent specimens at increased water content. The compaction curves were reproducible when the compacted mixture was discarded from use in preparing subsequent specimens. Comparing the compaction curves obtained with and without remixing, a reduced maximum density was obtained for the later. It was also observed that, with increasing biochar percentage (by volume), the optimum water content of the mixture increased and the maximum dry density decreased.
机译：生物炭已被确认为一种环境友好的土壤改良材料，可抑制固体废物处置场所的温室气体排放，并增强场地土壤的养分去除能力。文献调查表明，缺乏针对用生物炭改良的土壤的机械性能的研究。这项工作检查了压实的土壤生物炭标本的行为。研究了粉砂质土壤，6％的生物炭-土壤混合物和10％的生物炭-土壤混合物获得的标准Proctor压实曲线。假设并证明是正确的，锤子的动态压实力会破坏生物炭颗粒，因此当将生物炭-土壤混合物重新用于增加水分含量的后续样品的制备时，会产生不一致的压实曲线。当压实的混合物不再用于制备后续样品时，压实曲线是可再现的。比较在有和没有再混合的情况下获得的压实曲线，随后获得的最大密度降低。还观察到，随着生物炭百分比（按体积计）的增加，混合物的最佳含水量增加，最大干密度降低。

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