Modified ultra-high-performance concrete with boron carbide for neutron and gamma radiation shielding

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-14 DOI:10.1016/j.conbuildmat.2025.140421

N. Ramli , Raizal S.M. Rashid , N.A.M. Nasir , Y.L. Voo , N.M. Azreen , J.A. Karim

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Abstract

Four Ultra-High-Performance Concrete (UHPC) modified mixes were studied with 0 %, 5 %, 10 %, 15 %, and 20 % of boron carbide as aggregates replacement for silica sand denoted as UREF, UBC5, UBC10, UBC15, and UBC20, respectively. Overall, as the boron carbide content increases, workability decreases while density improves. The UBC20 mix showed a 14.77 % reduction in compressive strength compared to the UREF. Nonetheless, the compressive strength still exceeded 140 MPa at 28 days. Boron carbide demonstrated better radiation shielding where the shielding capability for the UBC20 mix shielded gamma and neutron was 16.89 % with ⁶⁰Co source, 5.23 % with ¹³⁷Cs source, as well as 37.48 % with neutron source, respectively, better than the UREF specimen. These findings demonstrate that increasing boron carbide content progressively enhances the shielding properties of the concrete. However, caution is advised with higher boron carbide inclusion, as it may significantly reduce strength.

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用碳化硼改性超高性能混凝土屏蔽中子和伽马辐射

研究了四种高性能混凝土（UHPC）改性混凝土，分别以0 %、5 %、10 %、15 %和20 %的碳化硼代替硅砂骨料，分别为UREF、UBC5、UBC10、UBC15和UBC20。总体而言，随着碳化硼含量的增加，可加工性降低，而密度提高。与UREF相比，UBC20混合物的抗压强度降低了14.77 %。尽管如此，28天的抗压强度仍然超过140 MPa。碳化硼对UBC20样品的屏蔽效果较好，60Co源对UBC20样品屏蔽γ和中子的能力分别为16.89 %、5.23 %和37.48 %，均优于UREF样品。这些发现表明，增加碳化硼含量逐渐提高混凝土的屏蔽性能。然而，建议使用较高的碳化硼夹杂物，因为它可能会显著降低强度。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.