Radioactivity in Building Materials and Assessment of Risk of Human Exposure in the Tiruchirappalli District of Tamil Nadu, India

Pillai, G. Sankaran; Hameed, P. Shahul; Khan, Sabaz Ali

doi:10.1061/(asce)hz.2153-5515.0000320

Cited by 10 publications

(5 citation statements)

References 7 publications

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“…The determination of this radioactivity is essential for any use of construction materials. Indeed, this radioactivity must not exceed the tolerated limit set at Raeq=370 Bq/kg ( [28]) in order to avoid posing radiological risks to human health.…”

Section: Radioactivitymentioning

confidence: 99%

“…Let consider ARa, Ath and Ak, respectively the specific activities of 226 Ra, 232 Th, and 40 K. To be able to estimate the total gamma activity of a building material, the Radium-Equivalent Activity (Bq/kg) can be estimated by the Equation 1 [28].…”

Section: Radium-equivalent Activity (Raeq)mentioning

confidence: 99%

“…Building materials at a height of 1 m above the earth's surface provides a gamma dose rate that can be estimated using the same conversion factors as in [28] (Equation 2).…”

Section: Absorbed Dose Rate (Dɣ)mentioning

confidence: 99%

“…The annual effective dose rates to the general public is estimated using the following expression ( [28]):…”

Section: Indoor and Outdoor Annual Effective Dose (Ein And Eout)mentioning

confidence: 99%

“…The gamma dose rate DƔ obtained for the PG are higher than the suggested limit value. However, Tunisian Phosphogypsum registers a much lower level of absorbed gamma dose rate than Indian PG characterised by 198.5 nGy/h ( [28]). The external hazard index, the indoor effective dose and outdoor effective dose of all materials were well within the safety limit (<1).…”

Section: Radioactivity Level Index (Iɣ)mentioning

confidence: 99%

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Pressed non-fired bricks from phosphogypsum waste for non-load bearing wall

Kammoun

2021

CEJ

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In several countries of the world, phosphogypsum represents a large quantity of waste that poses serious problems of environmental and groundwater pollution. This study aims at recovering phosphogypsum, in its raw state without treatment, in the manufacture of non-load-bearing non-fired bricks. The study starts with the analysis of the radionuclide activity of the materials constituting the bricks, in particular phosphogypsum, in order to avoid any human health problems after the manufacture and use of the bricks. Then, several compositions are tested with several preservation methods in order to optimize the composition. The physical, chemical and mechanical resistance is determined. The results show the possibility to produce non-load-bearing bricks based on untreated phosphogypsum which comply with the standards requirements, using low energy. Indeed, among the considered mixtures, two compositions (60% of PG and of 75% of PG) perfectly verify the physical and mechanical tests. Also, storage of the mixtures for two days in the laboratory and then three days in an oven at 70°C, allows to obtain the best resistance to compression. Thus, the obtained resistance is much higher than the minimum value required for non-load-bearing bricks.

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Section: Radioactivitymentioning

confidence: 99%

Section: Radium-equivalent Activity (Raeq)mentioning

confidence: 99%

“…Building materials at a height of 1 m above the earth's surface provides a gamma dose rate that can be estimated using the same conversion factors as in [28] (Equation 2).…”

Section: Absorbed Dose Rate (Dɣ)mentioning

confidence: 99%

“…The annual effective dose rates to the general public is estimated using the following expression ( [28]):…”

Section: Indoor and Outdoor Annual Effective Dose (Ein And Eout)mentioning

confidence: 99%

Section: Radioactivity Level Index (Iɣ)mentioning

confidence: 99%

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