Laboratory Experiments on the Effect of Moisture Content on Fire Propagation and Overhang Phenomenon in Burnt Tropical Peat Samples
(Uji Laboratotium Pengaruh Kadar Air terhadap Penyebaran Api dan Fenomena Overhang pada Sampel Gambut Tropika Terbakar)
DOI:
https://doi.org/10.59465/jpht.v22i1.728Kata Kunci:
gambut; kadar air; overhangingAbstrak
Abstract
Peat fires are categorized as ground fires and are often accompanied by the formation of overhangs,
which indicate deep peat fire occurrences. This study aims to examine how peat fires propagate
under different moisture contents and how this affects the formation of overhangs at a laboratory
scale. The parameters assessed include temperature changes over time, propagation rate,
temperature distribution, and the visual presence of overhangs. Peat samples with 8%, 15%, and 23%
moisture content were tested. The results showed that heat lasted the shortest in the 23% moisture
content samples. Fire propagation was faster in the vertical direction than horizontally. Differences
in temperature distribution at the start of combustion were caused by a shift in the coil heater. Notably,
overhang structures were visually identified only in the 23% moisture content samples, while the 8%
and 15% samples showed only the subsidences.
Keywords: Peat fires, combustion, subsidence
Abstrak
Kebakaran gambut dikategorikan sebagai kebakaran bawah permukaan (ground fire) dan sering
disertai dengan terbentuknya overhang yang menunjukkan terjadinya pembakaran gambut dalam.
Penelitian ini bertujuan untuk mengkaji bagaimana penyebaran api pada gambut dengan kadar air
yang berbeda serta dampaknya terhadap pembentukan overhang pada skala laboratorium. Parameter
yang diamati, meliputi perubahan suhu terhadap waktu, laju penjalaran api, distribusi suhu, dan
keberadaan visual overhang. Sampel gambut dengan kadar air 8%, 15%, dan 23% digunakan dalam
percobaan. Hasil penelitian menunjukkan bahwa panas paling cepat hilang pada sampel dengan kadar
air 23%. Penyebaran api lebih cepat terjadi secara vertikal dibandingkan horizontal. Perbedaan
distribusi suhu pada awal pembakaran disebabkan oleh pergeseran koil pemanas. Secara visual,
struktur overhang hanya teridentifikasi pada sampel dengan kadar air 23%, sedangkan pada sampel
8% dan 15% hanya menunjukkan subsidensi.
Kata kunci: Kebakaran gambut, pembakaran, subsidensi
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