Adwan Bahar1, M. W. Tjaronge1*, Rita Irmawaty1
1Departemen Teknik Sipil, Fakultas Teknik, Universitas Hasanuddin, Gowa 92171, Sulawesi Selatan, INDONESIA
*Corresponding author: tjaronge@yahoo.co.jp
Studi Eksperimental Beton Berbasis Limbah: Keterkaitan UPV, Ketahanan Abrasi, dan Perilaku Akustik
Adwan Bahar(1), M. W. Tjaronge(1)*, Rita Irmawaty(1)
1Departemen Teknik Sipil, Fakultas Teknik, Universitas Hasanuddin, Gowa 92171, Sulawesi Selatan, INDONESIA
*Corresponding author: tjaronge@yahoo.co.jp
INTISARI
Peningkatan kebutuhan material konstruksi dan isu limbah beton mendorong pemanfaatan material alternatif yang lebih berkelanjutan, seperti Recycled Concrete Aggregate (RCA) dan Rice Husk Ash (RHA). Penelitian ini mengevaluasi pengaruh penggunaan RCA sebagai pengganti agregat kasar dan RHA sebagai substitusi sebagian semen terhadap karakteristik beton melalui pengujian Ultrasonic Pulse Velocity (UPV), kehilangan berat (Cantabro), dan perilaku akustik. Hasil menunjukkan bahwa nilai UPV menurun dari 4,12 km/detik (Control) menjadi 3,92 km/detik (50%RCA) dan 3,69 km/detik (100%RCA), yang mengindikasikan penurunan kualitas internal beton. Nilai kehilangan berat meningkat dari 22,54% menjadi 24,05% dan 27,99%, menunjukkan penurunan ketahanan terhadap abrasi. Sebaliknya, rata-rata penyerapan suara meningkat dari 23,72% menjadi 29,11% dan 38,19%, dengan puncak penyerapan mencapai 93,30% pada frekuensi tertentu. Perubahan ini dipengaruhi
oleh peningkatan porositas, melemahnya ITZ, serta terbentuknya jalur pori yang saling terhubung. Secara keseluruhan, beton berbasis RCA dan RHA berpotensi sebagai material ramah lingkungan dengan keunggulan pada kinerja akustik, meskipun terjadi penurunan sifat mekanik dan durabilitas.
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