Understanding the effects of different aggregates on the neutron and gamma radiation shielding properties of ultra-high performance concrete using Monte Carlo methods

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-13 DOI:10.1016/j.conbuildmat.2025.140375

Peng Zhou , Qingjun Ding , Dongdong Chen , Jun Yang , Shaolong Huang , Jinhui Li

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引用次数: 0

Abstract

The aim of this study was to investigate the mechanical properties and shielding performance of UHPC produced with magnetite, barite, hematite, and limonite aggregates. The linear attenuation coefficients (μ) of UHPC containing different aggregates have been calculated using both the Geant4 program and XCom code, and compared with experimental data. In addition, the mechanical properties, density, buildup factors, and the effective fast neutron removal cross-section (∑_R) of these UHPC specimens were also investigated. It was concluded that the μ values of samples containing magnetite, barite, and hematite increased with increasing aggregate content, while the μ values of limonite-loaded UHPC initially increased and then decreased with the increase of aggregate content. The HVL and TVL values for samples containing magnetite, barite, and hematite aggregates, as calculated by the Genat4 code, decreased linearly with the increase of aggregate content. It should be noted that when a single aggregate was utilized, the ∑_R value of the UHPC sample containing magnetite was the largest, followed by hematite, and barite was unsuitable as an aggregate for neutron shielding in UHPC. Furthermore, the EABF and EBF values for UHPC containing different aggregates were lower than those produced with quartz sand, with the exception of a few specific values. The findings of this research will provide a reference for the design of radiation-resistant UHPC in the future.

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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.