磷石膏/矿粉复合过硫胶凝材料的制备研究  

Study of Phosphogysum/Slag Compound Persulfate Cementitious Material

作　　者：万惠文[1] 王银[1] 戴鹏[1] 董群喜[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2014年第3期23-27,共5页Journal of Wuhan University of Technology

基　　金：国家高技术研究发展计划("863计划")(2012AA061704)

摘　　要：通过研究磷石膏、硫铝酸盐水泥熟料、碱激发剂等组分掺量对过硫胶凝材料体系物理力学性能的影响,借助XRD、SEM等微观测试手段对水化产物及机理进行分析探讨,确定了过硫胶凝材料组成的最佳配合比。结果表明:5%的硫铝酸盐水泥熟料、30%的磷石膏、63%的矿粉、2%的碱激发剂制备出的磷石膏/矿粉复合过硫胶凝材料标准稠度用水量为30.8%,初凝时间为312min,终凝时间为514min,3d抗压强度可达13MPa,28d抗压强度超过48MPa。微观分析表明,在该配比下制备的过硫胶凝材料主要水化产物为钙矾石和C-S-H凝胶,水化28d时钙矾石生成量较大,结构较为致密,强度大幅度提高。The influences of the addition of phosphogysum,Sulphoaluminate cement clinker,alkali-activated and other components on the strength of persulfate cementitious material were studied,and the hydration products and mechanism were also discussed by XRD.SEM and other micro-analysis measurements, then the best fit of persulfate cementitious ma- terial was determined. The experimental results show that compressive strength of phosphogysum/slag compound persul- fate cementitious material prepared by a combination of sulphoaluminate cement clinker, phosphogysum, slag and alkali- activator with ratio （by mass） of 5 ： 30 ： 63 ： 2 with water requirement of 30.8% would he up to 13 MPa at 3-day and e- ven 48 MPa at 28-day. The initial setting time and the final setting time are 312 and 514 rains, respectively. Microscopic a- nalysis indicates that the main hydration products are ettringite and C-S-H gel. A large amount of ettringite formed at 28 days leads to compact structure and higher strength.

关 键 词：磷石膏 硫铝酸盐水泥熟料 碱激发剂 过硫胶凝材料 钙矾石 

分 类 号：TU528[建筑科学—建筑技术科学]