nStudy on crack resistance of high performance concrete with lithium-slag

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.