TY - JOUR ID - 3516 TI - Evaluation of the effect of strength, duration, water pressure and casting direction on concrete permeability JO - Amirkabir Journal of Civil Engineering JA - CEEJ LA - en SN - 2588-297X AU - Naderi, Mahmood AU - Kaboudan, Alireza AD - Department of civil engineering, Faculty of engineering, International Imam Khomeini university, Qazvin, Iran Y1 - 2020 PY - 2020 VL - 52 IS - 9 SP - 2379 EP - 2398 KW - Concrete KW - Permeability KW - Cylindrical chamber method KW - Water Pressure KW - Test duration KW - Direction of casting DO - 10.22060/ceej.2019.16237.6166 N2 - One of the major factors which controls the serviceability life of a concrete structure is its durability. Since the durability is dependent mainly on the permeability, some standards such as BS EN 12390-8 and DIN 1048-5 are aimed for water permeability assessment of concrete. Based on these standard test methods, a constant pressure is applied to the concrete surface, perpendicular to casting direction for a specific period of time. Since the applied water pressure, test duration and the direction of casting affect the concrete permeability, 150mm concrete cubes with water/cement ratios of 0.4, 0.5 and 0.6 were prepared and at the ages of 7, 28 and 91 days (after water curing) the permeability of the cubes was investigated, using “Cylindrical chamber” method. The results show that the penetration depth and volume in the casting direction are lower than the respective values, obtained in the direction, perpendicular to casting. It was also observed that, regarding the water/cement ratio, the exponent of the power function used to approximate the relation of penetration depth and volume with pressure, is approximately constant at a specific age and testing direction. This issue wasn’t observed when approximating the relation of penetration depth and volume with test duration, using the power function. A linear relationship between the penetration depth and the penetration volume was also observed. UR - https://ceej.aut.ac.ir/article_3516.html L1 - https://ceej.aut.ac.ir/article_3516_368be5a786effcd96192cfc912ab6b90.pdf ER -