文献类型：期刊文献

英文题名：Unconfined Mechanical Properties of Nanoclay Cement Compound Modified Calcareous Sand of the South China Sea

作者：Wang, Wei[1];Li, Jian[1];Hu, Jun[2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Hainan Univ, Coll Civil Engn & Architecture, Haikou 570228, Hainan, Peoples R China

年份：2020

卷号：2020

外文期刊名：ADVANCES IN CIVIL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000607930500006)、、Scopus(收录号：2-s2.0-85098851285)、WOS

基金：This study was supported by the National Natural Science Foundation of China (51968019 and 41772311), the High Level Talent Project of Hainan Basic and Applied Basic Research Plan (2019RC148 and 2019RC351), and the Hainan Natural Science Foundation (518QN307 and 519QN333).

语种：英文

外文摘要：Calcareous sand is characterized by low strength, multiporosity, and high-pressure shrinkage. This often leads to poor engineering properties. Therefore, it is often necessary to reinforce the calcareous sand in order to meet the actual engineering demand for bearing capacity. To study the modification effect of calcareous sand of nanoclay by cement, mechanical tests and microscopic tests of the cement calcareous sand (CCS) modified by different nanoclay content and cement content were conducted. Through the unconfined compressive test, the mechanical properties of nanoclay and cement compound modified calcareous sand (NCCS) were studied. The micromechanism of nanoclay and cement composite modified calcareous sand was analyzed by SEM. Representative curves of data groups of stress and strain data were obtained by the fusion algorithm, which effectively circumvented the discrete distribution of determined data. Test results showed that the following: (1) The compressive property of CCS could be improved by the admixture of nanoclay, and the optimum admixture ratio was 8%. (2) The admixture of nanoclay could enhance the deformation modulus of CCS and improve the resistance of CCS against external load deformation capacity. (3) Nanoclay could increase the density of the internal structure of CCS and improve its mechanical properties.