Amirkabir University of Technology Amirkabir Journal of Civil Engineering 2588-297X 55 3 2023 05 22 Effect of Zeolite on the Compressive Strength and Durability Properties of Roller-Compacted Mass Concrete Effect of Zeolite on the Compressive Strength and Durability Properties of Roller-Compacted Mass Concrete 641 664 5078 10.22060/ceej.2023.21999.7875 FA Ali Sarafi Department of Civil Engineering, Faculty of Civil Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran. Seyed Mehdi Zahrai School of Civil Engineering, University of Tehran 0000-0003-2759-2424 Amir Mohammad Ramezanianpour Tehran university Journal Article 2022 12 08 <span style="letter-spacing: .05pt;">Roller Compacted Mass Concrete is one of the special types of concrete that has a low amount of cement in its mixture proportion in order to reduce the heat caused by the hydration reaction. This increases the permeability of roller-compacted concrete compared to conventional concrete. The increase in permeability also leads to the entry of destructive ions into the concrete of mass structures and ultimately the instability of these structures. Supplementary cementitious materials such as zeolite can reduce permeability, so in this research, the effect of replacing a part of cement with zeolite on the durability and mechanical properties of roller-compacted concrete has been investigated. First, chemical analysis and the pozzolanic activity of zeolite were investigated. Then, in order to evaluate the effect of zeolite on the properties of concrete, roller-compacted concrete specimens were made in four mixture proportions with replacement percentages of 0%, 15%, 30% and 40% of cement with zeolite and subjected to compressive strength, water penetration depth, water absorption, Rapid Chloride Permeability Test (RCPT), electrical resistivity, Ultrasonic Pulse Velocity (UPV). The workability of the roller-compacted concrete mixtures was also determined by the V.B. time test. The results showed that according to RCPT, water penetration depth and electrical resistivity tests, replacing 15% of cement weight with zeolite reduces permeability and significantly improves the durability properties of roller-compacted concrete. Also, increasing the percentage of zeolite reduces the compressive strength of the specimens.</span> <span style="letter-spacing: .05pt;">Roller Compacted Mass Concrete is one of the special types of concrete that has a low amount of cement in its mixture proportion in order to reduce the heat caused by the hydration reaction. This increases the permeability of roller-compacted concrete compared to conventional concrete. The increase in permeability also leads to the entry of destructive ions into the concrete of mass structures and ultimately the instability of these structures. Supplementary cementitious materials such as zeolite can reduce permeability, so in this research, the effect of replacing a part of cement with zeolite on the durability and mechanical properties of roller-compacted concrete has been investigated. First, chemical analysis and the pozzolanic activity of zeolite were investigated. Then, in order to evaluate the effect of zeolite on the properties of concrete, roller-compacted concrete specimens were made in four mixture proportions with replacement percentages of 0%, 15%, 30% and 40% of cement with zeolite and subjected to compressive strength, water penetration depth, water absorption, Rapid Chloride Permeability Test (RCPT), electrical resistivity, Ultrasonic Pulse Velocity (UPV). The workability of the roller-compacted concrete mixtures was also determined by the V.B. time test. The results showed that according to RCPT, water penetration depth and electrical resistivity tests, replacing 15% of cement weight with zeolite reduces permeability and significantly improves the durability properties of roller-compacted concrete. Also, increasing the percentage of zeolite reduces the compressive strength of the specimens.</span> https://ceej.aut.ac.ir/article_5078_e1054bf2d703bca1e8fe101d3ac5efcd.pdf