Institution:土建与水利学院

Title of Paper:A comparative investigation on the effect of synthetic wood pulp and microfibrillated cellulose on the high-velocity impact resistance and shrinkage properties of high-performance mortars

Journal:Construction and Building Materials

Key Words:Cellulose fiber; Projectile impact; Internal curing; Autogenous shrinkage; High performance concrete

Summary:Cement matrix is increasingly becoming the relatively weak phase, which limits the further enhancement of ballistic impact resistance of high performance cement composites. Cellulose-based fiber is a promising strengthening agent for cement matrix due to its internal curing and reinforcement effect. This study presents a comparative investigation on the effect of two cellulose-based fibers, synthetic wood pulp (SWP) and microfibrillated cellulose (MFC), on the ballistic impact resistance, as well as shrinkage and physical/mechanical properties of high strength mortars (HSMs). Ballistic impact resistance is evaluated at two different velocities of approximately 400 m/s and 675 m/s, using conical-nosed 8-mm-diameter projectiles. The results indicate that incorporating SWP or MFC leads to a considerable enhancement of ballistic impact resistance, in terms of reduced penetration depth, crater diameter and volume. The beneficial effect of SWP and MFC is more pronounced at 675 m/s in comparison to that at 400 m/s. The MFC appears more effective in decreasing the penetration depth and crater volume in comparison to SWP. The addition of SWP and MFC is also beneficial for reducing autogenous/drying shrinkage and improving compressive/flexural strengths and hardness of HSMs. The results of this study provide insights on further improving the impact resistance of HSMs for protective structures.

First Author:Fengling Zhang

Correspondence Author:Xiaochen Zhang,Kai Yan

All the Authors:Kai Pang,Dan Li,Wenlong Xu,Jinglong Li,Qifang Liu

Document Code:1897581927488745473

Discipline:Engineering

First-Level Discipline:Civil Engineering

Document Type:J

Volume:470

Page Number:140457

Number of Words:10

Translation or Not:No

Date of Publication:2025-04

Release Time:2025-05-27

Manuscript.pdf