Efek Perkuatan Glass Fiber Reinforce Polymer Sheet Pada Balok Beton Bertulang Dengan Tulangan Korosi

Mufti Amir Sultan; Ridwan AR; Abdul Gaus

doi:10.29103/tj.v12i1.694

Efek Perkuatan Glass Fiber Reinforce Polymer Sheet Pada Balok Beton Bertulang Dengan Tulangan Korosi

Mufti Amir Sultan, Ridwan AR, Abdul Gaus

Abstract

Abstrak

Artikel ini menyajikan tentang balok beton bertulang yang tulangannya telah korosi kemudian diberi perkuatan ekternal berupa serat glass tipe lembaran atau Glass Fiber reinforced Polymer-Sheet (GFRP-S). Pada studi ini variabel berdasarkan variasi tingkat korosi pada tulangan. Lima macam benda uji yang digunakan berbentuk balok dengan dimensi 15x20 cm panjang 160 cm. Tulangan utama yang digunakan besi f12 dan tulangan sengkang f8-100. Mutu beton digunakan 25 MPa. Balok beton bertulangan normal tanpa perkuatan sebagai balok kontrol (BN), balok beton bertulangan normal dengan perkuatan GFRP-S (BP), balok beton bertulangan korosi dengan perkuatan GFRP-S (BPK), variasi waktu pengkorosian tulangan selama 2 minggu (BPK₂), 4 minggu (BPK₄) dan 6 minggu (BPK₆) dengan metode perendaman pada larutan asam sulfat 2,0%. Balok diperkuat GFRP-S pada daerah Tarik di bagian bawah balok. Pengujian lentur dengan twopoint load. Hasil penelitian menunjukkan bahwa balok beton bertulang yang diperkuat dengan GFRP-S mempunyai kapasitas lebih besar dibandingkan dengan balok normal sebesar 12,07%. Balok beton bertulang dengan tulangan tingkat korosi lebih besar (pengkorosian 6 minggu) cenderung menurunkan kapasitas balok namun kapasitasnya masih lebih besar dari balok normal sebesar 1,38%.

Kata kunci: balok beton, tulangan korosi, asam sulfat, GFRP-S

Abstract

This article presents about reinforced concrete beams whose reinforcement has been corroded and then externally reinforced in the form of sheet type glass fiber or Glass Fiber Reinfroced Polymer-Sheet (GFRP-S). In this study, the variables are based on variations in the level of corrosion on the reinforcement. Five kinds of test objects used in the form of blocks with dimensions of 15x20 cm and length of 160 cm. The main reinforcement used is f12 and f8-100 stirrup reinforcement. The quality of the concrete used is 25 MPa. Normal reinforced concrete beams without reinforcement as control beams (BN), normal reinforced concrete beams with GFRP-S reinforcement (BP), corrosion reinforced concrete beams with GFRP-S reinforcement (BPK), variations in reinforcement corrosion time for 2 weeks (BPK₂), 4 weeks (BPK₄)and 6 weeks (BPK₆) by immersion method in 2.0% sulfuric acid solution. The beam is reinforced with GFRP-S in the Tensile region at the bottom of the beam. Flexural test with two point load. The results showed that reinforced concrete beams reinforced with GFRP-S had a larger capacity than normal beams by 12.70%. Reinforced concrete beams with reinforcement with a higher corrosion rate (6 weeks corrosion) tend to reduce the capacity of the beam but its capacity is still larger than normal beams by 1.38%.

Keywords: concrete beam, corrosion reinforcement, sulfuric acid, GFRP-S

Keywords

concrete beam, corrosion reinforcement, sulfuric acid, GFRP-S

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DOI: http://dx.doi.org/10.29103/tj.v12i1.694