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International Journal of Engineering Technology and Construction, 2022, 3(3); doi: 10.38007/IJETC.2022.030302.

Crack Resistance and Toughening Mechanism of Nano-SiO2 Reinforced PVA Fiber Cement-based Composites in Steel Bridge Engineering


Edrise Zeinalli

Corresponding Author:
Edrise Zeinalli

Islamic Azad University, Iran


With the development of steel bridge engineering science, PVA fiber cement-based composite materials are gradually being explored and applied. Because of its high ductility and toughness, it has received extensive attention from academia and industry. Cement-based composite materials are essentially made of cement-related raw materials, which are mixed with various other materials to form composite materials. Incorporating Nano-SiO2 into it can effectively improve the structural performance and durability of cement-based composite materials. Therefore, the purpose of this paper is to study the crack resistance and toughness mechanism of Nano-SiO2 reinforced PVA fiber cement-based composites in steel bridge engineering. This paper first determined the design plan of the mix ratio of the Nano-SiO2 PVA fiber cement-based composite material, and then used the composite beam composed of PVA fiber concrete and existing concrete as the experimental object.  The test data shows that when the amount of hydrophilic nanopowder SiO2 reaches 1%, the compressive strength of the mortar at the second and third day of age is increased. At this time, the higher the content of hydrophilic nanopowder SiO2, the higher its compressive and flexural strength. However, when the content is greater than 1.0%, the content of hydrophilic nano-powder SiO2 has no great influence on the improvement of its compressive strength.


PVA Fiber, Cement-Based Composite Material, Flexural Toughness, Crack Resistance and Toughness

Cite This Paper

Edrise Zeinalli. Crack Resistance and Toughening Mechanism of Nano-SiO2 Reinforced PVA Fiber Cement-based Composites in Steel Bridge Engineering. International Journal of Engineering Technology and Construction (2022), Vol. 3, Issue 3: 20-37. https://doi.org/10.38007/IJETC.2022.030302.


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