Pengaruh Penggunaan Abu Sekam Padi terhadap Sifat Mekanik Beton Busa Ringan

Triastuti -, Ananto Nugroho

Abstract


Abstrak


Saat ini pemanasan global menjadi isu yang menarik bagi para aktivis lingkungan hidup. Dalam bidang konstruksi, terutama bidang bahan bangunan, penggunaan semen Portland dalam pembuatan beton menjadi salah satu penyumbang penyebab pemanasan global. Oleh karena itu, saat ini para peneliti bidang material mencoba untuk mencari alternative bahan penganti semen Portland. Sekam padi yang merupakan salah satu produk dari bidang pertanian yang dihasilkan oleh tanaman padi, banyak sekali ditemukan di negara-negara tropis, seperti di Indonesia. Pemanfaatan abu sekam padi sudah dari dulu digunakan sebagai bahan penganti semen Portland dalam pembuatan beton. Penelitian ini bertujuan untuk memanfaatkan abu sekam padi dalam pembuatan beton busa ringan. Persentase kadar abu sekam padi yang digunakan dalam penelitian ini adalah 0%, 10%, 15% dan 20% dari berat semen. Pengujian yang dilakukan meliputi pengujian berat jenis, kuat tekan dan kuat lentur. Berat jenis yang dihasilkan oleh beton busa ringan sebesar 700 kg/m3. Kuat tekan terbesar didapat pada kadar abu sekam padi sebesar 15% dan 20% yaitu 1.45 MPa. Beton busa ringan tanpa menggunakan abu sekam padi menghasilkan kuat lentur terbesar yaitu sebesar 0.76 MPa.

Abstract

Nowadays, global warming is a big issue for activist of environment. On construction, especially in building material, utilization of Portland cement on concrete material is one of contribution of global warming. Therefore, recently, many researchers of building material try to search material alternative to substitution cement Portland. Rice husk is one of agriculture product which was produced by rice, it can be found in tropic country such as Indonesia. Utilization of rice husk ash has been used a long time ago to substitute cement Portland on concrete. The aim of this research is to use rice husk ash on the lightweight foam concrete. Percentage of rice husk which used in this research are 0%, 10%, 15% and 20% of cement Portland (by weight). The test of characteristic of lightweight foam concrete in this research are the density test, compressive strength test and flexural strength test. The density is less than 700 kg/m3. The highest of compressive strength is 1.45 MPa on 15% and 20% rice husk ash. Then the highest of flexural strength is 0.76 MPa on 0% rice husk ash.


Keywords


Abu sekam padi, beton busa ringan, berat jenis, kuat tekan, kuat lentur.

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DOI: http://dx.doi.org/10.5614%2Fjts.2017.24.2.4

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