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CATEGORIES:Engineering Department Geotechnical Research Semin
 ars
SUMMARY:Self-healing cut-off wall materials - Benyi Cao\, 
 PhD Research Student at the Department of Engineer
 ing\, University of Cambridge
DTSTART;TZID=Europe/London:20201022T160000
DTEND;TZID=Europe/London:20201022T164500
UID:TALK151108AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/151108
DESCRIPTION:The contamination of soil and groundwater is a wid
 espread issue that can adversely affect human heal
 th and ecosystems. The containment approach using 
 cut-off walls is one of the most commonly used lan
 d remediation technologies. Despite the widespread
  application of cement-bentonite slurry trench cut
 -off walls and soil mix technology constructed cut
 -off walls\, the materials deteriorate under mecha
 nical\, chemical\, and environmental stresses. The
  damage of cut-off walls can lead to the problems 
 related to the undermined mechanical and transport
  properties\, impacting their serviceability and r
 eliability and in some cases leading to the undete
 cted physical breach of the wall.  Developing crac
 k-resistant and self-healing cement-bentonite and 
 soil mix materials could provide more resilient\, 
 sustainable\, and reliable cut-off walls with sign
 ificantly enhanced durability\, reduced maintenanc
 e costs\, enhanced safety\, and protection against
  sudden or undetected failure. This PhD research i
 nvestigates the development of crack-resistant and
  self-healing cementitious cut-off wall materials 
 incorporating polymers and minerals. The overall p
 erformance of four additives\, including superabso
 rbent polymers (SAPs)\, oil sorbent polymers\, rea
 ctive magnesia (MgO) and microencapsulated sodium 
 silicate (Na₂SiO₃) in two cut-off wall materials (
 cement-bentonite slurry and soil mix cut-off wall 
 materials) is the interest of this study.\n
LOCATION:Delivered online via Zoom
CONTACT:Magdalena Charytoniuk
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