摘要：
This study presents an experimental investigation on the feasibility of adopting micro-cellulose fiber as not only internal curing but also micro-reinforcement agents for high-performance cement composites (HPCs). The effect of micro-cellulose fiber on the ballistic impact resistance, in terms of penetration depth, crater diameter, volume, profile and cracking pattern, as well as physical, mechanical and shrinkage properties is explored. It was found that the incorporation of micro-cellulose fiber in HPCs leads to a significant decrease of the penetration depth (13.6 %), crater diameter and volume (27.6 %). The autogenous and drying shrinkage of HPCs at various ages up to 91 days are significantly reduced due to the addition of micro-cellulose fiber. Furthermore, incorporating micro-cellulose fiber does not have a significant effect on the early-age compressive and flexural strengths, but increases the late-age compressive and flexural strengths. With the aid of micro-cellulose fiber, HPCs with excellent ballistic impact resistance and volume stability can be successfully fabricated. The results of this study contribute towards the implementation of HPCs in in-situ application for protective structures where autogenous shrinkage and related cracking are highly problematic.
