Pengaruh Penambahan Mikroba untuk Meningkatkan Kepadatan Pasta Berbahan Fly Ash
Abstract
Industri konstruksi membutuhkan inovasi bahan bangunan untuk memenuhi persyaratan ekologis dan ekonomi. Bahan bangunan inovatif dapat memberikan kontribusi besar bagi efisiensi sumber daya. Studi ini dilakukan untuk mengetahui pengaruh penambahan mikroba kedalam pasta berbahan fly ash yang dapat digunakan sebagai bahan alternatif bahan konstruksi bangunan. Mikroba yang digunakan merupakan jenis sporosarcina pasteurii. Volume mikroba yang ditambahkan 0-5000 ml/m3. Pasta tersebut dimanfaatkan sebagai bahan agregat buatan. Pengujian karakterisasi agregat yang dilakukan seperti berat jenis, resapan, keausan dan porositas. Hasil pengujian karakterisasi agregat buatan kemudian dibandingkan dengan agregat natural. Hasil penelitian menunjukkan pada umur 7 hari, kuat tekan pasta dengan penambahan volume mikroba maksimum memiliki kekuatan yang lebih tinggi dan pori yang rendah. Selain itu, berat jenis agregat buatan lebih ringan daripada berat jenis agregat agregat natural. Nilai penyerapan dan keausan agregat buatan ini lebih tinggi jika dibandingkan dengan agregat natural. Pori yang lebih tinggi pada agregat buatan berdampak pada karakteristik agregat yang lebih rendah dibandingkan dengan agregat natural. Walaupun demikian, dibuktikan bahwa dari uji karakteristik, agregat buatan ini masuk dalam persyaratan dan dapat digunakan sebagai pengganti agregat natural.
Departemen Teknik Sipil, Institut Teknologi Sepuluh Nopember, SurabayaFull Text:
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DOI: http://dx.doi.org/10.12962/j26151847.v5i3.15358
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