Title :
Strength and microstructure of class C fly ash based geopolymer activated with sodium silicate powder
Author :
Li, XueYing ; Zheng, EnZu ; Zhao, YaDing ; Ma, ChunLong
Author_Institution :
Sch. of Civil Eng., Harbin Inst. of Technol., Harbin, China
Abstract :
The compressive strength and microstructural characteristics of class C fly ash based geopolymer activated with sodium silicate powder were investigated. The geopolymer samples with the highest strength 44.6MPa were obtained when the mass ratio of water to milled fly ash (W/F) was 0.28 and then followed by curing at 70°C for 30h. In the XRD patterns, many crystalline zeolithic phases were found. The results of SEM-EXDA indicated that for geopolymer with lower W/F, the structure was more compact and excess calcium played an important role in the form of geopolymeric gel.
Keywords :
X-ray diffraction; compressive strength; fly ash; geopolymers; polymer gels; SEM-EXDA; XRD patterns; class C fly ash; compressive strength; crystalline zeolithic phases; geopolymer activation; microstructural characteristics; pressure 44.6 MPa; sodium silicate powder; temperature 70 degC; Calcium; Curing; Fly ash; Powders; Scanning electron microscopy; Silicon; X-ray scattering; class C fly ash; compressive strength; geopolymer; microstructural characteristics; sodium silicate powder;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5769265
