Direct Shear Behavior of Nanometer Magnesia Reinforced Cement Soil with 28d Age
Direct Shear Behavior of Nanometer Magnesia Reinforced Cement Soil with 28d Age
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28d龄期纳米镁质增强水泥土的直剪性能
DOI：
10.2174/1874155x01408010509
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发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
卢廷浩
中科院分区：
文献类型：
--
作者：
王伟;宋新江;池旭超;卢廷浩
为了解纳米氧化镁添加剂对水泥土力学性能的改性效果，对不同掺量的纳米氧化镁改性水泥土（NmCS）进行了28 d龄期固结快剪试验。设计了8种纳米氧化镁添加剂，其掺量为0%~ 3%。结果表明：（2）随着纳米氧化镁掺量的增加，NmCS的抗剪强度呈现先增大后减小的趋势，当纳米氧化镁掺量为1%时，抗剪强度达到最大值;（3）内摩擦角和粘聚力均呈起伏变化，分别呈凹状和凸状;（4）NmCS具有较大的变形抗力，剪切破坏过程中的剪切位移明显小于普通水泥土。最后，根据试验结果，从水泥水化和颗粒相互作用的角度分析了纳米水泥石力学性能的微观机理。
In order to properly understand the modification effects of nanometer magnesia additive on cement soil mechanical performance, a consolidated quick shear laboratory test on nano-magnesium-modified cement-soil (NmCS) sample with different mixing ratio at 28-day age was conducted. Eight kinds' of nanometer magnesia additives with mixing ratios ranging from 0% to 3% were designed to take into the test. The result shows that: (1) shear stress- displacement curves of all samples consist of three distinct stages with brittle failure; (2) with the nanometer magnesia mixing ratio increase, the NmCS shear strength shows an increase at first and then a decrease, and the shear strength reaches the maximum with the mixing ratio of 1%; (3) both the friction angle and cohesive force are a fluctuating and show a concave and convex shape respectively; (4) with greater deformation resistance, the shear displacement of NmCS is significantly less than the ordinary cement soil in the shear failure process. Finally, according to the test results, the micro-mechanism of NmCS mechanical performance was analyzed from the perspective of cement hydration and particle interaction.
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影响因子：
1.5
作者：
Zhu Xiang-rong
通讯作者：
Zhu Xiang-rong
纳米颗粒路面混凝土的孔结构及氯离子渗透性
影响因子：
7.4
作者：
Zhang, Mao-hua;Li, Hui
通讯作者：
Li, Hui
影响因子：
3.7
作者：
Douce RW;Aleman W;Chicaiza-Ayala W;Madrid C;Sovero M;Delgado F;Rodas M;Ampuero J;Chauca G;Perez J;Garcia J;Kochel T;Halsey ES;Laguna-Torres VA
通讯作者：
Laguna-Torres VA
影响因子：
0.7
作者：
Jiu Jin
通讯作者：
Jiu Jin
影响因子：
7.4
作者：
Morsy, M. S.;Alsayed, S. H.;Aqel, M.
通讯作者：
Aqel, M.