使用 CEN 室内模型评估添加粉煤灰的 M300 和 M400 级混凝土中的放射性和剂量

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

Construction and Building Materials Pub Date : 2025-04-19 DOI:10.1016/j.conbuildmat.2025.141350

Huynh Truc Van , Vu Ngoc Ba , Truong Thi Hong Loan , Huynh Van Tran Sang , Nguyen Ba Doan Trinh , Nguyen Quang Dao , Le Cong Hao , Huynh Truc Phuong

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引用次数: 0

摘要

当粉煤灰用于建筑材料时，它会增加对伽马辐射和氡的暴露。本研究旨在评价掺加粉煤灰的M300和M400级混凝土样品的放射性浓度和暴露剂量。为此，我们使用了HPGe光谱仪和RESRAD-BUILD模拟程序。结果表明，226Ra和232Th的平均活度低于参考值，而40K的平均活度超过UNSCEAR限值。M300和M400的研究结果分别比全球室内吸收的伽马剂量平均值高1.5倍和1.6倍。然而，两种混凝土等级在住宅和办公场所的年有效剂量仍然低于1.0 mSv y−1的人口限值。多因素分析表明，氡和总剂量受226Ra和232Th活性的影响，而不受40K活性的影响。此外，氡剂量受到空气交换率的影响，空气循环的增加导致氡剂量的减少。总体而言，结果表明，使用M300和M400级混凝土样品建造的房屋，混合粉煤灰含量为0 %至50 %，对个人生活和工作是安全的。

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Assessment of radioactivity in concrete grades M300 and M400 with fly ash addition and dose evaluation using the CEN room model

When fly ash is used in construction materials, it can increase exposure to gamma radiation and radon. This study aimed to evaluate the radioactive concentrations and exposure doses in concrete samples of grades M300 and M400 with added fly ash. We utilized an HPGe spectrometer and the RESRAD-BUILD simulation program for this purpose. The results indicated that the average activities of ²²⁶Ra and ²³²Th were below the reference values, while the average activity of ⁴⁰K exceeded the UNSCEAR limit. The findings for M300 and M400 were 1.5 and 1.6 times higher, respectively, than the global average for indoor absorbed gamma dose. However, the annual effective dose in residential and office spaces for both concrete grades remained below the 1.0 mSv y⁻¹ limit for the population. Multivariate analysis showed that radon and total dose were affected by the activities of ²²⁶Ra and ²³²Th, but not by ⁴⁰K. Additionally, the radon dose was impacted by the air exchange rate, with an increase in air circulation leading to a reduction in the radon dose. Overall, the results indicate that living and working in houses constructed with concrete samples of grades M300 and M400, mixed with fly ash content ranging from 0 % to 50 %, was safe for individuals.

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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.