Abstract
Geopolymers prepared from a class C fly ash (CFA) and a mixed alkali activator of sodium hydroxide and sodium silicate solution were investigated. A high compressive strength was obtained when the modulus of the activator viz., molar ratio of SiO{sub 2}/Na{sub 2}O was 1.5, and the proper content of this activator as evaluated by the mass proportion of Na{sub 2}O to CFA was 10%. The compressive strength of these samples was 63.4 MPa when they were cured at 75{sup o}C for 8 h followed by curing at 23{sup o}C for 28 d. In FTIR spectroscopy, the main peaks at 1036 and 1400 cm{sup -1} have been attributed to asymmetric stretching of Al-O/Si-O bonds, while those at 747 cm{sup -1} are due to the Si-O-Si/Si-O-Al bending band. The main geopolymeric gel and calcium silicate hydrate (C-S-H) gel co-exist and bond some remaining unreacted CFA spheres as observed in XRD and SEM-EXDA. The presence of gismondine (zeolite) was also observed in the XRD pattern.
Guo, Xiaolu;
Shi, Huisheng;
Dick, Warren A
[1]
- Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Shanghai (China)
Citation Formats
Guo, Xiaolu, Shi, Huisheng, and Dick, Warren A.
Compressive strength and microstructural characteristics of class C fly ash geopolymer.
United Kingdom: N. p.,
2010.
Web.
Guo, Xiaolu, Shi, Huisheng, & Dick, Warren A.
Compressive strength and microstructural characteristics of class C fly ash geopolymer.
United Kingdom.
Guo, Xiaolu, Shi, Huisheng, and Dick, Warren A.
2010.
"Compressive strength and microstructural characteristics of class C fly ash geopolymer."
United Kingdom.
@misc{etde_21369753,
title = {Compressive strength and microstructural characteristics of class C fly ash geopolymer}
author = {Guo, Xiaolu, Shi, Huisheng, and Dick, Warren A}
abstractNote = {Geopolymers prepared from a class C fly ash (CFA) and a mixed alkali activator of sodium hydroxide and sodium silicate solution were investigated. A high compressive strength was obtained when the modulus of the activator viz., molar ratio of SiO{sub 2}/Na{sub 2}O was 1.5, and the proper content of this activator as evaluated by the mass proportion of Na{sub 2}O to CFA was 10%. The compressive strength of these samples was 63.4 MPa when they were cured at 75{sup o}C for 8 h followed by curing at 23{sup o}C for 28 d. In FTIR spectroscopy, the main peaks at 1036 and 1400 cm{sup -1} have been attributed to asymmetric stretching of Al-O/Si-O bonds, while those at 747 cm{sup -1} are due to the Si-O-Si/Si-O-Al bending band. The main geopolymeric gel and calcium silicate hydrate (C-S-H) gel co-exist and bond some remaining unreacted CFA spheres as observed in XRD and SEM-EXDA. The presence of gismondine (zeolite) was also observed in the XRD pattern.}
journal = []
issue = {2}
volume = {32}
place = {United Kingdom}
year = {2010}
month = {Feb}
}
title = {Compressive strength and microstructural characteristics of class C fly ash geopolymer}
author = {Guo, Xiaolu, Shi, Huisheng, and Dick, Warren A}
abstractNote = {Geopolymers prepared from a class C fly ash (CFA) and a mixed alkali activator of sodium hydroxide and sodium silicate solution were investigated. A high compressive strength was obtained when the modulus of the activator viz., molar ratio of SiO{sub 2}/Na{sub 2}O was 1.5, and the proper content of this activator as evaluated by the mass proportion of Na{sub 2}O to CFA was 10%. The compressive strength of these samples was 63.4 MPa when they were cured at 75{sup o}C for 8 h followed by curing at 23{sup o}C for 28 d. In FTIR spectroscopy, the main peaks at 1036 and 1400 cm{sup -1} have been attributed to asymmetric stretching of Al-O/Si-O bonds, while those at 747 cm{sup -1} are due to the Si-O-Si/Si-O-Al bending band. The main geopolymeric gel and calcium silicate hydrate (C-S-H) gel co-exist and bond some remaining unreacted CFA spheres as observed in XRD and SEM-EXDA. The presence of gismondine (zeolite) was also observed in the XRD pattern.}
journal = []
issue = {2}
volume = {32}
place = {United Kingdom}
year = {2010}
month = {Feb}
}