铜渣-水泥复合胶凝材料力学性能研究

铜渣以5%、10%、15%的比例取代水泥制备铜渣-水泥复合胶凝材料.研究铜渣对水泥基胶凝材料标准稠度用水量、凝结时间、净浆抗压强度、胶砂抗折与抗压强度的影响,并利用XRD、TG/DSC和SEM-EDS技术手段分析掺入铜渣后水泥基胶凝材料物相和微观形貌的变化.研究结果表明:铜渣掺入会使水泥胶凝材料的标准稠度用水量增加,凝结时间延长,一定程度上提高水泥胶凝材料的抗折、抗压强度;铜渣-水泥胶凝材料的主要水化产物和水泥胶凝材料类似,并有Fe(OH)3/Fe(OH)2凝胶生成.铜渣-水泥复合胶凝材料微观结构较水泥胶凝材料密实.

Mechanical Properties of Portland Cement-Copper Slag Compound Cementitious Material

Portland cement-copper slag compound cementitious material was prepared by replacing Portland cement (PC) by copper slag at the levels of 5%, 10% and 15%.Water required for normal consistency, setting time, compressive strength of paste specimens, flexural and compressive strengths of mortar specimens of the PC-copper slag compound system were studied.XRD,TG/DSC and SEM-EDS were also used to analyze the hydration products and microstructure of the PC-copper slag system.The results show that the use of copper slag increase the water required for normal consistency and setting time of PC.The flexural and compressive strength of the material are also generally increased after adding copper slag.In addition to the generation of Fe(OH)3/Fe(OH)2 gel, the main hydration product of Portland cement-copper slag compound cementitious material is similar to that of PC.Compared to PC, Portland cement-copper slag compound cementitious material the microstructure of the latter became denser.