粉煤灰对双膨胀水泥膨胀性能的影响

Effects of Fly Ash on Expansion of Double-expansive Cement

本文研究粉煤灰对双膨胀水泥水化和膨胀性能的影响。结果表明 ,粉煤灰对双膨胀水泥早期和后期膨胀都有显著的抑制作用 ,对早期膨胀的抑制作用与形成钙矾石的化学环境改变以及钙矾石形成提前结束有关 ,对后期膨胀的抑制作用与其抑制水泥浆体中水镁石的形成一致。

This paper is concerned with effects of fly ash on the hydration and expansive property of double expansive cement. The result shows that fly ash restrains both the early and the later expansion, the former is related to the change of chemical condition and the shift to an earlier finishing time of ettringite formation, and the later is consistent with the effect of fly ash on the formation of Mg(OH) 2.