钛石膏-钛矿渣低熟料水泥水化反应研究  

Study on hydration reaction of titanium gypsum–titanium slag low clinker cement

作　　者：蒋勇[1,2] 苏姚彬[1] 高瑞 吴茂杰 蒋贇 焦晓飞 Jiang Yong;Su Yaobin;Gao Rui;Wu Maojie;Jiang Yun;Jiao Xiaofei(Mianyang Polytechnic,Mianyang 621000,Sichuan,China;State Key Laboratory of Environment-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621000,Sichuan,China;Sichuan Tong Xingyuan Building Material Technology Co.Ltd.,Mianyang 621000,Sichuan,China;Shanxi Polytechnic College,Taiyuan 030000,Shanxi,China)

机构地区：[1]绵阳职业技术学院,四川绵阳621000 [2]环境友好能源材料国家重点实验室,西南科技大学,四川绵阳621000 [3]四川砼兴源建材科技有限公司,四川绵阳621000 [4]山西职业技术学院,山西太原030000

出　　处：《钢铁钒钛》2023年第4期103-111,共9页Iron Steel Vanadium Titanium

基　　金：四川省功能复合材料产教融合示范基地建设项目;绵阳职业技术学院自然科学重点项目(MZ22ZD02、MZ22ZD01);山西省高校科技创新项目(2020L0765)。

摘　　要：为了探究利用钛石膏和钛矿渣制备低熟料水泥的可行性,研究其水化特性。采用钛石膏、钛矿渣、水泥熟料为主要原料,并用硅酸钠做为激发剂,配制10组低熟料水泥。对各组的抗压强度、软化系数、收缩率进行了测试,采用水化热分析、TG-DSC、XRD和SEM等测试方法对水化过程和水化产物进行了研究。结果表明,适当增加钛矿渣或水泥熟料的掺量可以提升水泥的抗压强度和软化系数,并能减小水泥的收缩。硅酸钠可以显著激发水泥的水化反应活性,促使生成更多的C-S(A)-H、AFt、CH等水化产物,从而提高抗压强度和软化系数,但过量掺入硅酸钠会造成收缩率增加。当钛石膏、钛矿渣、熟料和硅酸钠的比例为30∶55∶15∶8时,养护56 d的抗压强度达到51.3 MPa,软化系数为0.74,表现出了较好的力学性能和耐水性。In order to explore the feasibility of using titanium gypsum and titanium slag to prepare low clinker cement and study its hydration characteristics,10 groups of cement were prepared with titanium gypsum,titanium slag and cement clinker as the main raw materials and sodium silicate as the activator.The compressive strength,softening coefficient and shrinkage rate of each group were tested.The hydration process and hydration products were studied by hydration thermal analysis,TG-DSC,XRD and SEM.The results show that appropriate increase of titanium slag or clinker content can improve the compressive strength and softening coefficient of cement,and reduce the shrinkage of cement.Sodium silicate can significantly activate the hydration reactivity of cement,and promote the generation of more C-S(A)-H,AFt and CH,so as to improve the compressive strength and softening coefficient,but excessive incorporation of sodium silicate will cause an increase in shrinkage rate.With the ratio of titanium gypsum,titanium slag,clinker and sodium silicate of 30∶55∶15∶8,the compressive strength reached 51.3 MPa of 56 days after curing and the softening coefficient was 0.74,showing good mechanical properties and water resistance.

关 键 词：钛石膏 钛矿渣 水泥 熟料 硅酸钠 水化反应 

分 类 号：X757[环境科学与工程—环境工程]