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The mechanism of the effect of mineral admixtures on the expansion of alkali-silica reaction

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Abstract

On the base of the influence rule of silica fume, slag and fl y ash on alkali-silica reaction under the condition of 70 °C, the mechanism of the effect of mineral admixtures on alkali-silica reaction is studied further in the paper. The results show that the effects of mineral admixtures on alkali-silica reaction are mainly chemistry effect and surface physichemistry effect. Under suitable condition, the chemistry effect may make alkali-silica reaction to be inhibited effectively, but the physichemistry effect only make alkali-silica reaction to be delayed. The chemistry effect and the physichemistry effect of minerals admixture are relative to the content of Ca(OH)2 in system. Under the condition that there is a large quantity of Ca(OH)2, mineral admixture cannot inhibit alkali-silica reaction effectively. Only when Ca(OH)2 in the system is very less, it is possible that mineral admixture inhibits alkali-silica reaction effectively.

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Authors and Affiliations

  1. Department of Civil Engineering and Architecture, Zhongyuan University of Technology, Zhengzhou, 450007, China

    Aiqin Wang  (王爱勤)

  2. Institute of Material and Structure Research, Henan University, Kaifeng, 475004, China

    Jishou Niu & Chengzhi Zhang  (张承志)

Authors
  1. Aiqin Wang  (王爱勤)
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  2. Jishou Niu
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  3. Chengzhi Zhang  (张承志)
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Correspondence to Chengzhi Zhang  (张承志).

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Wang, A., Niu, J. & Zhang, C. The mechanism of the effect of mineral admixtures on the expansion of alkali-silica reaction. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 23, 376–380 (2008). https://doi.org/10.1007/s11595-007-3376-3

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  • DOI: https://doi.org/10.1007/s11595-007-3376-3

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