Influences of Fly Ash on the Compressive Strength and Hydration Products of Magnesium Oxysulfate Cement

Author

Zhen-Guo Li ; Sheng-Peng Chen ; Jin-Ze Li ; Jin Li ; Ya-Dong Sun

Author_Institution

Coll. of Civil Eng. & Archit., Harbin Univ. of Sci. & Technol., Harbin, China

fYear

2014

fDate

20-23 Dec. 2014

Firstpage

139

Lastpage

141

Abstract

Magnesium oxysulfate cement (MOS) pastes mixed with different amounts of fly ash were tested on the compressive strength. The examinations of strength development, phase compositions and microstructure of MOS cement are discussed in detail. Results showed that the compressive strength of MOS cement specimens decreased with increasing fly ash content from 0% to 50% at the curing age 1 day. Moreover, the effects of fly ash on the compressive strength of MOS cement have relation to the molar ratio of H₂O/MgSO₄. Very fine particles of fly ash trap more capillary water and yields micro porosities and filling voids in MOS cement which would result increased compressive strength at the higher content.

Keywords

cements (building materials); compressive strength; curing; fly ash; hydrogen compounds; magnesium compounds; porosity; H₂O; MOS cement paste; MgSO₄; capillary water; cement microstructure; compressive strength; curing age; fly ash; hydration products; magnesium oxysulfate cement; microporosity; molar ratio; phase composition; strength development; Curing; Educational institutions; Fly ash; Magnesium; Microstructure; Water; X-ray scattering; fly ash; hydration products; magnesium oxysulfate cement; strength development;

fLanguage

English

Publisher

ieee

Conference_Titel

Future Generation Communication and Networking (FGCN), 2014 8th International Conference on

Conference_Location

Haikou

Print_ISBN

978-1-4799-7779-6

Type

conf

DOI

10.1109/FGCN.2014.41

Filename

7024363