Abstract
In order to promote sustainable development in the remote islands this present research attempted to study the suitability of seawater, that available abundantly surrounding the remote islands with Portland composite cement (PCC) and crushed river stones to produce concrete. This research aims to utilize seawater, and Portland composite cement (PCC) to produce high-performance concrete in order to eliminate the main problems of clean water shortage in the low land areas and the remote islands. Infrastructure development can be sustained through the effective use of natural available local materials on the remote islands. The method used in this research is an experimental method in the laboratory. Two variations of concrete were made using freshwater and seawater, respectively as a mixing material with a water to cement ratio (w/c) of 0.55. The evaluation result on concrete compressive strength and bond strength of seawater concrete were discussed. Experimental results showed the compressive strength of the seawater concrete is lower by 6.26% as compared to the normal concrete at water-cement ratio (w/c) of 0.55. In addition, the bonding strength of steel bar embedded in seawater concrete is lower by 4.34% as compared to the bonding strength of steel bar embedded in normal concrete at water-cement ratio (w/c) of 0.55. Doi: 10.28991/cej-2020-SP(EMCE)-06 Full Text: PDF
Highlights
Indonesia is an archipelagic country in the sense that at every location, there are buildings located on the coastal areas and remote islands
One important aspect of reinforced concrete is the compressive strength of concrete, the bonding strength of steel reinforcement to concrete, and the water cement ratio in concrete structures exposed in coastal areas
At water-cement ratio (w/c) of 0.55, the compressive strength of normal concrete is 23.00 N/mm2, while seawater concrete has a compressive strength of 21.56 N/mm2. These results indicate that the compressive strength of seawater concrete is 6.26% lower than that of normal concrete
Summary
Indonesia is an archipelagic country in the sense that at every location, there are buildings located on the coastal areas and remote islands. The process of constructing buildings on the coastal areas and remote islands, have the high tendency to contact with seawater which is inevitable, coupled with the limited supply of freshwater to the construction site, making use of seawater for concrete work is an interesting innovation. One important aspect of reinforced concrete is the compressive strength of concrete, the bonding strength of steel reinforcement to concrete, and the water cement ratio in concrete structures exposed in coastal areas. Portland composite cement has been widely used in concrete construction in Indonesia. Several studies revealed that seawater and Portland composite cement can be used to produce high performance concrete [1,2,3,4]
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