Abstract
Using lithium-slag as the mineral mixtures is to make up of high performance concrete. We study lithium-slag's effect on concrete's crack resistance and analyze its mechanism by scanning electron microscope (SEM). Using a flat method evaluates early-age crack resistance of concrete with lithium-slag. At the same time, we analyze dry-shrinkage property of concrete with lithium-slag. The results show that lithium-slag can improve crack resistance of concrete, make its early-age crack degree in decline and dry-shrinkage rate decreased than standard concrete's. Considering the strength and crack resistance of concrete and other factors, when the mixing amount of lithium-slag add up to 20%, the effect of increased crack resistance of concrete and strength will be best.
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