DBPapers
DOI: 10.5593/SGEM2014/B62/S26.046

THE AGGREGATE INFLUENCE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF THE CONCRETES FOR USE AS GAMMA RADIATION SHIELDING

M. Gheorghe, N. Saca, L. Radu, A. Moanta, V. Fugaru
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 355-362 pp

ABSTRACT
This paper presents an experimental study on physical and mechanical properties of the concretes prepared with different type of cements and aggregates. The reference concretes carried out with river aggregate and with two type of cement namely ordinary Portland cement and composite Portland cement with 20% Ba compounds addition. The high-density concretes have been prepared with ordinary Portland cement and high density aggregates as hematite and mineral steril with barite from barite rock processing. The concrete gamma linear attenuation coefficients were tested for γ-rays energy of 0.37 MeV (Ir-192), 0.663 MeV (Cs-137) and 1.25 MeV (Co-60). The concrete density, ultrasonic wave velocity and compression strengths were tested too. The fresh and hardened concrete properties were considerably influenced of the water/cement ratio and of fine particles/coarse aggregate volume ratios. The high concretes density significantly favored the attenuation of gamma rays energy.

Keywords: high density aggregate, heavy concrete, gamma linear attenuation
coefficients