ABSTRAK
Seiring dengan perkembangan ilmu pengetahuan dan teknologi konstruksi, muncul inovasi dan kreativitas produk yang berupa dinding pracetak sebagai pengganti dinding konvensional. Dewasa ini penelitian yang sering dilakukan adalah mengenai produk beton ringan berbentuk panel yang digunakan sebagai dinding partisi. Limbah plastik PET (Polyethylene Terephthalate) dapat menjadi alternatif bahan pengganti agregat kasar pada beton ringan yang ramah lingkungan. Tujuan penelitian ini adalah mengetahui nilai kuat lentur pada panel beton ringan beragregat kasar limbah plastik PET dengan penambahan silica fume dan serat baja yang diperkuat dengan kawat wiremesh.
Metode penelitian yang digunakan adalah metode experimental. Pengujian terhadap agregat halus, agregat kasar dan kawat wiremesh dilakukan sebagai uji pendahuluan untuk mengetahui kelayakan material. Perencanaan rancang campur beton menggunakan metode Dreux-Corrise. Kawat wiremesh yang digunakan berdiameter 1,55 mm dengan spasi tulangan 2,5 cm. Presentase silica fume yang dipakai sebesar 10% dari berat semen dan serat baja yang digunakan adalah kawat bendrat 3 cm. Benda uji berbentuk panel berukuran panjang 50 cm, lebar 30 cm dan memilik variasi ketebalan 3 cm dan 5 cm yang masing-masing berjumlah 3 buah.
Berdasarkan analisis, nilai kuat lentur rata-rata yang dihasilkan dari panel beton ringan dengan tebal 3 cm secara teoritis dengan metode luasan transformasi adalah 110.439 N.mm sedangkan menurut hasil pengujian laboratorium adalah 376.667 N.mm. Nilai kuat lentur rata-rata yang dihasilkan dari panel beton ringan dengan tebal 5 cm secara teoritis adalah 316.178 N.mm sedangkan menurut hasil pengujian laboratorium adalah 573.330 Nmm.
Kata kunci : beton ringan, Dreux-Corrise, kuat lentur, polyethylene terephthalate,
wiremesh
ABSTRACT
Along with the development of science and technology of construction have emerged the innovations and creativity of products which in the form of the precast walls as a replacement for conventional walls. Today, the researches were often done on lightweight concrete products of panels-shaped that they were used as partition wall. The plastic waste of PET (Polyethylene Terephthalate) can be an alternative replacement of coarse aggregate materials in the lightweight concrete is environmentally friendly. The study purposes were determined the value of flexural strength of lightweight concrete mix with coarse aggregate of plastic waste of PET with the addition of silica fume and steel fibers with the reinforcement addition of wiremesh.
The study method was used experimental method. The testing on the fine aggregate, coarse aggregate and wiremesh were conducted as a preliminary test to determine the feasibility of the material. The planning of concrete mix design was used Dreux-Corrise method. Wiremesh was used the diameter of 1.55 mm with reinforcement spacing of 2.5 cm. The silica fume percentage were used by 10% of the cement weight and steel fibers was used the bendrat wire 3 cm. Panel-shaped test specimens measuring 50 cm of long, 30 cm of wide and variations in thickness of 3 cm and 5 cm respectively amounted to 3 pieces.
Based on the analysis, the average of flexural strength of the lightweight concrete test specimen with a thickness of 3 cm theoretically is 110.439 N.mm and according to the results of laboratory testing is 376.667 N.mm. While the average of flexural strength of the lightweight concrete test specimen with a thickness of 5 cm theoretically is 316.178 N.mm and according to the results of laboratory testing is 573.330 N.mm.
Keywords : Dreux-Corrise, flexural strength, lightweight concrete, polyethylene
terephthalate, wiremesh