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SUMMARY:Self-healing cut-off wall materials - Benyi Cao\, PhD Research Stu
 dent at the Department of Engineering\, University of Cambridge
DTSTART:20201022T150000Z
DTEND:20201022T154500Z
UID:TALK151108@talks.cam.ac.uk
CONTACT:Magdalena Charytoniuk
DESCRIPTION:The contamination of soil and groundwater is a widespread issu
 e that can adversely affect human health and ecosystems. The containment a
 pproach using cut-off walls is one of the most commonly used land remediat
 ion technologies. Despite the widespread application of cement-bentonite s
 lurry trench cut-off walls and soil mix technology constructed cut-off wal
 ls\, the materials deteriorate under mechanical\, chemical\, and environme
 ntal stresses. The damage of cut-off walls can lead to the problems relate
 d to the undermined mechanical and transport properties\, impacting their 
 serviceability and reliability and in some cases leading to the undetected
  physical breach of the wall.  Developing crack-resistant and self-healing
  cement-bentonite and soil mix materials could provide more resilient\, su
 stainable\, and reliable cut-off walls with significantly enhanced durabil
 ity\, reduced maintenance costs\, enhanced safety\, and protection against
  sudden or undetected failure. This PhD research investigates the developm
 ent of crack-resistant and self-healing cementitious cut-off wall material
 s incorporating polymers and minerals. The overall performance of four add
 itives\, including superabsorbent polymers (SAPs)\, oil sorbent polymers\,
  reactive magnesia (MgO) and microencapsulated sodium silicate (Na₂SiO
 ₃) in two cut-off wall materials (cement-bentonite slurry and soil mix c
 ut-off wall materials) is the interest of this study.\n
LOCATION:Delivered online via Zoom
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