Abstract:
More than seventy percent of the volume of concrete is occupied by aggregates.
AggreSates w^h undesirable qualities will have an adverse effect on durability and structural
performance of concrete. Though gneiss is normally used as coarse aggregates in production of
concrete, due to their unavailability in the region, limestone is used as coarse aggregate for production
of concrete in Northern Sri Lanka, without appropriate investigations.
In this study, impact of limestone aggregates on concrete properties such as slump, initial setting time
compressive strength, flexural strength, etc. were investigated under laboratory conditions and the
results were compared with the concrete made with normal aggregates. Two types of limestone
aggregates were used for this purpose, red limestone which was collected from YValikamam west,
Jaffna and white limestone, which was collected from Chavakachcheri area.
Abstract:
It was found that water absorption of limestone aggregates is 50% higher than that of the normal
aggregates. Also, workability and compaction ability in limestone concrete are significantly lower for
a given w/c ratio compared to normal aggregate concrete. However, compressive strength and
flexural strength are found to be the same as the normal aggregates. Also, results indicate that red
limestone aggregates have better performance than the white limestone aggregates.
Citation:
Hemadasa, M.B.C., & Dilrukshi, K.G.S. (2014). Investigation of the properties of limestone concrete. In M.T.P. Hettiarachchi (Ed.), Proceedings of the Civil Engineering Research Symposium 2014 (pp. 53-56). Department of Civil Engineering, University of Moratuwa.
