Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 151, Issue -, Pages 512-519Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.06.078
Keywords
Fly ash; Amorphous Si/Al ratio; Alkaline activator; Geopolymer paste and mortar; Compressive strength; Polymerization reactivity
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2015R1A5A1037548]
Ask authors/readers for more resources
The strength development properties of geopolymer paste and mortar with 20-40 wt% of sand is analyzed with respect to changes in the Si/Al ratio calculated from a combination of the amorphous Si and Al contents in fly ash and an alkaline activator. Experimental results confirm that the compressive strength of the geopolymer paste is greatly affected by the Si/Al ratio. The geopolymer paste also shows high polymerization reactivity at an early age. Although a direct correlation between the polymerization reactivity of the geopolymer paste and the strength development could not be confirmed from the X-ray diffraction results, the difference in the polymerization reactivity resulting from the strength development is confirmed through scanning electron microscopy. The compressive strengths of the geopolymer mortar with 20-40 wt% of sand after aging for 28 days are 23.7-26.4 MPa, which confirms the possibility of using geopolymer mortar as a construction material. (C) 2017 Elsevier Ltd. All rights reserved.
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