摘要
为了研究超细磷渣粉对水泥性能的影响,测试了普通磷渣,4μm、2μm超细磷渣-水泥复合胶凝材料的标准稠度用水量、凝结时间、水化热、胶砂抗压强度。结果表明:与纯水泥相比,超细磷渣掺入使复合胶凝材料标准稠度用水量增大5.6%~12.6%,凝结时间延长;普通磷渣-水泥复合胶凝材料相比于纯水泥水化速率缓慢,第二水化放热峰时间延迟8.26 h;超细磷渣-水泥复合胶凝材料相比于普通磷渣-水泥复合胶凝材料水化放热速率增大,第二水化放热峰提前5.5 h,超细磷渣-水泥复合胶凝材料120 h水化放热总量接近纯水泥;超细磷渣-水泥复合胶凝材料3 d、7 d抗压强度与水泥胶砂强度持平,28 d抗压强度超过水泥胶砂强度。超细化处置可增强磷渣的活性,促进磷渣本身的火山灰反应,提高水泥基材料性能,对实现磷渣的资源化利用具有重要意义。
In order to study the effect of ultrafine phosphorus slag powder on the properties of cement,the water consumption of normal consistency,setting time,hydration heat and compressive strength of the ordinary phosphorus,4μm and 2μm ultrafine phosphorus slag cement composite cementitious material were tested.The results show that compared with pure cement,the water consumption of normal consistency of composite cementitious material increases by 5.6%-12.6%and the setting time is prolonged.Compared with pure cement,the hydration rate of the ordinary phosphorus slag cement composite cementitious material is slower,and the heat release peak time of the second hydration is delayed by 8.26 h.Compared with the ordinary phosphorus slag cement composite cementitious material,the second hydration heat release peak of ultrafine phosphorus slag cement composite cementitious material is 5.5 h in advance,and the hydration heat release rate increases.The total hydration heat release amount of ultrafine phosphorus slag composite cementitious material is close to pure cement at 120 h.The 3 d and 7 d compressive strength of ultrafine phosphorus slag cement composite cementitious material are equal to that of cement mortar,and the 28 d compressive strength of ultrafine phosphorus slag cement composite cementitious material exceeds that of cement mortar.Ultrafining enhances the activity of phosphorus slag,promotes the pozzolanic reaction of phosphorus slag and improves the performance of cement-based materials,it has great significance to realize the resource utilization of phosphorus slag.
作者
苏泽淳
曾三海
郑正旗
贺行洋
苏英
王迎斌
SU Zechun;ZENG Sanhai;ZHENG Zhengqi;HE Xingyang;SU Ying;WANG Yingbin(School of Civil Engineering and Environmental Sciences,Hubei University of Technology,Wuhan 430068,China;Building Waterproof Engineering and Technology Research Center of Hubei Province,Hubei University of Technology,Wuhan 430068,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第8期2536-2541,共6页
Bulletin of the Chinese Ceramic Society
基金
国家重点研发计划(2019YFC1907100)。
关键词
磷渣
超细化
水化特性
力学性能
phosphorus slag
ultrafine
hydration characteristic
mechanical property
