Characterization and testing of metakaolin based geopolymer mortar containing corn cob ash along with carbon nano tubes
Loading...
Date
2020
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Punjab Agricultural University, Ludhiana
Abstract
Geopolymer is a new concept in the construction technology which is synthesized by mixing
the alumino-silicate sources with alkaline activating solution. It is an eco-friendly technique
which utilized various materials as an alternative to Ordinary Portland Cement. Metakaolin
(an alumino- silicate material) used as a source material, as it is suitable for
geopolymerization. In this study, effect of corn cob ash and multi walled carbon nano tubes
on metakaolin based geopolymer has been investigated. Seventy five mixes of geopolymer
mortar were prepared with three different molar concentrations of alkaline activator (8M,
10M and 12M) and different proportions of corn cob ash (0% to10% @2.5% increment) as
well as with the addition of multi walled carbon nano tubes at proportions of 0%, 0.25%,
0.50%, 0.75% and 1%. The compressive strength of geopolymer mortar was tested after 3,
7and 28 days of curing. Scanning electron microscope test was performed on powdered
sample of mixes M1, M13 & M23. The powdered samples were collected from remnants of
geopolymer after 28 days of compressive strength testing. Test results depicts that the
compressive strength of geopolymer mortar increases at all ages of curing when the molar
concentration of alkaline activator is enhanced from 8M to 12M but the proportion of corn
cob ash and multi walled carbon nano tubes increases the strength up to a certain limit.
Beyond that, there was reduction in the compressive strength of geopolymer mortar. The
geopolymer mortar prepared using 12M concentration of alkaline activator and 5%
proportion of corn cob ash including 0.50% of multi walled carbon nano tubes is
recommended for the maximum compressive strength.
Description
Keywords
Citation
Pawandeep Kaur (2020). Characterization and testing of metakaolin based geopolymer mortar containing corn cob ash along with carbon nano tubes (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.