Korespondensi Artikel : A Preliminary Study of Alkali-Activated Pozzolan Materials Produced with Sodium Hydroxide Activator

Mortar that is more environmentally friendly (green mortar) is defined as concrete that at least uses waste material
as one of its components or that does not cause environmental damage during the production process. Geopolymer is an
environmentally friendly technology because it utilizes pozzolanic materials such as fly ash, rice straw ash, and laterite soil as
waste materials. This work describes the experimental inquiry carried out to produce the geopolymer mortar based on alkali�activated fly ash, rice straw ash, and laterite soil by sodium hydroxide (NaOH). The influence of the curing technique on
compressive strength and optimum mix proportion of geopolymer mortar were explored. In experiments, an alkaline activator
(NaOH) was used with a binder composition at weight ratios of 4.17:1.67:4.17, rice straw ash, fly ash, and laterite soil were
combined. To examine the workability and mechanical properties of the final geopolymer, experiments on mortar flow and
compressive strength were performed. Fresh geopolymers subjected to flow testing reveal that all components are tightly linked,
and segregation does not occur. The hardened test specimen was treated in two different ways—in the open air and by being
submerged in water solutions—for up to 7 and 28 days, respectively, to ascertain its resistance. The 12 M alkali-activated
geopolymer mortar may reach compressive strengths of 1.72 N/mm2 and 3.22 N/mm2
for air curing and 1.63 N/mm2 and 1.68
N/mm2
for water curing, respectively, after 7 and 28 days of casting when cured for 24 hours. The compressive strength was
shown to rise with an increase in curing method, curing time, and alkali activator concentration.