Application of the Heavy-Weight Concrete as a Fire-Resistance Nuclear Concrete

Abstract

The application of ionising radiations became necessary and valuable for various reasons, i.e., electricity generation, medical treatment, agriculture, industry and scientific research. Nuclear power plants are one of the most complex radiation-shielding structures. Special design and building materials are required to enhance safety and reduce the risk of harmful radiation emissions. The construction of nuclear buildings must fulfil radiation attenuation, strength, fire resistance and durability which are cost-effective properties. Therefore, heavy-weight concrete (HWC) can fulfil these requirements due to its cost-effectiveness and good physical, mechanical and thermal properties. The research aims to introduce nuclear buildings, their application and their behaviour under elevated temperatures. Also, the research aims to review the heavy-weight concrete and heavy aggregate and their essential role in developing neutron-shielding and fire-resistant materials and prove this fact through investigations. However, the aim of this research was to investigate heavy-weight concrete’s physical, mechanical and thermal properties at different elevated temperatures. Whereas magnetite heavy-weight concrete is the main concern. Result showed the good thermal resistance capability of magnetite concrete up to 800°C, compared to the basalt and quartz concrete. Raising the water-cement ratio (w/c ratio) of the heavy-weight magnetite concrete reduced the risk of explosive spalling at 800°C. Whereas adding metakaolin and boron carbide improved the mechanical properties of magnetite concrete up to 500°C.