Abstract
The exothermicity of the basalts (IDL-1, IDL-2 and IDL-3) from Idaho State were investigated. The densities of the three samples were in the range of 2.90–3.01 g/cm3, and the residues of each sample after firing with a gas torch were in the range of 97.8–98.5%. The 1st and 2nd TG/DSC thermal analyses (25–900 °C) of IDL-1 showed that about 4% and 2% of some gas components were emitted. When coated on a halogen lamp (200 V, cooling fan OFF), the temperatures (426–441 °C, average value: 433 °C) of IDL-1, IDL-2 and IDL-3 were much higher than that (356 °C) of the AT binder. When coated on a ceramic board (IDL-1:binder = 7:3, V: 200 V, cooling fan OFF), the average temperature value (405 °C) of the six coated points was higher than that (369 °C) of the six blank points. In conclusion, a considerable amount of the basalt of Idaho State has exothermic property as does the basalt of Unbong-san (Unbong-seok).
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