{"id":21145,"date":"2026-11-11T14:01:40","date_gmt":"2026-11-11T13:01:40","guid":{"rendered":"https:\/\/navier-lab.fr\/?post_type=event&#038;p=21145"},"modified":"2026-11-11T14:52:54","modified_gmt":"2026-11-11T13:52:54","slug":"navier-seminar-prof-marcelo-sanchez-texas-am-university-usa","status":"publish","type":"event","link":"https:\/\/navier-lab.fr\/en\/agenda\/navier-seminar-prof-marcelo-sanchez-texas-am-university-usa\/","title":{"rendered":"Navier Seminar : Prof. Marcelo Sanchez (Texas A&#038;M University, USA)"},"content":{"rendered":"<p><section class=\"kc-elm kc-css-328562 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-389764 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\">\n<div class=\"kc-elm kc-css-33712 kc-title-wrap \">\n\n\t<h1 class=\"kc_title\">Thermo-Mechanical Behavior of Bentonite at High Temperatures: Experimental Evidence and Constitutive Modeling<\/h1>\n<\/div>\n<\/div><\/div><\/div><\/div><\/section><section class=\"kc-elm kc-css-493401 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-838590 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-605777 kc_text_block\"><\/p>\n<h2><strong>Abstract:<\/strong><\/h2>\n<p style=\"font-weight: 400;\">Bentonite-based materials are widely considered for engineered barriers in deep geological repositories for radioactive waste. Understanding their thermo-hydro-mechanical (THM) behavior at elevated temperatures is essential for assessing their long-term performance.<\/p>\n<p style=\"font-weight: 400;\">This seminar presents recent experimental and constitutive modeling investigations into the behavior of saturated bentonite at temperatures approaching 200\u00b0C. Laboratory tests conducted using specially developed high-temperature equipment provide insights into thermal volume changes, swelling pressure, compressibility, and water exchange under controlled mechanical and hydraulic conditions.<\/p>\n<p style=\"font-weight: 400;\">The results reveal notable changes in bentonite behavior at elevated temperatures, highlighting complex interactions between thermal, hydraulic, and mechanical processes. These findings are interpreted through a constitutive modeling framework incorporating an additional thermally activated plastic mechanism. The implications for predicting bentonite behavior under extreme thermal conditions and for the performance of engineered barriers are discussed.<\/p>\n<p>\n<\/div><\/div><\/div><\/div><\/div><\/section><section class=\"kc-elm kc-css-669323 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-825654 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-17722 kc_text_block\"><\/p>\n<h2><strong>Short bio:<\/strong><\/h2>\n<p data-pm-slice=\"1 1 &#091;&#093;\">Marcelo S\u00e1nchez is the Fred J. Benson Chair Professor in the Zachry Department of Civil and Environmental Engineering at Texas A&#038;M University, USA. He obtained his Ph.D. from the Universitat Polit\u00e8cnica de Catalunya (UPC), Barcelona, Spain, in 2004. His research focuses on advanced geomechanics, particularly coupled thermal, hydraulic, mechanical, and chemical processes in geomaterials, with applications in energy and environmental geotechnics. He has authored more than 150 peer-reviewed publications and received several awards, including the George Stephenson Medal from the Institution of Civil Engineers (UK) in 2012. He is the founder and former Chair of the ISSMGE Technical Committee TC308 on Energy Geotechnics and has served as Chair of the ISSMGE Technical Oversight Committee.<\/p>\n<p>\n<\/div><\/div><\/div><\/div><\/div><\/section><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":186,"featured_media":0,"template":"","class_list":["post-21145","event","type-event","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/event\/21145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/event"}],"about":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/types\/event"}],"author":[{"embeddable":true,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/users\/186"}],"wp:attachment":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/media?parent=21145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}