Comparison of the effects of micro and macro polymer fiber on the mechanical and durability of roller-compacted concrete pavements

Document Type : Research Article


1 دانشکده عمران و محیط زیست، دانشگاه صنعتی امیرکبیر، تهران، ایران

2 عضو هیات علمی

3 بخش فناوری بتن، مرکز تحقیقات راه، مسکن و شهرسازی، تهران،



A laboratory study was performed to determine the benefits of micro and macro fibers in roller-compacted concrete (RCC) for pavements by measuring the RCCs mechanical and durability properties. To this aim, three RCC mixtures with use of micro and macro polyolefin-based fibers in two volumetric content (1 and 2 kg/m3) were prepared and the mechanical properties (compressive strength and flexures strengths (modulus of rupture and toughness)) and durability properties (salt scaling under freeze-thaw and water permeability) were evaluated. The results emphasized that the macro fibers could be efficiently enhanced the toughness in comparison with the microfibers. Moreover, the water permeability of fiber-concrete decreased up to 20% in comparison with the reference concrete. Furthermore, it was found that the application of microfibers in comparison with macro fibers significantly improved the salt-scaling resistance of concrete.


Main Subjects

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