Analisa treatment optimal terhadap kuat tekan beton cangkang kelapa sawit = Optimal treatment analysis of strong concrete press palm kernel shells

Sudarsono, Andy (2020) Analisa treatment optimal terhadap kuat tekan beton cangkang kelapa sawit = Optimal treatment analysis of strong concrete press palm kernel shells. Bachelor thesis, Universitas Pelita Harapan.

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Abstract

Indonesia merupakan negara agraris sehingga banyak lahan yang dijadikan persawahan maupun perkebunan, salah satu yang terbesar adalah perkebunan kelapa sawit. Perkebunan kelapa sawit di Indonesia setiap tahunnya terus meningkat, seiring dengan dukungan progam-progam pemerintah mengenai energi yang terbarukan. Sehingga limbah cangkang kelapa sawit di Indonesia turut meningkat. Salah satu inovasi yang dapat mengurangi jumlah limbah cangkang kelapa sawit yang ada adalah penggantian agregat kasar dengan cangkang kelapa sawit dalam pembuatan beton. Cangkang kelapa sawit sendiri memiliki kandungan minyak sehingga perlunya adanya proses treatment terhadap cangkang kelapa sawit. Hal ini bertujuan untuk mengurangi kandungan minyak yang ada, karena adanya minyak dalam beton akan mengurangi kuat tekan dari beton. Penelitian ini bertujuan untuk mencari hasil kuat tekan beton cangkang kelapa sawit yang optimal dari treatment cangkang kelapa sawit. Treatment cangkang kelapa sawit yang dipakai dalam penelitian ini adalah bilas air, cuci deterjen selama 20 menit, rendam deterjen selama 24 jam, rendam n-heksana selama 24 jam dan rendam n-heksana selama 72 jam. Didapat hasil treatment dari rendam n-heksana selama 72 jam menyisakan sedikit lapisan minyak pada hasil rendaman 1 malam sebelum pengecoran. Hasil pengecoran beton yang menggunakan cangkang kelapa sawit yang dengan treatment perendaman menggunakan n-heksana selama 72 jam paling efektif, karena kuat tekan yang dihasilkan dalam treatment rendam heksana selama 72 jam pada hari ke 28 adalah 13,36 Mpa dan berat jenis 2036,36 kg/m3. Selain itu penggantian expanded clay dengan cangkang kelapa sawit dengan treatment deterjen dapat menekan biaya produksi hingga hingga 87%. Tetapi, dengan penggunaan cangkang kelapa sawit dengan treatment ¬n-heksana membuat biaya beton cangkang lebih mahal dibandingkan beton expanded clay karena bahan n-heksana yang mahal./ Indonesia is an agrarian country so much land is used as rice fields and plantations, one of the largest is oil palm plantations. Oil palm plantations in Indonesia continue to increase every year, along with the support of government programs on renewable energy. So the waste of palm oil shells in Indonesia is also increasing. One innovation that can reduce the amount of existing palm shell waste is the replacement of coarse aggregates with palm shells in concrete making. Palm oil shell itself has oil content so the need for treatment process against palm shell. This aims to reduce the existing oil content, because the presence of oil in the concrete will reduce the strong press of the concrete. This research aims to find strong results of optimal palm shell concrete press from palm shell treatment. The treatment of palm shells used in this study is rinse water, wash detergent for 20 minutes, soak the detergent for 24 hours, soak n-hexsana for 24 hours and soak n-hexsana for 72 hours. Obtained from the treatment of n-hexane soak for 72 hours left a little layer of oil on the soak 1 night before casting. The result of concrete casting using palm oil shell with immersion treatment using n-hexsana for 72 hours is most effective, because the compressive strength in hexane soak treatment for 72 hours on the 28th day is 13.36 Mpa and concrete density 2036.36 kg/m3. In addition, the replacement of expanded clay with palm shell with detergent treatment can reduce production costs by up to 87%. However, the use of palm shells with treatment n-hexane makes the cost of concrete shells more expensive than expanded clay concrete due to the expensive n-hexane material.

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