Mechanism study of crack propagation in river sand Engineered Cementitious Composites (ECC)

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Mechanism study of crack propagation in river sand Engineered Cementitious Composites (ECC)
Title:
Mechanism study of crack propagation in river sand Engineered Cementitious Composites (ECC)
Journal Title:
Cement and Concrete Composites
Publication Date:
01 February 2022
Citation:
Li, Y., Li, J., Yang, E.-H., & Guan, X. (2022). Mechanism study of crack propagation in river sand Engineered Cementitious Composites (ECC). Cement and Concrete Composites, 128, 104434. https://doi.org/10.1016/j.cemconcomp.2022.104434
Abstract:
While incorporation of river sands improves the volume stability and lowers the cost of ECC, distinct multiple cracking and tensile strain-hardening behavior of the resulting river sand ECC (RS-ECC) with different strength grade were observed. This paper investigates the effects of river sand inclusion on crack propagation in RS-ECC. It concludes that crack deflection at RS/matrix interface prevails in the normal strength RS-ECC while crack penetration through RS dominates in the high strength RS-ECC. As a result, crack path in the normal strength RS-ECC is more tortuous which increases matrix fracture toughness and lead to less saturated multiple cracking and reduced tensile strain capacity. Crack branching can occur when the crack propagates through the RS in the high strength mix, resulting in more saturated multiple cracking in the high strength RS-ECC with improved tensile strain capacity.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the Ministry of Education, Singapore - NTUitive Gap Fund
Grant Reference no. : NGF-2020-08-013

The authors acknowledge the financial support from the National Key Research and Development Program of China (2018YFC0705404), the National Natural Science Foundation of China (52078171), and China Scholarship Council (201906120300)
Description:
ISSN:
0958-9465
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