Effect of granulated blast furnace slag on the self-healing capability of mortar incorporating crystalline admixture

摘要

Self-healing properties of cementitious materials is an important way to improve the durability of concrete. The effect of various granulated blast furnace slag (GBFS) contents on the self-healing properties of mortar with crystalline admixture (CA) were studied. The compressive strength recovery rate, water absorption rate and visual crack healing were used to evaluate the early age and structural cracks self-healing capability, and the self-healing products were studied by X-ray diffraction (XRD), scanning electron microscopy and energy spectrum analysis (SEM-EDS). The results show that CA ensures the self-healing properties, the mortar with CA and 10 wt. % GBFS has the highest self-healing capability, and the healing product is mainly composed of calcium carbonate. (C) 2019 Elsevier Ltd. All rights reserved.