关键词: 渗透结晶材料;裂缝自愈合;裂缝深度;强度恢复率;抗渗恢复率

Abstract: Permeable crystallization material was incorporated in concretes with and without fly ash and slag.Ordinary concrete without permeable crystallization material was also prepared for comparison . Influence of permeable crystallization material on concrete crack self-healing was investigated by crack depth test, strength recovery test and impermeability recovery test .The self-healing hydration was analyzed by SEM-EDS.The results show that concrete crack self-healing is significantly improved by permeable crystallization material .With the incorporation of permeable crystallization material , the crack depth can be decreased while the strength and impermeability recovery rate can be increased obviously . For concretes with fly ash and slag , the improvement effect is much more obvious .The reason of the improvement is that permeable crystallization material can promote the formation and enrichment of Calcium Silicate ( Aluminate) Hydrate at crack zone .

Key words: permeable crystallization material;crack self-healing;crack depth;strength recovery rate;impermeability recovery rate