PENGARUH PENAMBAHAN SERAT PVC TERHADAP DAKTILITAS BETON DENGAN PENGUJIAN KUAT TEKAN, KUAT LENTUR, TARIK BELAH, DAYA SERAP DAN BERAT JENIS

MAHENDRA MAULANA, DIAN SESTINING AYU, ST., MT.

2018 | Tugas Akhir | D3 TEKNIK SIPIL SV

Struktur bangunan umumnya hanya memperhatikan kekakuan dan kekuatan pada bangunan. Terdapat satu faktor yang harus diperhatikan yaitu memiliki daktilitas yang tinggi. Daktilitas beton artinya kemampuan beton mampu berdeformasi yang cukup besar, seteleh mengalami retak awal pada balok beton ditambahkannya serat cacahan pipa PVC (Polyvinyl Chloride) karena bersifat elastis dan fleksibel, disamping itu tujuan penelitian ini yaitu memanfaatkan limbah matrial pipa PVC bekas. Benda uji berupa balok beton ukuran 15 x 20 x 120 cm dengan tulangan pokok 4d8 dan sengkang d6-100, untuk variasi beton normal (0%); 1,25%; 2,5%; dan 3,75% dari berat semen, dengan beberapa pungujian yaitu kuat lentur daktilitas balok beton, tarik belah silinder beton, kuat tekan silinder beton, daya serap beton, dan berat jenis beton, pada umur beton 28 hari. Pengujian daktilitas balok beton dengan serat pipa PVC lebih kecil dibanding beton normal, dengan variasi serat PVC 1,25% dan 2,5% menutun hingga 2% dan 38%. Pengujian kuat tarik belah dari silinder beton serat PVC 1,25%; 2,5%; dan 3,75% lebih kecil dibanding beton normal, menurun hingga 29%; 28%; dan 12%. Pengujian kuat tekan dari silinder beton serat PVC 1,25%; 2,5%; dan 3,75% lebih kecil dibanding beton normal, menurun hingga 24%; 8%; dan 12%. Pengujian daya serap beton serat PVC 3,75% lebih besar dibanding beton normal hingga 25%. Pengujian berat jenis silinder dan balok beton serat PVC 1,25%; 2,5%; dan 3,75% rata-rata sama dengan beton normal.

Generally, the considerations given in construction structure are only to the stiffness and the strength of the building. One factor that has to be considered is having a high ductility. Concrete ductility means that the strength of the concrete has the considerable capability to do deformation, after the initial crack on the concrete beam. The attempt to add PVC pipe (Polyvinyl Chloride) fiber is because it is brittle but elastic and flexible. In addition, the aim of this research is to utilize the waste of PVC pipe. The test specimen is a 15 x 20 x 120 cm concrete beam with 4d8 of longitudinal reinforcement and d6-100 of bow, for normal concrete type (0%); 1.25%; 2.5%; and 3,75 % from the cement weight. On the 28th days of the specimen, there are several tests performed namely, flexural strength test to the ductility of the concrete beam, concrete cylinder tensile strength test, concrete cylinder compressive strength test, concrete water absorption, and concrete specific weight. The concrete beam ductility test with PVC pipe fiber is smaller than the normal one. By the PVC fiber variation 1.25% and 2.5%, it is decreasing by 2% and 38%. The tensile strength test of the concrete beam with PVC fiber is 1.25%; 2.5%; and 3.75% and is smaller than the normal one, decreasing by 29%; 28%; and 12%. The PVC fiber concrete beam compressive strength test is 1.25%; 2.5%; and 3.75% that is smaller than the normal concrete and is decreasing by 24%; 8%; and 12%. The concrete beam with PVC fiber water absorption test is 3.75% that is greater than the normal concrete up to 25%. The specific weight of the PVC fiber concrete beam and cylinder is 1.25%; 2.5%; and 3.75% that is approximately the same as the normal concrete.

Kata Kunci : Kata kunci : daktilitas beton, berton bertulang, perkuatan serat pipa PVC