碱激发矿渣-钢渣复合胶凝体系的性能研究  

Study on properties of alkali-activated slag-steel slag composite cementitious system

作　　者：郭启龙 杜磊 华亮 高敏 刘荣浩 艾妮萨加帕尔 GUO Qilong;DU Lei;HUA Liang;GAO Min;LIU Ronghao;Ainisajiapaer(College of Civil Engineering,Northwest University for Nationalities,Lanzhou 730124,China;Gansu Key Laboratory of New Building Materials and Building Energy Conservation,Lanzhou 730124,China)

机构地区：[1]西北民族大学土木工程学院,甘肃兰州730124 [2]甘肃省新型建材与建筑节能重点实验室,甘肃兰州730124

出　　处：《新型建筑材料》2024年第1期108-113,共6页New Building Materials

基　　金：甘肃省优秀研究生创新之星项目(2021CXZX-693);甘肃省自然科学基金项目(20JR5RA510);西北民族大学引进人才项目(Z14013)。

摘　　要：以氢氧化钠和水玻璃为激发剂制备矿渣-钢渣复合胶凝材料,研究矿渣掺量、碱当量和水玻璃模数对复合胶凝材料抗压强度的影响,并采用XRD、SEM对硬化试样的显微形貌和水化产物组成进行了分析。结果表明:随矿渣掺量减少,抗压强度降低。随碱当量的增加,抗压强度先提高后降低,碱当量为11%时强度达到最高。随水玻璃模数的增大,抗压强度先提高后降低,当水玻璃模数为1.2时强度达到最高。水化产物主要为CaCO3、C-S-H凝胶、C-A-S-H凝胶、托贝莫来石及RO惰性相。Mineral slag-steel slag composite cementitious material was prepared by using sodium hydroxide and sodium silicate as activators.The effects of slag content,alkali equivalent and sodium silicate modulus on the compressive strength of hardened test blocks were studied.The microstructure and the composition of hydration products of the samples were analyzed by XRD and SEM.The results show that the compressive strength decreases with the decrease of mineral slag content.With the increase of alkali equivalent,the compressive strength first increases and then decreases.The strength reaches the highest when the alkali equivalent is 11%.With the increase of the modulus of sodium silicate,the compressive strength first increases and then decreases.The compressive strength of each age reaches the highest when the modulus of sodium silicate is 1.2.The hydration products of alkali activated slag/steel slag are mainly composed of CaCO3,hydrated C-S-H gel,hydrated C-A-S-H gel,tobermorite and RO phase.

关 键 词：抗压强度 碱当量 水化C-S-H凝胶 托贝莫来石 

分 类 号：TU526[建筑科学—建筑技术科学]