Dynamic Compressive Properties of High Strength and High Ductility Engineered Cementitious Composites

doi:10.16552/j.cnki.issn1001-1625.2025.0423

Abstract

Abstract: In order to study the performance of high-performance cementitious materials under extreme environments, this study systematically investigated the dynamic compression performance of high strength and high ductility engineered cementitious composites (HS-ECC) under cyclic impact loading using a split Hopkinson pressure bar (SHPB) device, focusing on the effects of different impact velocities and steel fiber volume doping on the dynamic compression performance. The results show that, HS-ECC specimens with steel fibers doping of 0.6%(volume fraction) are damaged after six cyclic impacts with an impact velocity of 5 m/s, and the strain rate of HS-ECC specimens increases with the increase of the number of impacts. Dynamic compressive strength, strain rate and impact toughness all increase significantly with impact velocity. Steel fiber doping significantly improves the impact ultimate load carrying capacity and the toughness of HS-ECC, when the content of steel fiber increases from 0% to 0.6%, the dynamic compressive strength of the specimen increases by 23.4%, and the dynamic impact toughness of the specimen increases by 52.9%, which fully proves that the content of steel fiber has a positive regulatory effect on the dynamic mechanical properties of HS-ECC. HS-ECC has a wide range of application prospects in the field of anti-explosive and anti-impact areas, such as the extreme environment of military protection or the protection wall of the nuclear power plant.

Key words: high strength and high ductility engineered cementitious composites, steel fiber, split hopkinson pressure bar, dynamic compression performance, cyclic impact, impact toughness

CLC Number:

TU528

ZHAO Yu, GU Lixin, SHEN Guanghai, ZHU Lingli. Dynamic Compressive Properties of High Strength and High Ductility Engineered Cementitious Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(11): 4060-4070.

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