PENGARUH PERBEDAAN KERAPATAN ROUGH COAT PADA 3LPE COATING TERHADAP KEKUATAN GESER CONCRETE WEIGHT COATING

Abstract

The coating process involves applying a protective layer to materials to prevent corrosion. One common pipe coating method uses the 3-layer Polyethylene (3LPE) and Concrete Weight Coating (CWC) techniques. However, shifts between the CWC layer and the 3LPE coating are often observed. This study was conducted to determine the effect of different densities and the application of a Rough Coat. Tests performed included density, compressive strength, and shear strength measurements. The density variations observed were 0 points/mm², 121 points/mm², 256 points/mm², and 441 points/mm². The compressive strength test yielded 34.71 MPa, 30.41 MPa, and 36.78 MPa, all exceeding the acceptance criteria of 24.1 MPa. The shear strength tests indicated that the higher the Rough Coat density, the greater the shear load capacity. The shear strength values for the Rough Coat density variations were 0.44 MPa, 0.78 MPa, 0.98 MPa, and 1.27 MPa, respectively. The results show that density variation and the use of Rough Coat significantly increase frictional force, enabling the coating to withstand larger loads and producing higher shear strength values. The Rough Coat with the highest density achieved the optimal shear strength.