TY - JOUR
T1 - Experimental study for temperature effect on swelling pressures during saturation of bentonites
AU - Ruan, Kunlin
AU - Wang, Hailong
AU - Komine, Hideo
AU - Ito, Daichi
N1 - Funding Information:
This study was supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT, No. 18H01534) and was conducted as a part of activities of Research Institute of Sustainable Future Society, Waseda Research Institute for Science and Engineering. This work was also supported by JST SPRING, Grant Number JPMJSP2128.
Publisher Copyright:
© 2022
PY - 2022/12
Y1 - 2022/12
N2 - Swelling pressure tests were conducted at 25, 50, and 80°C to elucidate the temperature effect on swelling pressures at peak, valley, re-peak and equilibrium points (ppeak, pvalley, pre-peak, and peq) in swelling pressure evolution curve. Three powder bentonites (Kunigel-V1, Volclay, and Kunibond) and two granular bentonites (MX-80 and Kunigel-GX) were used to investigate the grain size effect on ppeak, pvalley, pre-peak, and peq at different temperatures. Experimentally obtained results were the followings. 1) For the powder bentonites, ppeak, pvalley, pre-peak, and peq increased with the increase of dry density and rose with increasing temperature; 2) For the granular bentonites, ppeak, pvalley, pre-peak, and peq decreased as temperature rose and increased as dry density rose; 3) All five bentonites were found to have larger values for (peq-pvalley) at higher dry density and lower temperature conditions. Swellings and montmorillonite fabric unit interactions during saturation were discussed with swelling pressure evolution curve. Temperature effect on peq was carefully explained.
AB - Swelling pressure tests were conducted at 25, 50, and 80°C to elucidate the temperature effect on swelling pressures at peak, valley, re-peak and equilibrium points (ppeak, pvalley, pre-peak, and peq) in swelling pressure evolution curve. Three powder bentonites (Kunigel-V1, Volclay, and Kunibond) and two granular bentonites (MX-80 and Kunigel-GX) were used to investigate the grain size effect on ppeak, pvalley, pre-peak, and peq at different temperatures. Experimentally obtained results were the followings. 1) For the powder bentonites, ppeak, pvalley, pre-peak, and peq increased with the increase of dry density and rose with increasing temperature; 2) For the granular bentonites, ppeak, pvalley, pre-peak, and peq decreased as temperature rose and increased as dry density rose; 3) All five bentonites were found to have larger values for (peq-pvalley) at higher dry density and lower temperature conditions. Swellings and montmorillonite fabric unit interactions during saturation were discussed with swelling pressure evolution curve. Temperature effect on peq was carefully explained.
KW - Bentonites
KW - Grain size
KW - Swelling pressures
KW - Temperature
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U2 - 10.1016/j.sandf.2022.101245
DO - 10.1016/j.sandf.2022.101245
M3 - Article
AN - SCOPUS:85142476606
VL - 62
JO - Soils and Foundations
JF - Soils and Foundations
SN - 0038-0806
IS - 6
M1 - 101245
ER -