掺矿渣微粉和粉煤灰的混凝土性能试验研究

Behavior tests of concrete mixed with micro slag powder and flyash

对单掺粉煤灰、单掺矿渣微粉、矿渣微粉与粉煤灰双掺的混凝土进行了多种配合比的性能试验。结果表明 ,掺粉煤灰可显著降低混凝土的单位用水量 ,改善混凝土拌和物的和易性 ,但同时也使其早期强度降低。掺矿渣微粉虽不能显著降低混凝土的单位用水量 ,但可提高混凝土的强度 ,而且在冻融循环过程中的质量损失也比掺粉煤灰混凝土的小。矿渣微粉与粉煤灰双掺 ,不仅可以改善混凝土拌和物的性能 ,而且可以提高混凝土的早期强度 ,矿渣微粉和粉煤灰双掺可达到优势互补的综合效果。

Concrete behavior tests were carried out in the light of concrete mixed with flyash, micro slag powder, flyash and micro slag powder respectively. The results demonstrate that the concrete mixed with flyash can remarkably reduce unit mixing water, and improve the workability, but the initial concrete strength decreases; the concrete mixed with micro slag powder cannot remarkably reduce unit mixing water, but can improve the concrete strength, and loss of mass in the cyclical process of freezing and thawing is less than the concrete mixed with flyash; the concrete mixed with micro slag powder and flyash can improve not only the workability, but also the initial concrete strength. So, the concrete mixed with both micro slag powder and flyash can improve comprehensively the concrete behavior.