The Result of this research is conventional beam (K1,K2) or precast beam (P1,P2), for precast beam (P1,P2) grouted with SIKA Grout 215 product and mechanic at the joint. Compressive Strength of concrete at 28 day is 358,26 Kg/cm2For flexure test until failure have resulted for convensional beam K1 deflection at maximum load 9,61 ton is 2,114 cm, for convensional beam K1 deflection at maximum load 9,82 ton is 1,479 cm, for convensional beam K1 deflection at maximum load 12,79 ton is 2,103 cm, for convensional beam K1 deflection at maximum load 12,02 ton is 1,745 cmKeywords: Precast, Grouting, non shrinkageABSTRAKPada penelitian ini telah dihasilkan benda uji baik benda uji konvensional (K1, K2) maupun benda uji precast (P1,P2) dimana untuk benda uji P1 dan P2 dilakukan penggroutingan dengan bahan grouting nonshrinkage (tidak susut) produk Sika Grout 215 pada daerah sambungannya selain dengan mechanic joint. Mutu beton rata – rata yang dicapai adalah 358,26 Kg/cm2Hasil yang telah dicapai pada penelitian ini adalah untuk balok konvensional K1 menghasilkan lendutan pada beban maksimum 2,114 cm , untuk balok konvensional K2 menghasilkan lendutan pada beban maksimum 1,479 cm, untuk balok precast P1menghasilkan lendutan pada beban maksimum 2,103 cm, untuk balok precast P2 menghasilkan lendutan pada beban maksimum 1,745 cmBeban maksimum yang dicapai balok konvensional K1 adalah 9,61 ton, untuk balok konvensional K2, beban maksimum 9,82 ton, untuk balok precast P1, beban maksimum 12,79 ton, untuk balok precast P2 beban maksimum 12,02 tonKata Kunci : Precast, Grouting, non shrinkage
Research precast beam type L shape has produced strength of flexure where it was jointed at middle of span with L shape. Problem was about strength and deflection with joint of Type L shape. Aim of this research was determined strength of flexure such deflection and maximal load would be apllicated. Precast beam type L shape consist of two beam P1 and P2 were tested at two point load was applicated. This research have produced of data of precast beam P1 and P2. Precast beam P1 has deflection 28,44 mm at maximum load 11,21 Ton. Precast beam P2 has deflection 26,71 at maximum load 11,76 Ton. Except that data, has produced also chart of load versus deflection where precast beam type L shape has behavior less for ductility approximately du/dy 1,17, where deformation inelasticity was not seem. That occur because overlapping at joint of precast concrete at middle of span.
ABSTRACT This research about connection of precast simple beam with double lapsplices middle wet joint system have finished with comparing of flexure strength between precast beam with connection at meddle span (middle wet joint) and conventional beam. Performance of flexure strength of precast beam with connection at meddle span (middle wet joint) is better than conventioanal beam, can be proved to curve of deflection – load between conventional beam (1 and 2) with precast beam with connection at meddle span (middle wet joint 1 and 2). Base on that curve, can be known that precast beam with connection at meddle span (middle wet joint 1) have deflection10 mm at 151,8 kn and precast beam with connection at meddle span (middle wet joint 2) have deflection16 mm at 169,2 kn and conventional beam 1 have deflection 47 mm at 145,5 kn and conventional beam 2 have deflection 40 mm at 144,7 kn Keynote : prestressed,precast,boned nonprestressed,concrete
Abstrak Pada penelitian sambungan (boned nonprestressed) pada balok precast ini telah dihasilkan suatu perbandingan kekuatan lentur antara balok precast yang disambung di tengah bentang (middle wet joint) dengan balok konvensional. Dari hasil yang ada terlihat bahwa performa balok precast yang disambung di tengah bentang dengan sistim middle wet joint dibandingkan dengan balok konvensional adalah tidak lebih baik, hal itu dibuktikan pada kurva hubungan lendutan-beban rata-rata antara benda uji 1,2,3 dengqn benda uji 4,5,6. Dari kurva yang ada diketahui bahwa rata-rata benda uji balok precast 1,2,3 menghasilkan beban maksimal 22,7 KN pada lendutan 6 mm sedangkan pada kurva rata-rata benda uji balok konvensional 4,5,6 menghasilkan beban maksimal 32,7 KN. Kata Kunci : Prestressed,precast,boned nonprestressed,concrete
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