Pengaruh Penambahan Serat Polypropylene Fiber Mesh (PFM) Terhadap Momen Lentur, Kuat Tekan dan Workability Beton

Sianipar, Aaron Zaneta (2022) Pengaruh Penambahan Serat Polypropylene Fiber Mesh (PFM) Terhadap Momen Lentur, Kuat Tekan dan Workability Beton. S1 thesis, Universitas Kristen Indonesia.

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Abstract

Menurut data dari Kementrian Lingkungan Hidup dan Kehutanan (MENLHK) sampah yang dihasilkan oleh 226 kabupaten/kota se-indonesia mencapai 28.569.316 juta ton per tahun. Sampah yang tidak terkelola mencapai 35,46% atau 10.129.984 juta ton per tahun dimana 15,6% diantaranya merupakan sampah plastik. Hal ini tentu saja berdampak bagi lingkungan karena sampah plastik merupakan sampah yang sangat sukar didaur ulang. Dari permasalahan tersebutlah, peneliti ingin memanfaatkan limbah sampah plastik sebagai bahan penambah dalam pembuatan beton. Beton memiliki sifat getas atau rapuh yang akan berdampak terhadap momen lentur jika beton diberikan sejumlah beban sehingga penambahan serat menjadi solusi untuk mengatasi masalah tersebut. Serat Polypropylene termasuk kedalam jenis serat termoplastik yang jika dicampurkan kedalam beton dapat meningkatkan sifat mekanis beton menjadikan beton lebih ductility dan akan meningkatkan nilai kuat tekan dan momen lentur (Suhardiman, 2011). Metode yang digunakan peneliti adalah metode kuantitatif dengan eksperimental dilaboratorium teknologi bahan Fakultas Teknik Universitas Kristen Indonesia (UKI). Mix Design yang digunakan dalam membuat campuran perencanaan beton sesuai SNI 7656-2012 dengan rencana kuat tekan f’c 25 MPa. Dari hasil pengujian kuat tekan pada benda uji balok berukuran 15cm x 15cm x 60cm pada umur 14 dan 28 hari dapat dilihat bahwa terjadi kenaikan nilai kuat tekan pada kadar 0,7 kg/m3 dengan hasil kuat tekan 29,93 MPa atau naik sebesar 9,53% dari beton normal dan 30,83 MPa atau naik sebesar 12,72% dari beton normal. Peningkatan juga diikuti nilai momen lentur pada kadar dan jumlah umur benda uji yang sama yaitu sebesar 11231116,95 N.mm untuk umur 14 hari dan 13796629,6 N.mm untuk yang berumur 28 hari. Demikian juga terjadi peningkatan nilai momen lentur pada benda uji usia 14 hari sebesar 11231116,95 N.mm dan usia 28 hari sebesar 13796629,6 N.m. Kata kunci: Beton ramah lingkungan, Beton Serat, Serat Polypropylene, Momen lentur, Kuat Tekan/According to data from the Ministry of Environment and Forestry (MENLHK), the waste produced by 226 regencies/cities throughout Indonesia reaches 28,569,316 million tons annually. Unmanaged waste reaches 35.46% or 10,129,984 million tons per year, of which 15.6% is plastic waste. This, of course, has an impact on the environment because plastic waste is waste that is very difficult to recycle. From these problems, researchers want to use plastic waste as an additive in manufacturing concrete. Concrete has brittle or brittle properties, which will impact the bending moment if the concrete is given a certain amount of load, so adding fiber is a solution to overcome this problem. Polypropylene is a type of thermoplastic fiber that, when mixed into concrete, can improve the mechanical properties of concrete so that the concrete becomes more ductile and will increase the value of compressive strength and bending moment (Suhardiman, 2011). The method used by the researcher is a quantitative method with an experimental material technology laboratory at the Faculty of Engineering, Universitas Kristen Indonesia. Mix Design used in making the concrete mix design following SNI 7656-2012 with a planned compressive strength of f'c 25 MPa. From the results of the compressive strength test on the beam specimen measuring 15cm x 15cm x 60cm at the age of 14 and 28 days, it can be seen that there is an increase in compressive strength at a level of 0.7 kg/m3 with a compressive strength result of 29.93 MPa or an increase of 9, 53% of standard concrete and 30.83 MPa or an increase of 12.72% of standard concrete. Similarly, the value of the bending moment on the beam specimens increased by 11231116.95 N.mm for age 14 days and by 13796629.6 N.mm for ages 28 days. The increase was also followed by the value of the bending moment at the same level and amount of age of the test object, namely 11231116.95 N.mm for the age of 14 days and 13796629.6 N.mm for the age of 14 days. Keywords: Environmentally friendly concrete, Fiber Concrete, Polypropylene, Bending moment, Compressive Strength

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