Study the Properties of Concrete Using Fly Ash, Sea Sand, with Fiberglass Reinforcement

Concrete using fly ash, sea sand, and fiberglass reinforcement is becoming increasingly effective. Especially, when sea sand is used instead of river sand, it has both economic and environmental benefits. Different properties of concrete were obtained in this investigation utilizing concrete samples with fly ash, sea sand, and varying the content of fiberglass reinforcement. In this study, the survey of changing the content of glass fiber reinforcement from 1 to 2 showed that the compressive strength of concrete increased by 12 compared to the sample without using glass fiber reinforcement. At the same time, the tensile strength in bending increased by nearly 30 compared to concrete without fiberglass reinforcement. Besides that, high temperatures created in the concrete as a result of cement hydration cause thermal tensile stresses. These stresses cause cracks in mass concrete structures if they are not controlled. Research results show that the maximum temperature difference in the sea embankment using concrete from fly ash, sea sand and fiberglass reinforcement does not exceed the allowed temperature (20°C). This suggests that the risk of thermal cracking was lowered in this study when concrete with fly ash, sea sand, and fiberglass reinforcement was used for massive concrete structures. The above research results can be a reference for construction projects in coastal areas of Vietnam. © 2023 American Institute of Physics Inc.. All rights reserved.