Effect of Compressive Strength on γ-Radiation Attenuation Coefficients for High Performance Concrete

Al-Humaiqani, Mohammed M.

doi:10.7763/ijet.2013.v5.619

Cited by 19 publications

(1 citation statement)

References 12 publications

(17 reference statements)

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“…This is mainly because increasing the barite substitution, which enhances gamma-ray attenuation of RPC by means of increasing the density, adversely affected the mechanical properties in this study. On the other hand, Al-Humaiqani et al [45] reported that an increase in compressive strength of high performance heavyweight concrete containing only heavyweight aggregate (barite or hematite) could be improved gamma-ray attenuation coefficients. Moreover, it seems that even if steel fiber usage can increase the mechanical properties [14] and gamma-ray attenuation coefficient of RPC [46], the adverse effect of replacing quartz by barite on the compressive strength, modulus of elasticity, flexural strength, and fracture energy could not be prevented.…”

Section: Transmission Thicknesses Of Gamma Raysmentioning

confidence: 99%

Optimization of reactive powder concrete by means of barite aggregate for both neutrons and gamma rays

Gökçe

Yalçınkaya

Tuyan

2018

Construction and Building Materials

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High performance concrete has been often preferred in special engineering structures and in challenging composites products. Researchers have recently focused on the radiation shielding characteristics of these type concrete mixtures due to rising nuclear industry in the developing world. In the study, performance of reactive powder concrete was researched with regard to gamma-ray and neutron attenuation when its normal weight aggregate replaced with heavyweight aggregate (barite). For this purpose, reactive powder concrete mixtures were prepared 100% quartz aggregate, 100% barite aggregate and their blending 50-50%, by volume. Some physical and mechanical characteristics such as density, compressive strength, fracture energy, flexural strength and modulus of elasticity of the mixtures were determined. Gamma-ray attenuation coefficients and transmission thickness values were theoretically established for commonly known gamma energies (661.7, 1173.2 and 1332.5 keV). Optimization of the reactive powder mixtures was performed for both neutron and gamma-ray attenuation at 8 MeV. As a result, barite significantly increased the gamma-ray attenuation coefficients of reactive powder concrete. The mechanical performance of reactive powder concrete, however, was markedly reduced as a result of barite substitution. Replacement of quartz by barite aggregate has a more adverse impact on flexural strength than that of

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Section: Transmission Thicknesses Of Gamma Raysmentioning

confidence: 99%