Work

Dynamic compressive properties and constitutive model of waste crumb rubber (CR) modified ultra-high performance engineered cementitious composites (UHP-ECC)

Year: 2024

Type: article

Abstract: Ultra-high-performance engineered cementitious composites (UHP-ECC) are well-known for their outstanding mechanical properties under static and dynamic loads. However, the effect of modifying UHP-ECC with crumb rubber (CR) on its performance, especially under high strain rates , remains poorly understood. This study systematically examined the dynamic compressive behavior and characteristic failure patterns of CR-modified UHP-ECC under high strain rates using a split Hopkinson pressure bar (SHPB) system. The study focused on evaluating the dynamic compressive strength , stress-strain response, and strain energy density (SED). A dynamic increase factor (DIF) formula was developed based on experimental data, and a nonlinear viscoelastic constitutive model was proposed to predict compressive behavior across various strain rates . Results indicate that while the addition of 10 % CR slightly reduces the quasi-static compressive and flexural strength , it significantly enhances tensile ductility. Under high strain rates , CR-modified UHP-ECC shows no substantial effect on peak compressive stress but a marked increase in peak compressive strain . The SED also increased by 20.2 %, outperforming other high-performance materials such as UHPC and normal ECC. These findings demonstrate that incorporating 10 % CR into UHP-ECC offers considerable advantages, particularly in enhancing structural resilience under dynamic loading conditions . The proposed nonlinear viscoelastic model accurately predicts the compressive behavior of CR-modified UHP-ECC, presenting significant implications for practical engineering applications where high strain rate performance is crucial.

Source: Journal of Building Engineering

DOI: 10.1016/j.jobe.2024.111453

Authors: Huzi Ye, Qianpeng He, Jinlong Pan, Binrong Zhu

Institutions: Southeast University, Nanjing Forestry 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: $3,320