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SUMMARY:Reactive MgO cement concrete - Xincheng Li\, CUED
DTSTART:20111125T160000Z
DTEND:20111125T170000Z
UID:TALK33152@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:With great concern about the environmental issues such as high
  energy demand and high CO2 emissions during the production of Portland ce
 ment (PC) and durability problems of PC-based concrete\, there is an urgen
 t need to find more sustainable solutions. The recently invented reactive 
 MgO cements are claimed as a potential solution to deal with such environm
 ental and durability issues. Basically\, MgO cements are blends of reactiv
 e MgO and PC in different proportions depending on the application and int
 ended benefits and were developed with a range of sustainability and techn
 ical benefits. With a small amount reactive MgO in PC\, greater mechanical
  properties such as improved strength and density\, and durability perform
 ance in terms of enhanced resistance to sulfate attack\, acid attack are e
 xpected. However\, there is very little data available regarding this nove
 l reactive MgO cement system in general and its application in concrete in
  particular.\n\nIn this talk\, citric acid reactivity of nine MgOs from di
 fferent sources including commercial products and laboratory burned will b
 e presented\; workability\, mechanical properties such as density\, porosi
 ty and strength and durability performance in terms of resistance to HCl\,
  sulfates and accelerated calcium leaching of PC concrete samples with 4-1
 0% MgOs will be discussed. 
LOCATION:Engineering Department - Lecture Room 6
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