Experimental evaluation of the effect of Nano-Graphene on the durability of roller-compacted concrete pavements under freeze-thaw cycles

Document Type : Research Article

Authors

Department of Civil Engineering, BandarAnzali Branch, Islamic Azad University, Bandaranzali, Iran

Abstract

Millions of dollars are spent every year on road pavements, which generally require rehabilitation every one to five years. Roller-compacted concrete (RCC) pavements are a good replacement for asphalt pavements due to their special properties, such as better durability and conformity with sustainable development principles. On the other hand, changes in the ambient temperature, which cause freeze-thaw cycles, can strongly affect the strength and durability of concrete pavements. Hence, a study of the impact of freeze-thaw cycles and additives on the properties of RCC seems necessary for developing suitable measures for controlling damage and durability loss in concrete. To this end, the present study investigated the influence of cement and nanographene content on the durability of pavements and the weight loss, dynamic modulus of elasticity, durability factor, and spalling of RCC. Nanographene with 0.05%, 0.07%, and 0.1% of cement weight was added to specimens prepared with cement grades of 200, 250, and 300. The specimens were subjected to freeze-thaw cycles after preparation and curing. According to the results, the addition of nanographene improved the properties of RCC under freeze-thaw cycles, reduced weight loss and spalling in the specimens with different cement contents, and enhanced their durability factor and modulus of elasticity. Although adding nanographene significantly contributed to better concrete properties, its effect was directly related to the concrete content. Finally, the optimal values of the cement and graphene content after 300 cycles were obtained to be 300 and 0.05% of cement weight, respectively.

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Main Subjects

References

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AUT Journal of Civil Engineering
Volume 8, Issue 1
2024
Pages 43-50

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