Traditional concrete materials are brittle and easy to crack, which is difficult to meet the requirements of crack and leakage prevention of urban rail transit. The ultra-high toughness and excellent crack control ability of PVA fiber reinforced cement-based composite (PVA-ECC) are two orders of magnitude higher than that of concrete. So, supplanting conventional cement with PVA-ECC can extraordinarily work on the solidness of present day substantial design, it can further develop its administration life and lessen the upkeep cost in the help stage. In this paper, the full scale mechanical properties of PVA-ECC were examined by direct malleable test, compressive test and meager plate four point twisting test. This paper extensively investigates the impacts of fly ash content, sand cover proportion, water folio proportion and PVA fiber content on the mechanical properties of PVA-ECC. In this paper, PVA-ECC with various mechanical properties can be acquired by changing various boundaries as per the real designing necessities, and they meet the bridge deck structure for compressive performance, flexural performance and tensile performance. It has good engineering practical application significance. The experimental results show that when the content of PVA fiber reaches 1.5%, when it reaches the tensile strength is relatively low, the secant modulus of PVA-ECC is 101.54mpa, indicating that PVA-ECC with the content of 1.5% PVA fiber has better toughness.

Siying Li. ECC Mechanical Properties of Reinforced Ultra-high Toughness Cement-based Composites. International Journal of Engineering Technology and Construction (2023), Vol. 4, Issue 1: 1-17. https://doi.org/10.38007/IJETC.2023.040101.

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