Work

Experimental study on dynamic compressive properties of early strength seawater and sea-sand ECC

Year: 2025

Type: article

Abstract: Early strength seawater and sea sand engineered cementitious composites (ESSECC) are a new type of material with high early strength and strain-hardening behavior. In this study, the dynamic compressive tests of ESSECC were conducted employing the Split Hopkinson pressure bar (SHPB), with various strain rates and dosages of PVA fiber and CNTs considered. The failure patterns, dynamic stress-strain curves, dynamic peak stress, dynamic peak strain, dynamic increaser factor (DIF), and energy absorption capacity were systematically analyzed. Results indicated that the dynamic compressive behavior of ESSECC, including dynamic peak stress, dynamic peak strain, DIF and energy absorption capacity exhibited significant strain rate effect , with all parameters increased with the rising of strain rate . The incorporation of PVA fiber enhanced the crack propagation resistance, while CNTs filled nano pores in the matrix, resulting in a denser microstructure. The hybrid fibers at multiple scales exhibited a synergistic effect , effectively improving the dynamic compressive performance of ESSECC. Furthermore, the dynamic enhancement mechanism of ESSECC was analyzed by scanning electron microscope (SEM) images.

Source: Journal of Building Engineering

DOI: 10.1016/j.jobe.2025.112817

Authors: Siyu Wang, Chenlong Lin, Caiwang Tai, Yiyan Lu

Institution: Wuhan University

Language: English

Topic: Innovative concrete reinforcement materials

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $3,940