摘要
以工业固废镍渣为原料,采用机械力化学制备单组分镍渣基地聚物。研究碱激发剂种类和碱掺量对镍渣基地聚物砂浆抗压强度的影响规律,结合XRD、SEM及EDS等试验对水化产物进行表征。结果表明:当碱激发剂为复掺Na_(2)SiO_(3)/Na_(2)CO_(3),w_(Na_(2))O=6.5%时,单组分镍渣基地聚物28 d抗压强度可达68.96 MPa。单掺NaOH对镍渣活性激发效果有限,单掺Na_(2)SiO_(3)和复掺Na_(2)SiO_(3)/Na_(2)CO_(3)激发效果显著,单掺Na_(2)SiO_(3)和复掺Na_(2)SiO_(3)/Na_(2)CO_(3)不能使地聚物的矿物组成发生较大改变,但可以显著提高反应体系中凝胶产物的生成量,改善地聚物微观结构的致密程度。
One-part nickel slag base geopolymer was prepared by mechanochemistry using industrial solid waste nickel slag as the raw material.The effects of the type and content of alkali activator on the compressive strength of geopolymer mortar were studied.The hydration products were characterized by XRD,SEM and EDS.Test results show that when the alkali activator is Na_(2)SiO_(3)/Na_(2)CO_(3)and the Na_(2)O equivalent is 6.5%,the 28-day compressive strength of the one-part nickel slag base geopolymer can reach 68.96 MPa.The single doping of NaOH has limited activation effect on the activity of nickel slag;the single doping of Na_(2)SiO_(3)and co-doping of Na_(2)SiO_(3)/Na_(2)CO_(3)has better potential activity to activate nickel slag.The latter cannot change the mineral composition of geopolymer obviously,but it can significantly increase generation of gel in the reaction system and improve the densification of the geopolymer microstructures.
作者
蒋远
黄华炜
毛文宫
曾清意
许利惟
JIANG Yuan;HUANG Huawei;MAO Wengong;ZENG Qingyi;XU Liwei(Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering,Fuzhou 350118,China;School of Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;Fujian Kaijing Investment Group Co.,Ltd.,Fuzhou 350002,China;Jiahe Construction Group Co.,Ltd.,Xiamen 361000,China)
出处
《福建工程学院学报》
CAS
2023年第1期44-48,共5页
Journal of Fujian University of Technology
基金
福建工程学院横向科研项目(GY-H-22145)
福建工程学院2022年国家级大学生创新创业训练计划项目(202210388024,202210388022)。
关键词
镍渣
地聚物
碱激发剂
力学性能
nickel slag
geopolymer
alkali activator
mechanical properties
