Title : ULTRA HIGH PERFORMANCE CONCRETE (UHPC) AND EXPANDED POLYSTYRENE (EPS) AS HYBRID STRUCTURE FOR BOAT BODY
Authors : Harianto Hardjasaputra, Wiryanto Dewobroto, Jack Widjajakusuma, Baskoro Junianto
Publication : 8 - 10, October 2015
Volume : 1
Pages :
Price : 250
Abstract : The Author has conducted recently the research in developing Ultra High Performance Concrete (UHPC), using local materials in Indonesia, which consist of Ordinary Portland Cement SNI Type 1, Quartz sand, Marble powder, Micro silica, Superplastisizer. The average compressive strength of UHPC, which can be achieved from our mix design, is between fc’ 130 MPa – 140 MPa. During the process of concrete mixing the author detected, that compared to UHPC without fiber, the workability of fresh polyprophylene fiber UHPC changed significantly from flow to be like clay, easily to be formed. It has been reported also, that UHPC has much better durability compared to normal concrete. For that reason UHPC is suitable to be used also for floating structure in polluted water. Using Expanded Polystyrene (EPS), in the market well-known as Styropor Foam, in the building and construction materials are relatively new. DIN 18164 part 1 and ASTM 6817M-15 are some examples of the German and American Standards used for rigid EPS foam. The advantage of EPS foam is because of its lightness and durability. The bulk density of EPS foam is 15 kg/m3 – 30 kg/m3, very light compared to concrete. The objective of this paper is to demonstrate how the use of these two materials UHPC and EPS foam can be combined to form a hybrid structure of a boat body structure. The UHPC will give the strength and protection of the boat, meanwhile the EPS foam is awakening its buoyancy. The boat will be applied as service boat in revitalizing and maintaining the rivers, channels and ponds, which contaminated with high polluted water.