Compressive strength of marine material mixed concrete

Many cement factories have been incorporated fly ash with clinker cement to
produce blended cement. PCC is a type of blended cement incorporated fly ash that produced
in Indonesia cement factories. To promote the sustainable development in the remote islands
this present paper attempted to study the suitability of sea water, marine sand that available
abundantly surround the remote island with Portland Composite Cement (PCC) and crushed
river stone to produce concrete. Slump test was conducted to evaluate the workability of fresh
concrete and also compressive strength with stress-strain relationship was carried out to
evaluate the hardened concrete that cured with two curing condition (e.g. sea water curing, and
tap water-wet burlap curing). Test result indicated that fresh concrete had proper workability
and all hardened specimens appeared a good compaction result. Compressive strength of
specimens cured which sea water was higher than the specimens which cured by tap water-wet
burlap where stress-strain behavior of specimens made with sea water, marine sand, and PCC
had similar behavior with specimens which made with PCC and tap water.