Journal
CEMENT AND CONCRETE RESEARCH
Volume 138, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2020.106253
Keywords
Alkali activated cement (D); Ground blast-furnace slag (D); Fly ash (D); Rheology (A); Pore solution (B); Structural build-up
Funding
- FWO-EOS [30439691]
Ask authors/readers for more resources
The effects of ground granulated blast furnace slag/fly ash (GGBFS/FA) ratio, mass ratio of SiO2 to Na2O (M s ) of activator solution and sodium silicate dosage on structural build-up, flow properties and setting characteristics of alkali-activated cement (AAC) mixtures were investigated. The solid-like behavior becomes more dominant with increasing GGBFS/FA ratio. M, value had significant effect on the structural build-up. Significantly higher initial storage modulus with a low increasing rate was observed for the M, values lower than 0.8. However, for higher M, values, a sudden increase in storage modulus was observed after negligible initial structuration. An increase in sodium silicate dosage caused a considerable delay in the abrupt increase in the structural formation. It was observed that flow curves of AAC fit the Herschel-Bulkley model with shear-thickening behavior. ICP-OES tests revealed the lower release of aluminum and calcium into the pore solution of GGBFS/FA mixtures with low M, values.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available