A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Interfacial Transition Zone of Alkali-Activated Slag Concrete
In this study, both micro and macro tests were performed to investigate the effect of activator types on the characteristics of the interfacial transition zone (ITZ) in alkali-activated slag concrete (AASC) with presoaked ceramsite. Two types of chemical activators (Na2SO4 and Na2SO4 plus water glass) were used, each leading to unique cement products. Microhardness was measured within ITZ and analyzed together with microstructure observations by scanning electron microscopy (SEM). Macroscopic properties, including compressive strength and splitting tensile strength, were also measured. For the AASCs with natural coarse aggregate and ceramsite activated by Na2SO4, the microhardness and the Ca/Si ratio of the ITZ are lower than that of portland-cement concrete (PC). For the natural coarse aggregate-AASC activated by Na2SO4 plus water glass, the microhardness of the ITZ is higher than that of PC, and the Ca/Si ratio of the ITZ is lower than that of PC; replacing natural coarse aggregate with ceramsite, the microhardness of the ITZ improves further.
Interfacial Transition Zone of Alkali-Activated Slag Concrete
In this study, both micro and macro tests were performed to investigate the effect of activator types on the characteristics of the interfacial transition zone (ITZ) in alkali-activated slag concrete (AASC) with presoaked ceramsite. Two types of chemical activators (Na2SO4 and Na2SO4 plus water glass) were used, each leading to unique cement products. Microhardness was measured within ITZ and analyzed together with microstructure observations by scanning electron microscopy (SEM). Macroscopic properties, including compressive strength and splitting tensile strength, were also measured. For the AASCs with natural coarse aggregate and ceramsite activated by Na2SO4, the microhardness and the Ca/Si ratio of the ITZ are lower than that of portland-cement concrete (PC). For the natural coarse aggregate-AASC activated by Na2SO4 plus water glass, the microhardness of the ITZ is higher than that of PC, and the Ca/Si ratio of the ITZ is lower than that of PC; replacing natural coarse aggregate with ceramsite, the microhardness of the ITZ improves further.
Interfacial Transition Zone of Alkali-Activated Slag Concrete
Ji, Tao (author) / Gao, Qiaoling / Zheng, Wenyuan / Lin, Xujian / Wu, Hwai-Chung
ACI materials journal ; 114
2017
Article (Journal)
English
Interfacial Transition Zone of Alkali-Activated Slag Concrete
| Online Contents | 2017