Hydraulic conductivity test system for compacted, 2-mm-thick bentonite specimens
Hydraulic conductivity test system for compacted, 2-mm-thick bentonite specimens
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用于压实 2 毫米厚膨润土样品的水力传导率测试系统
DOI：
10.1016/j.sandf.2022.101210
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发表时间：
2022
影响因子：
3.7
通讯作者：
Komine Hideo
中科院分区：
文献类型：
--
作者：
Ito Daichi;Wang Hailong;Komine Hideo
放射性废物处置设施的设计和安全评估都需要准确评估膨润土材料，特别是压实膨润土的导水率。对于膨润土材料的渗透性测试，样本饱和和测量所需的较长时间可能会成为瓶颈。膨润土的渗透行为，例如水质和可交换阳离子的影响，尚未充分系统化。在本研究中，开发了一种具有 2 毫米厚样本的水力传导率测试系统。从测试精度方面评估其适用性。对干密度为 1.34–1.79 Mg/m3 的六个压实日本钠膨润土样本进行了落头导水率测试。结果表明，本研究设置的水力梯度不会影响水力传导率，表明宏观水力行为符合达西定律。此外，与使用 10 毫米厚的样本相比，可以大大缩短测试时间，大约十分之一。发现获得的水力传导率与早期研究中的相似。此外，这些值显示出较小的变化，特别是在合并测试结果方面。结果表明，2 毫米厚的样品可用于测量压实膨润土的水力传导率。
Both the design and safety assessment of radioactive waste disposal facilities demand an accurate evaluation of the hydraulic conductivity of the bentonite materials, especially compacted bentonite. For permeability tests of bentonite materials, the lengthy time necessary for specimen saturation and measurement may present a bottleneck. The permeability behavior of bentonite, such as the effects of the water quality and the exchangeable cations, has not been systematized sufficiently. For the present study, a hydraulic conductivity test system with 2-mm-thick specimens was developed. Its applicability was evaluated in terms of test accuracy. Six specimens of compacted Japanese sodium bentonite, with dry densities of 1.34–1.79 Mg/m3, were subjected to falling head hydraulic conductivity tests. The results showed that the hydraulic gradient set for this study did not affect the hydraulic conductivity, indicating that the macroscopic hydraulic behavior was consistent with Darcy's law. Furthermore, it was possible to reduce the test period considerably, by about one-tenth, compared to that using 10-mm-thick specimens. The obtained hydraulic conductivity was found to be similar to that in earlier studies. Furthermore, the values showed less variation particularly in terms of the consolidation test results. The results demonstrated that 2-mm-thick specimens are useful for hydraulic conductivity measurements of compacted bentonite.
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影响因子：
3.7
作者：
H. Komine;N. Ogata
通讯作者：
H. Komine;N. Ogata
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
Tomoyoshi Nishiumura;J. Koseki;D. Fredlund;H. Rahardjo
通讯作者：
H. Rahardjo
不同含水量下膨润土的膨胀行为研究
影响因子：
5.8
作者：
Hailong Wang;Dachi Ito;Takumi Shirakawabe;Kunlin Ruan;H. Komine
通讯作者：
H. Komine
蒙脱土的阳离子过滤对人工海水中某些膨润土水力电导率的影响
DOI：
10.1061/(asce)gt.1943-5606.0002513
发表时间：
2021
期刊：
影响因子：
--
作者：
H. Komine
通讯作者：
H. Komine
DOI：
10.1139/t07-025
发表时间：
2007
期刊：
影响因子：
--
作者：
Greg Siemens;J. Blatz
通讯作者：
J. Blatz