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段坤, 边晓亚, 陈家乐, 白俊龙. 水泥-废砖细骨料双掺固化黏土试验研究[J]. 岩土工程学报, 2021, 43(S2): 174-177. DOI: 10.11779/CJGE2021S2042
引用本文: 段坤, 边晓亚, 陈家乐, 白俊龙. 水泥-废砖细骨料双掺固化黏土试验研究[J]. 岩土工程学报, 2021, 43(S2): 174-177. DOI: 10.11779/CJGE2021S2042
DUAN Kun, BIAN Xiao-ya, CHEN Jia-le, BAI Jun-long. Experimental investigation on clay stabilized by cement and waste brick fine aggregate[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 174-177. DOI: 10.11779/CJGE2021S2042
Citation: DUAN Kun, BIAN Xiao-ya, CHEN Jia-le, BAI Jun-long. Experimental investigation on clay stabilized by cement and waste brick fine aggregate[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 174-177. DOI: 10.11779/CJGE2021S2042

水泥-废砖细骨料双掺固化黏土试验研究

Experimental investigation on clay stabilized by cement and waste brick fine aggregate

  • 摘要: 高含水率黏土与废砖等建筑垃圾的弃置会造成巨大的资源浪费和严重的环境污染,如何有效解决这一问题是国内外研究的热点。提出用水泥-废砖细骨料双掺固化处理高含水率黏土(双掺固化土)的方法,通过室内试验测试了不同配合比条件下双掺固化土的无侧限抗压强度,分别研究了废砖细骨料、水泥掺量对双掺固化土强度特性的影响及其压缩变形特性。试验结果表明:当水泥掺量大于等于8%时,掺入废砖细骨料能够提高高含水率黏土的强度,且早期强度增长速率比后期快;但废砖细骨料的加入也增大了双掺固化土的变异性;双掺固化土的破坏形态主要表现为塑性剪切破坏,其破坏应变一般在2.5%~3%,表明双掺固化土韧性比一般水泥固化土好。

     

    Abstract: The disposal of high water content clay and waste bricks (including other construction wastes) has caused huge resource waste and serious environment of pollution. How to effectively solve these problems is a hot issue. An innovative approach mixing cement and brick waste fine aggregate is prposed to stabilize the high water content clay (called as double mixing stabilized clay, DMSC). The laboratory experiments are conducted to test the unconfined compressive strengths of DMSC with different mixing proportions and curing time. In addition, the influences of waste brick fine aggregate and cement content on the strength and compressive deformation characteristics of DMSC are studied respectively. The results indicate that when the cement content is greater than or equal to 8%, adding the waste brick fine aggregate can enhance the strength of the cement-stabilized clay with high water content, and the growth rate of early strength is faster than that of late strength. It is noteworthy that the addition of waste brick fine aggregate increases the variability of DMSC. The failure modes of DMSC is mainly the plastic shear failure, and its failure strain generally ranges from 2.5% to 3%, so the toughness of DMSC is better than that of the general cement-stabilized clay.

     

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