Abstract
The purpose of this study was to investigate the effect of polypropylene (PP) fibers and supplementary cementitious materials (SCMs) on the compressive and flexural properties of seawater engineered cementitious composites (ECC). A total of 12 mix ratios and 4 curing ages were designed in the experiment. The SCMs used limestone calcined clay (LC2) and fly ash (FA). The effects of seawater, SCMs and PP fibers on the load carrying capacity, deformation capacity and energy absorption capacity under compression and flexural resistance were explored. The pore structure and micromorphology were investigated by MIP and SEM, respectively. The results show that the incorporation of 25 % LC2 can show better mechanical properties and promote early hydration. At 56 d curing age, its compressive strength and flexural strength can reach 53.27 MPa and 6.30 MPa, respectively. Adding 2 % volume of PP fiber to cement composites can further increase the toughness of the material, especially when combined with 25 % LC2, its compressive and flexural properties are better than those of ordinary seawater ECCs.
Published Version
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