PERBAIKAN DAN PERKUATAN LENTUR KOLOM DENGAN BETON RESIN POLIESTER (POLYESTER RESIN CONCRETE)

• Main Authors: , DAHLIA PATAH, , Ashar Saputra, ST., MT., Ph.D.
• 格式: Theses and Dissertations NonPeerReviewed
• 出版: [Yogyakarta] : Universitas Gadjah Mada 2013
• 主題: ETD
• 在線閱讀: https://repository.ugm.ac.id/122719/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=62823
• 機構: Universitas Gadjah Mada

Concrete column structures damages due to flexural moment needs to be repaired and strengthened to avoid of sudden failure by applying appropriate methods. The method applied in this study was retrofitting by applying polyester resin concrete. In order to know the effect of polyester resin concrete against axial load capacity, stiffness, ductility and the damage pattern of columns by eccentrically loaded, experimental laboratory was carried out. In this study, three column specimens be tested. The dimension of the specimen is 150 mm x 150 mm and the high of the column are 1200 mm with the effective high are 600 mm and 600 mm for corbel. The column specimen have a fixed eccentricity of 50 mm. First, initial column tested before yield point of reinforcing bar reached. Further, retrofitting applied to each initial column specimen using normal concrete and polyester resin concrete with the level of resin 15% and 20%, respectively. Retrofitting column tested again with the same loading of initial column until it reaches the collapse load. The result of experiment compare to analysis method by Nawy and Whitney which represent analysis of normal concrete column capacity. The result showed that the optimum levels of resin to be use 20% because easy to work compared to 15% resin. Further, compressive strength obtained from the resin level at 15% and 20% are 82.82 MPa and 76.65 MPa, respectively. Strength of KR-ii decreased about 33.523%. The strength of KR- 15ii and KR-20ii increased 5.08% and 24.827% respectively compared to initial column. Stiffness of specimen�s column KR-ii. KR-15ii and KR-20ii decreased about 76.22%, 24.50% and 37.65%, respectively from initial column. Furthermore, ductility of KR-ii, KR-15ii and KR-20ii decreased about 1.512, 1.250 and 2.50, respectively. The changes of ultimate capacity load of KR-ii, KR-15ii and KR-20ii by Nawy Method respectively -26.54%, 12.66% and 13.83%, whereas the method of Whitney respectively -17.68%, 26.25% and 27.56%.