基于正交试验的掺特细砂混凝土力学性能试验研究

Experimental study on mechanical properties of extra fine sand based on orthogonal test

为研究不同掺量特细砂对混凝土性能的影响,文章通过正交试验法分析了水胶比、砂率、特细砂掺量3个因素对混凝土抗压强度的影响。研究表明:特细砂掺量变化对混凝土抗压强度影响较为显著,仅次于水胶比,砂率对抗压强度影响并不明显。低水胶比条件下,20%特细砂掺量可获得较高抗压强度;特细砂掺量变化与混凝土抗压强度相关性一般。

In order to study the effect of different content of extra-fine sand on the performance of concrete,the effect of three factors on the compressive strength of concrete was analyzed by orthogonal test.The results show that the influence of the change of the content of the fine sand on the compressive strength of the concrete is significant,only after the ratio of the water and the sand,the effect of the sand ratio on the compressive strength is not obvious.Under the condition of low water-to-water ratio,the high compressive strength of 20%extra fine sand is obtained,and the variation of the content of fine sand and the compressive strength of the concrete is general.