PILAR JURNAL TEKNIK SIPIL Vol.14 No. 02, September 2019 Diterbitkan oleh: Jurusan Teknik Sipil, Politeknik Negeri Sriwijaya ISSN (Print) : 1907 - 6975 https://jurnal.polsri.ac.id/index.php/pilar/index Vol. 14 No. 02, September 2019 | 22 PENGARUH PEMAKAIAN KAWAT BENDRAT GALVANIS SEBAGAI BAHAN TAMBAH TERHADAP KUAT TEKAN BETON Hamdi 1* , Dafrimon 1 , Sugeng Harijadi 1 1 Jurusan Teknik Sipil, Politeknk Negeri Sriwijaya * hamdimuchtar @yahoo.com Naskah diterima: 31 Juli 2019. Disetujui: 02 September 2019. Diterbitkan : 30 September 2019 ABSTRACT The strength of concrete structures identified the quality of concrete meterials used. The higher the strength of structures needed, the more quality of concrete materials must be used to build those structures. Adding hooked- type steel fiber (HSF) into the concerete mixture was expected to improve compressive strength of the structure. The research was done in laboratorium by making of cubical concrete samples (15 x 15 x 15 cm), which were formed by adding of 0%, 1%, 2%, 3%, 4% and 5% HSF (of Portland Cement portion in the mix) into ordinary concrete mixtures (K-300 in 28 days). All of the samples were taken under the compressive machine after 14 days of curing. The experiments resulted that the compressive strength of concrete mixtures subsequently were 219 kg/cm2, 230 kg/cm2, 212 kg/cm2, 208 kg/cm2, 187 kg/cm2 and 181 kg/cm2. It was concluded that concrete mixture which was added with 1% of HSF found to have highest value of compressive strength among others and improving by 5,02% more in its quality. Key words: Concrete, Hooked Steel Fiber, Compressive Strength. ABSTRAK Kekuatan struktur beton mengidentifikasikan kualitas beton yang digunakan. Semakin tinggi kekuatan struktur beton yang dikehendaki, maka semakin tinggi pula mutu beton yang harus digunakan. Penambahan serat baja berupa kawat bendrat berkait (hooked), diharapkan dapat memperbaiki kualitas beton dari sisi kekuatan lenturnya. Penelitian dilakukan melalui uji sampel yang dilakukan di laboratorium, yaitu dengan menggunakan beton polos mutu K-300 (umur 28 hari), dengan penambahan serat kawat bendrat kadar 0%, 1%, 2%, 3%, 4% dan 5%. Hasil pengujian pada sampel usia 14 hari diperoleh bahwa, pada penambahan 1%, 2%, 3%, 4% dan 5% kawat bendrat terhadap semen, berturut-turut dihasilkan kekuatan lentur sebesar 219 kg/cm2, 230 kg/cm2, 212 kg/cm2, 208 kg/cm2, 187 kg/cm2 dan 181 kg/cm2. Dapat disimpulkan bahwa penambahan kawat bendrat 1% kedalam campuran beton memiliki nilai kuat tekan tertinggi diantara komposisi lainnya. Kata Kunci: Beton, Kawat Bendrat, Kuat Tekan. Vol. 14 No. 02, September 2019 | 21 PILAR JURNAL TEKNIK SIPIL POLITEKNIK NEGERI SRIWIJAYA