Early-age performance of slag cement with Type IL cement has been found to be equal to or better than with Portland cement from the same source. The alumina in the slag cement can react with more of the finely divided limestone to form additional carboaluminate hydrates that then results in reduced porosity and increased early-age strength. There is also reduced permeability, as indicated by ASTM C1202 test results.
While some early published papers indicated a potential concern for an increased risk of low-temperature thaumasite sulfate attack, our extensive long-term tests on concretes have shown that Type IL cement- slag cement combinations are as resistant to sulfate attack as Type I cement-slag cement combinations and more resistant than equivalent w/cm concretes made with Type V cements to both the ettringite and thaumasite forms of degradation.
This presentation will include discussion on these two topics and will also look at some recent projects with these materials. Speakers will walk through different reaction rates such as resistivity and diffusion with portland limestone cements, strength results and modeling.
Presented By: R Doug Hooton, University of Toronto
Description: Professor Doug Hooton is the NSERC/CAC Industrial Research Chair in Concrete Durability and Sustainability. His research involves finding ways to reduce the greenhouse gas emissions associated with concrete infrastructure. He investigates the use of materials such as supplementary cementitious materials and ground limestone to produce a stronger and more durable concrete product. His research has informed the specification codes associated with the American Concrete Institute, the Canadian Standards Association and ASTM standards. He has conducted research on Slag Cement since 1975.
Details
| Title | Performance of Slag Cement with Portland Limestone Cement in Concrete |
| Duration | 56 Mins |
| Language | English |
| Format | MP4 |
| Size | 121 MB |
| Download Method | Direct Download |
| Download Links | BECOME A MEMBER VIEW DOWNLOAD LINKS |
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