- Presently researches all over the
world is concentrating on alternative materials as
partial cement replacement in concrete production.
The use of pozzolanic material in concrete is
becoming increasingly important because of the
need for more sustainable cementing products.
Volcanic ash is a form of natural pozzolan and has
a chemical composition comparable to other
supplementary cementitious materials. In this
paper, volcanic ash was used to partially replace
cement in the ratio of 0%, 5%, 10%, 15% and 20%
by volume in concrete and cured in H2SO4 and
MgSO4 environment. 28-day target strength was
adopted and concrete tested at 7, 14, 28 and 56
days’ hydration period. Specific gravity, bulk
density and setting time test on volcanic ash were
carried out. Fresh concrete tests such as slump and
compacting factor test were carried out along-side
hardened concrete tests like compressive strength
and split tensile strength. The result shows that the
maximum compressive strength at 28 days was at
0% control concrete, while at 56 days the
maximum strength was observed at 10%
replacement of cement with volcanic ash and it is
considered as optimum percentage replacement.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.