Measurement of Vertical Strain of Compacted Bentonite Subjected to Hydration Effort on Creep Test
Measurement of Vertical Strain of Compacted Bentonite Subjected to Hydration Effort on Creep Test
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DOI：
10.1007/978-3-319-52773-4_16
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发表时间：
2017-01
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影响因子：
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通讯作者：
T. Nishimura;Keita Iwasaki
中科院分区：
文献类型：
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作者：
T. Nishimura;Keita Iwasaki
压实膨润土是屏障体系结构骨架的组成部分。压实膨润土的水热力学性质在过去的几十年中已经在地质环境工程等领域进行了研究（Olivella等，Olivella等，1996）。采用改进的相对湿度循环系统对膨润土进行蠕变试验。在无侧限抗压强度的基础上施加各种垂直应力，只有98%的相对湿度作为水化作用对变形中的蠕变行为有影响。因此，无论是在垂直方向上的膨胀或收缩进行了测量，所有试样接近完全破坏，由于施加的机械效应和水化效应的共同努力。
Compacted bentonite which is one component of structure framework of barrier system. The hydro-thermal-mechanical properties of compacted bentonite have been investigated in the past decades in the area such as geoenvironmental engineering (Olivella et al. Olivella et al. 1996). This study conducted creep test for bentonite using a modified relative humidity circulation system. Various vertical stresses were applied on basis of unconfined compressive strength that only relative humidity of 98% as hydration effort influenced to creep behaviour in deformation. Thus, either expansion or shrinkage in vertical direction was measured, and all specimens approached to be completely destruction due to apply the combined effort of mechanical effect and hydration effect.