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SUMMARY:The effect of microcapsules for autonomic self-healing cementitiou
 s materials - Petros Giannaros\, CUED
DTSTART:20170202T160000Z
DTEND:20170202T164500Z
UID:TALK69296@talks.cam.ac.uk
CONTACT:Magdalena Charytoniuk
DESCRIPTION:Concrete\, a composite material consisting of aggregates bound
  together with cement paste\, is the most widely used construction materia
 l. The production of cement alone accounts for a significant amount of ant
 hropogenic carbon-dioxide emissions and there is a real need to reduce cem
 ent consumption whilst creating more durable materials and structures. \n\
 nCurrently\, concrete structures are maintained through continual\, and co
 stly\, inspection and repair. Self-healing concrete offers an alternative 
 to this existing paradigm by autonomously healing microscale damage as it 
 arises. This is achieved through the addition of microencapsulated healing
  agents for autonomic self-healing concrete. \n\nWhen cracking occurs\, ei
 ther due to mechanical damage or environmental exposure\, the dispersed mi
 crocapsules fracture\, subsequently releasing their encapsulated material 
 into the crack volume. This material then has the ability to react with th
 e environment to provide filling\, sealing or healing of the crack.\n\nIn 
 this work\, microcapsules are added into cement\, mortar and concrete. The
  effect of a varying proportion of microcapsules on fresh\, hardened and s
 elf-healing properties is quantified. Results are presented from a large-s
 cale self-healing concrete site trial\; the first of its kind in the U.K. 
 Recommendations are made for the further development of a commercial self-
 healing concrete using microcapsules.
LOCATION: Cambridge University Engineering Department\, Lecture Room 3A
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