Crack Self-healing of Cementitious Materials with Crystalline Admixture: Evaluation Based on Permeability Performance
摘要
An evaluation method for self-healing capacity was designed, which includes the control of initial cracks and subsequent permeability testing. This method was employed to evaluate the self-healing behavior of mortars incorporating crystalline admixtures (CAs) under various conditions, including water immersion, limewater soaking, and wet-dry cycles, with varying CA dosages and crack widths. The experimental results indicate that cement possesses inherently self-healing capability. Limewater environments inhibits healing compared with water immersion; however, wet-dry cycles enhance the effectiveness of higher CA dosages. Increasing the CA content can not improve healing performance, and wide cracks (0.3 mm) substantially reduce the intrinsic self-healing potential of cement.