锂渣掺量对水泥基复合材料性能的影响

为了研究锂渣掺量对水泥基复合材料性能的影响,设计了6组试验,水胶比0.35、砂胶比0.3和纤维掺量2％保持不变,锂渣掺量分别为0.2、0.3和0.4,粉煤灰作为对比组,进行单轴拉伸试验和抗压试验,并运用灰色关联法对试验结果进行分析.结果表明:锂渣掺量在0.3以下时,和易性良好,达到0.4时,黏稠度增强,和易性变差;随着锂渣和粉煤灰掺量的增加,复合材料的伸长率、抗拉强度和抗压强度先增大后减小,掺量在0.3时最优;灰色关联分析表明,锂渣和粉煤灰掺量对伸长率和抗拉强度有明显的影响,对抗压强度有一定影响.可见,用锂渣代替粉煤灰进行水泥基复合材料的配制是可行的.

Influence of Lithium Slag Content on Properties ofCement Based Composites

In order to study the influence of lithium slag content on the cement based composites, six groups of experiments were designed, keeping water binder ratio 0.35, sand binder ratio 0.3 and fiber content 2% unchanged, and the lithium slag content was 0.2, 0.3 and 0.4 respectively, and fly ash was used as control group, and uniaxial tensile test and compression test were carried out, then the grey correlation method was used for analysis of the test. The results show that when the content of lithium slag is below 0.3, and the workability is good, once above 0.4, the viscosity is enhanced and the workability is poor; With the increase of lithium slag and fly ash content, the elongation, tensile strength and compressive strength of the composites increase first and then decrease, and the optimum content is 0.3; Grey correlation analysis shows that the content of lithium slag and fly ash has obvious influence on elongation and tensile strength, and has certain influence on compressive strength. In conclusion, it is feasible to use lithium slag instead of fly ash to prepare cement based composites.