Abdullah, Muhammad Sofian and Ahmad, Fauziah
(2017)
Effect of Alkaline Activator to Fly Ash Ratio for
Geopolymer Stabilized Soil.
MATEC Web of Conferences, 97 (01012).
pp. 1-8.
ISSN 2261-236X
Abstract
Geopolymer technology have been developed and explored
especially in the construction material field. However, lack of research
related to geopolymer stabilized soil. In this research, the utilization of
geopolymer has been investigated to stabilize the soil including the factors
that affecting the geopolymerization process. Unconfined compressive test
(UCT) used as indicator to the strength development and hence evaluating
the performance of geopolymer stabilized soil. This paper focusing on the
effect of fly ash/alkaline activator ratio, Na2SiO3/NaOH ratio and curing
time on geopolymer stabilized soil. A various mix design at different fly
ash/alkaline activator ratio, Na2SiO3/NaOH ratio were prepared and cured
for 7 and 28 days. Molarity and the percentage of geopolymer to soil were
fixed at 10 molar and 8 percent respectively. Then, the UCT tests were
carried out on 38mm diameter x 76mm height specimens. The highest
strength obtained at the fly ash/alkaline activator ratio 2.5 and
Na2SiO3/NaOH ratio 2.0 at 28 days curing time.
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