A comprehensive study on the effect of water to cement ratio on the mechanical and radiation shielding properties of heavyweight concrete

被引：69
|
作者：
Lotfi-Omran, Omid [1 ]
Sadrmomtazi, Ali [1 ]
Nikbin, Iman M. [2 ]
机构：
[1] Univ Guilan, Dept Civil Engn, Rasht, Iran
[2] Islamic Azad Univ, Dept Civil Engn, Rasht Branch, Rasht, Iran
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 229卷
关键词：
Heavyweight magnetite concrete; Mechanical properties; Water to cement ratio; Attenuation coefficients; Radiation protection; MASS ATTENUATION COEFFICIENTS; HEAVY-WEIGHT CONCRETE; GAMMA-RAY; STRENGTH PROPERTIES; BARITE AGGREGATE; FLY-ASH; X-RAYS; PERFORMANCE; ENERGY; PARAMETERS;
D O I：
10.1016/j.conbuildmat.2019.116905
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Recently, due to application of nuclear technology and the issue of protection against nuclear radiations with harmful environmental impacts such as gamma rays, heavyweight concrete is widely used in industry. On the other hand, water to cement (w/c) ratio is one of the chief factors affecting concrete behavior. Thus, in the present research, it has been attempted to explore the impact of various w/c ratios on the mechanical and shielding characteristics of heavyweight magnetite concrete. The parameters which were evaluated in this study are compressive and tensile strengths, modulus of elasticity, linear attenuation coefficient, mean free path, tenth value layer and half value layer. The Cs-137 and Co-60 radiation sources with different energy levels were applied. The obtained results indicated that mechanical and shielding characteristics and microstructure of heavyweight magnetite concrete improve with the reduction of w/c ratio. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：13
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