钢渣-粉煤灰-脱硫石膏地质聚合物的工程地质特性研究  

Engineering geological characteristics of steel slag-fly ash-desulfurized gypsum geopolymer

作　　者：高宇航 胡广青[1] 李书钦 占国艳 GAO Yuhang;HU Guangqing;LI Shuqin;ZHAN Guoyan(Exploration and Research Institute,Bureau of Coal Geology of Anhui Province,Hefei,Anhui 230088,China;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan,Anhui 243000,China;不详)

机构地区：[1]安徽省煤田地质局勘查研究院,安徽合肥230088 [2]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000 [3]中国热带农业科学院农产品加工研究所,广东湛江524001 [4]农业农村部农产品加工质量安全风险评估实验室,广东湛江524001

出　　处：《安徽地质》2024年第3期220-225,共6页Geology of Anhui

基　　金：安徽省先进建筑材料重点实验室开放课题“多种固废协同制备复合胶凝体系材料的合成机制与应用研究”(编号:JZCL2204ZR);安徽省科技重大专项“基于多固废协同作用的选冶渣场(库)污染源头控制技术研究”(编号:201903a07020010);中央级公益性科研院所基本科研业务费专项“生物炭负载纳米零价铁对镉污染物的吸附效应及作用机制研究”(编号:1630122024016)联合资助。

摘　　要：以钢渣、粉煤灰和脱硫石膏等固废为原料,NaOH和水玻璃为碱激发剂,制备复合胶凝材料,研究碱激发剂的模数及原料成分配比对材料力学性能的影响,并结合X射线衍射仪(XRD)及扫描电子显微镜(SEM)测试结果进行水化机理分析。结果表明:当脱硫石膏掺量占比为10%,粉煤灰与钢渣掺量比例为1∶1,碱激发剂模数为1.25时,抗折、抗压强度最大,分别为5.65 MPa和20.40 MPa,XRD、SEM测试结果表明,此配比下石英的消耗量最大,原料水化完全,产生大量水化C-A-S-H凝胶包裹钙矾石,结构致密。A composite cementitious material is prepared with steel slag,fly ash and desulfurized gypsum as main raw materials,NaOH and sodium silicate as alkali-activator.The effects of the modulus of alkali-activator and the ratio of raw materials on the mechanical properties of the composite material were studied,and the hydration mechanism was analyzed by using the results of X-ray diffraction(XRD)and scanning electron microscopy(SEM).The results show that when the addition of desulfurized gypsum is 10%,the fly ash to steel slag ratio is 1∶1,and the modulus of alkali-activator is 1.25,the composite has maximum flexural and compressive strengths,5.65 MPa and 20.40 MPa,respectively,XRD and SEM test results show that with the above mix ratio,the consumption of quartz is the largest,the raw material is fully hydrated,and a large amount of hydrated C-A-S-H gel wrapped ettringite is produced,with dense structure.

关 键 词：钢渣 粉煤灰 脱硫石膏 工程地质特性 微观分析 

分 类 号：P642[天文地球—工程地质学]