Development of High-Compressive Heavyweight Concrete Based on Portland Cement and Supplementary Cementitious Materials

Abstract:

The manufacture of optimized heavyweight concrete takes into consideration the type of aggregates, composition of blended cement, water-to-cement ratio, additives etc. The density of concrete depends mainly on the specific gravity of the used aggregates. Generally, concretes with specific gravities higher that 2600 kg m^-3 are called heavyweight concretes and aggregates with specific gravity higher than 3000 kg m^-3 are considered as heavyweight aggregates according to EN [1,2]. Concrete is a low cost material and easy to produce in varied compositions when compared to other shielding materials based on ceramics [3]. It is composed of a well-proportioned mixture of light and heavy nuclei. It is therefore efficient both in absorbing gamma rays and in slowing down fast neutrons by elastic and inelastic scattering [2]. Light materials, especially hydrogenous materials which contained in the water of hydration of the set cement (concrete) attenuate fast neutrons as a consequence of the high cross-section of hydrogen [4].

• Periodical: Materials Science Forum (Volume 955)
• Pages: 44-49
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.955.44
• Online since: May 2019
• Authors: Janette Dragomirová*, Martin Palou
• Keywords: Barite, Heavyweight Concrete, High Compressive Strength, Hydration, Magnetite

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