查看文章

Grouted splice sleeve connection is a crucial component in modular/prefabricated building structures. However, the reliability (e.g., crack-induced durability issues) of the grouting materials in the splice sleeve connection during their service life is hardly assessed. The external maintenance strategy is usually unimplemented. A capsule-based grouting material was considered in this paper to prolong the service life of the connection through self-healing micro-cracks induced by mechanical force (e.g., seismic and wind load). The influences of capsules on the grouting material in terms of flowing property, compressive strength and porosity were investigated in this paper. The morphological features of the capsule, as well as its status in uncracked and cracked (i.e., failed and triggered) grout matrix, were characterized by scanning electron microscope (SEM). The experimental results revealed that adding no more than …