柠檬酸渣掺合料对水泥基胶凝材料性能影响的研究

Study on the effect of citric acid residue admixture on the performance of cement-based cementitious materials

为探索柠檬酸工业废渣与粉煤灰、矿粉复掺对水泥基胶凝材料基本性能的影响,采用正交试验结合等体积替代方法,研究几种掺合料对胶砂抗折强度、抗压强度、胶砂流动度等基本性能的影响,对其矿物成分、微观形貌等做了进一步分析研究,探索各种掺合料的作用机理.结果表明:不同掺量的柠檬酸渣与粉煤灰、矿粉复掺对胶砂强度及流动度均具有显著的影响,在水泥及粉煤灰掺量相对变化不大的情况下,矿渣与柠檬酸渣掺量体积比为4.2∶5.8时所获得的抗折、抗压强度最大,通过胶砂性能及矿物组成、微观分析,得出三元掺和料体系下柠檬酸渣具有良好的激发作用,不仅可以作为激发剂使用,而且还具有一定的体积稳定性作用,进而使获得的水泥基胶凝材料拥有优良的力学性能、流动度以及体积稳定性.

In order to explore the influence of citric acid industrial waste slag.fly ash,and slag on the basic properties of cement-based cementitious materials,orthogonal test design combined with equal volume substitution methods were used to study the effect of several admixtures on the flexural resistance of mortar.The influence of basic properties such as strength,compressive strength,and fluidity of mortar has been further analyzed for its mineral composition and microscopic morphology,and the mechanism of action of various admixtures has been explored.The results show that the compounding of citric acid slag,fly ash,and slag powder in different content has a significant effect on the strength and fluidity of mortar.Under the condition that the cement and fly ash content does not change much,the slag and fly ash When the volume ratio of citric acid residue is 4.2∶5.8,the maximum flexural and compressive strength is obtained.Through mortar performance,mineral composition and microscopic analysis,it is concluded that the citric acid residue under the ternary admixture system Has a good stimulating effect,not only can be used as an activator,but at the same time it also has a certain volume stability,so that the obtained cement-based cementitious material has excellent mechanical properties,fluidity and volume stability.