Preparation and Characterization of Nickel Slag/Metakaolin Based Geopolymer
ZHANG Changsen1, ZHU Baogui1, 2, LI Yang1, 3, FENG Zhenzhe1, 2, WANG Yu1, HU Zhichao1, 2
1 School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051; 2 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212000; 3 School of Materials Science and Engineering, Changzhou University, Changzhou 213164
Abstract: A series of nickel slag/metakaolin based geopolymer were prepared under the same consistency using industrial solid waste nickel slag and metakaolin as raw materials, water glass as activator. The effect of nickel slag type and content on the mechanical properties and volume change of the geopolymer were studied. The alkali dissolution of geopolymer was characterized by pH analyzer, the mineral composition and microstructure of the geopolymer were analyzed by XRD and SEM-EDS. With the increase of the amount of water-hardening nickel slag, the compressive strength of geopolymer first increased and then decreased. The compressive strength of the geopolymer with 50% nickel slag and 0.45 liquid/solid ratio reached the maximum value (58.8 MPa(28 d)). The incorporation of air quench reduced the compressive strength. In addition, water-hardening nickel slag/metakaolin geopolymer had a expansion behavior, air quench nickel/metakaolin geopolymer had a shrinkage behavior.
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2017, Vol. 31 
