摘要
比较NaOH、NaOH+Na_(2)SiO_(3)溶液、NaOH+纳米二氧化硅溶液3种碱激发剂对碱活化磷渣基复合胶凝材料(AAPGF)性能的影响规律。采用扫描电子显微镜(SEM)、X射线衍射(XRD)仪和红外光谱测试(FTIR)等手段,研究了AAPGF的流动性、凝结时间、力学性能、水化产物形貌等变化。结果表明,不同的激发剂对胶凝材料的性能产生不同的影响。NaOH溶液作为激发剂,胶凝材料凝结时间最长。NaOH+Na_(2)SO_(3)溶液作为激发剂时,胶凝材料能够获得较高的强度,28 d抗压强度达到72.7 MPa。NaOH+纳米二氧化硅溶液作激发剂时,抗折强度最高,28 d抗折强度可达12.11 MPa。在3种激发剂激发下的水化产物均以水化硅酸钙(C-S-H)、水化硅铝酸钙(C-A-S-H)为主。NaOH+纳米二氧化硅(NS)溶液中NS不仅能够提供活性物质,而且能够产生微填充效应。
The effects of alkali activators NaOH,NaOH+Na_(2)SiO_(3) solution and NaOH+nano-silica solution on the properties of alkali-activated phosphorus slag based composite(AAPGF)were compared.The fluidity,setting time,mechanical properties and morphology of hydration products of AAPGF were studied by scanning electron microscopy(SEM),X-ray diffractometer(XRD)and infrared spectroscopy(FTIR).The results show that different activators have different effects on the properties of the materials.Specifically,NaOH solution as the activator has the longest coagulation time.When NaOH+Na_(2)SiO_(3) solution is used as the activator,high strength can be obtained,and the 28d compressive strength reaches 72.7 MPa.When NaOH+nano-silica solution is used as activator,the bending strength is the highest,and the bending strength of 28 d can reach 12.11 MPa.The hydration products stimulated by the three activators are mainly C-S-H and C-A-S-H.NS in NaOH+nano-silica solution can not only provide active substances but also produce micro-filling effect.
作者
张延年
王立龙
杨道魁
汪青杰
苏艳军
辛全明
Zhang Yannian;Wang Lilong;Yang Daokui;Wang Qingjie;Su Yanjun;Xin Quanming(School of Civil Engineering,Dalian Jiaotong University,Dalian,Liaoning 116028;School of Civil Engineering,Shenyang Jianzhu University,Shenyang,Liaoning 11168;School of Science,Dalian Jiaotong University,Dalian,Liaoning 116028;Northeast China Architecture Design&Research Institute Co.,Ltd.,Shenyang,Liaoning 110006)
出处
《非金属矿》
2024年第1期29-33,共5页
Non-Metallic Mines
基金
国家自然科学基金重点项目(52234004)
沈阳市科技计划项目(23-407-3-02)。
关键词
磷渣
激发剂
全固废胶凝材料
水化特性
phosphorus slag
activator
solid waste cementing material
hydration characteristics