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<p>This study aimed to reduce radon exhalation from coal fly ash-containing concrete bricks (CFA-containing concrete brick). A measurement device for determining the radon exhalation rate was designed and optimized. The device can control the temperature and humidity of the environment &#xa0;during the CFA-containing concrete bricks are measured. Two types of CFA-containing concrete bricks were designed in this study, and their radon exhalation rates were evaluated. (1) Sodium silicate (SS) and polyvinyl alcohol (PVA) were used as additives to fabricate CFA-containing concrete bricks to &#xa0;evaluate the radon inhibition performance of SS and PVA when applied to the concrete. (2) The original CFA-containing concrete bricks that had been cured for 28 days were pre-immersed in a saturated SS solution to evaluate the radon inhibition performance of the SS solution under &#xa0;different temperature and humidity conditions. The results showed that: (1) SS exhibited the best radon inhibition effect when used as an &#xa0;additive, achieving an inhibition rate of 52.95% at 35&#xa0;°C and RH 72%. (2) SS also&#xa0;exhibited the good&#xa0;radon inhibition effect when applied through immersing, yielding an inhibition rate of 15.91% at 10&#xa0;°C and RH 59%. (3) Incorporating SS as an additive into the concrete mixture was more effective in reducing the radon exhalation rate compared to immersing the CFA-containing concrete bricks in a saturated SS solution.</p>

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Inhibitory performance of polyvinyl alcohol and sodium silicate on radon exhalation from CFA-containing concrete bricks

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Bangzhi Song,
  • Yongjun Ye,
  • Guangling Chen,
  • Yifan Zong

摘要

This study aimed to reduce radon exhalation from coal fly ash-containing concrete bricks (CFA-containing concrete brick). A measurement device for determining the radon exhalation rate was designed and optimized. The device can control the temperature and humidity of the environment  during the CFA-containing concrete bricks are measured. Two types of CFA-containing concrete bricks were designed in this study, and their radon exhalation rates were evaluated. (1) Sodium silicate (SS) and polyvinyl alcohol (PVA) were used as additives to fabricate CFA-containing concrete bricks to  evaluate the radon inhibition performance of SS and PVA when applied to the concrete. (2) The original CFA-containing concrete bricks that had been cured for 28 days were pre-immersed in a saturated SS solution to evaluate the radon inhibition performance of the SS solution under  different temperature and humidity conditions. The results showed that: (1) SS exhibited the best radon inhibition effect when used as an  additive, achieving an inhibition rate of 52.95% at 35 °C and RH 72%. (2) SS also exhibited the good radon inhibition effect when applied through immersing, yielding an inhibition rate of 15.91% at 10 °C and RH 59%. (3) Incorporating SS as an additive into the concrete mixture was more effective in reducing the radon exhalation rate compared to immersing the CFA-containing concrete bricks in a saturated SS solution.