ANALISA KEKUATAN KOMPOSIT TANAH LIAT BERPENGUAT SERAT KELAPA DAN SERAT BAMBU DENGAN FILLER ABU SEKAM SEBAGAI BAHAN ALTERNATIF BATA EKSPOS
Abstract
meningkatkan kualitas bata ekspos yang ramah lingkungan. Penelitian ini bertujuan
menganalisis pengaruh variasi fraksi serat sabut kelapa dan serat bambu dengan filler abu sekam
padi terhadap sifat fisik dan mekanik komposit tanah liat sebagai bahan alternatif bata ekspos.
Komposisi matriks–penguat divariasikan sebesar 95%:5%, 92,5%:7,5%, 90%:10%,
87,5%:12,5%, dan 85%:15%, sedangkan perbandingan serat kelapa, serat bambu, dan abu
sekam padi dijaga konstan sebesar 40%:40%:20% dari total penguat. Serat kelapa sepanjang 1
cm, serat bambu 2 cm, dan abu sekam padi berukuran 80–100 mesh dicampur secara manual
selama 10 menit, kemudian dicetak pada tekanan 50 bar selama 1 menit, dikeringkan hingga
massa konstan, dan dibakar pada suhu 600°C selama 5 jam. Karakterisasi meliputi pengujian
densitas, porositas, kuat tarik, kuat tekan, serta pengamatan mikrostruktur menggunakan SEM.
Hasil penelitian diharapkan menunjukkan adanya komposisi optimum yang mampu
meningkatkan kekuatan mekanik dan mengendalikan porositas bata ekspos. Temuan ini
berpotensi mendukung pengembangan material bangunan berbasis sumber daya lokal yang lebih
berkelanjutan dan bernilai tambah.
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DOI: http://dx.doi.org/10.17977/um054v9i1p137-149
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