论文部分内容阅读
利用正交试验设计原理,对9组不同配合比的高韧性水泥基复合材料进行了直接拉伸试验,研究了粉煤灰掺量、水胶比、砂胶比和减水剂掺量这4种因素对高韧性水泥基复合材料极限拉应变的影响。试验结果表明:高韧性水泥基复合材料的极限拉应变远大于普通混凝土,具有优异的韧性;各因素对材料极限拉应变影响的主次顺序为水胶比>粉煤灰掺量>减水剂掺量>砂胶比,其中水胶比的影响远大于其他因素;材料的极限拉应变随着水胶比或粉煤灰掺量的提高而增大,但砂胶比和减水剂掺量的影响规律不明显。
Using the principle of orthogonal experimental design, direct tensile test was carried out on nine groups of high toughness cement-based composites with different proportions, and the effects of fly ash content, water-cement ratio, sand-cement ratio and water reducer dosage were studied Influences of various factors on the ultimate tensile strain of high toughness cementitious composites. The experimental results show that the ultimate tensile strain of high toughness cement-based composites is much larger than that of ordinary concrete and has excellent toughness. The order of the factors affecting the ultimate tensile strain is the ratio of water to binder, the content of fly ash, the superplasticizer Dosage> sand ratio, of which the effect of water to binder ratio is much larger than other factors; the ultimate tensile strain of the material increases with the increase of water-binder ratio or fly ash content, The law of influence is not obvious.