It is crucial to investigate the cyclic compression performance of low-carbon engineered cementitious composites(ECC) with limestone and calcined clay(LCC) during earthquakes. In this paper, the effects of water-binder ratios and replacement rates of LCC were investigated on the mechanical properties…
It is crucial to investigate the cyclic compression performance of low-carbon engineered cementitious composites(ECC) with limestone and calcined clay(LCC) during earthquakes. In this paper, the effects of water-binder ratios and replacement rates of LCC were investigated on the mechanical properties of LCC-ECC under uniaxial cyclic compression. The failure mode was observed, and the law of the stress-strain curves was summarized. The influences of the water- binder ratio and LCC substitution rate on the stress degradation, stiffness degradation, and hysteretic energy dissipation were analyzed for specimens subjected to uniaxial cyclic compressive loading. The results showed that reducing water-binder ratio can effectively decrease the stiffness degradation and hysteretic energy dissipation, but had little effect on the stress degradation. The replacement rate of LCC significantly affected the stress degradation, stiffness degradation, and hysteretic energy dissipation of the specimens. In particular, the ductility and energy dissipation of the specimens were notably improved at a 50%.substitution rate. Finally, a damage constitutive model for LCC-ECC under uniaxial cyclic compression is proposed. The model accurately predicted the unloading path, reloading path, residual strain development, and damage evolution of LCC-ECC.