S. Kazemian 1 and S. Ghareh 2 Effects of Cement, Different Bentonite, and Aggregates on Plastic Concrete in Besh-Ghardash Dam, Iran Reference Kazemian, S. and Ghareh, S., “Effects of Cement, Different Bentonite, and Aggregates on Plastic Concrete in Besh-Ghardash Dam, Iran,” Journal of Testing and Evaluation, Vol. 45, No. 1, 2017, pp. 242–248, http://dx.doi.org/10.1520/JTE20160161. ISSN 0090-3973 ABSTRACT Besh-Ghardash Dam is located 5 km from Bojnourd city in North Khorasan Province, Iran. This research investigated the use of a plastic concrete. Because of a lack of specified standards for such materials, there is a serious need to evaluate effects from the amount and the quality of concrete aggregates (fine and coarse gravel and sand), cement, water, and bentonite on mechanical properties. This study looked at the effect of the ratio of mixture proportions and cement, as well as the materials’ quality, such as the type of bentonite on compressive strength, modulus of elasticity, and permeability of plastic concrete. The results showed that by decreasing the ratio of term activity in bentonite reduced compressive strength, because of an increase in free water when other components were held stable. The effect of the cement has a direct effect on elastic modulus, as well as the compressibility of plastic concretes. The results showed that there is a direct effect of the cement on the permeability of such plastic concrete. Keywords aggregate, plastic concrete, compressive strength, permeability, modulus elasticity Introduction Besh-Ghardash dam is situated on Besh-Ghardash road 5 km from Bojnourd City in North Khora- san Province, Iran (Fig. 1). Plastic concrete is applied in many structures, such as in a cutoff wall, a Manuscript received March 20, 2016; accepted for publication November 2, 2016; published online December 22, 2017. 1 Department of Civil Engineering, Payame Noor University, P.O. Box 19395-4697, Tehran, Iran, e-mail: [email protected] 2 Department of Civil Engineering, Payame Noor University, P.O. Box 19395-4697, Tehran, Iran, e-mail: [email protected] Copyright V C 2016 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. 242 Journal of Testing and Evaluation doi:10.1520/JTE20160161 / Vol. 45 / No. 1 / January 2017 / available online at www.astm.org Copyright by ASTM Int'l (all rights reserved); Tue Sep 17 03:56:46 EDT 2019 Downloaded/printed by Curtin Univ Of Technology (Curtin Univ Of Technology) pursuant to License Agreement. No further reproductions authorized.
Effects of Cement, Different Bentonite, and Aggregates on Plastic Concrete in Besh-Ghardash Dam, Iran
Apr 28, 2023
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