矿物掺合料对低水胶比水泥基材料塑性开裂的影响

Effect of mineral admixtures on plastic cracking of cement-based materials with low water-binder ratio

采用平板约束法并结合图像分析技术研究了矿物掺合料对低水胶比水泥基材料塑性开裂的影响。结果表明:硅灰显著增大了低水胶比水泥基材料的塑性开裂面积和平均宽度,通过复掺粉煤灰或磨细矿粉均可大幅度降低低水胶比水泥基材料塑性开裂风险。

The effect of mineral admixture on the plastic cracking of cement-based materials with low water- binder ratio is investigated by the slab constraint method and the image analysis technique. The results show that crack area and average crack width of cement-based materials significantly increase by the addition of silica fume, and the plastic cracking risk largely reduces by adding fly ash or slag.