加速碳化作用下水泥基材料222Rn析出的数值预测

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-09-25 DOI:10.1007/s10967-024-09773-3

Rong Yang, Ming Lan, Shengyang Feng, Yongming Zhong

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引用次数: 0

摘要

提出了一种结合碳化和氡迁移的模型来模拟标准加速碳化条件下混凝土中氡的析出。考虑CO2在多孔介质中的扩散和反应消耗，以及氡在多孔介质中的扩散和衰变，得到了测试块的表面氡呼出率，并对氡扩散系数进行了修正。建立了标准加速碳酸化条件下校正因子与碳酸化深度和碳酸化年龄的函数关系。修正后的模拟值与实验值吻合较好。

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Numerical prediction of 222Rn exhalation from cement–based materials under accelerated carbonation

A model combined with carbonization and radon migration is proposed to simulate radon exhaled from concrete under standard accelerated carbonization. Considering the diffusion and reaction consumption of CO₂ as well as the diffusion and decay of radon in porous media, the surface radon exhalation rate of the test block is obtained, and the radon diffusion coefficient was modified. The functional relationship between the correction factor and the carbonation depth and carbonation age period under standard accelerated carbonation conditions was established. The revised simulated value was in good agreement with the experimental value.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.