Science and Technology of Energetic Materials

Vol.62, No.1 (2001)

Research paper

Static demolition by calcium oxide (IV)
-Thermal decomposition of calcium carbonate- (*in Japanese)
Hisaaki Fukui and Toshiyuki Nagaishi


The non - explosive demolition agent made of CaO has been appllied to break rocks and concrete structures on account of twice volume expansion in hydration of CaO. Calcination of calcium caconate is avairable for producing calcium oxide.
As for the thermal decomposition carbonates and hydrate, the two kinds of mechnism were suggested.
The first is that of the heterogeneous reaction based on diffusion of cation and growth of nuclei.
The second is that of homogeneous reaction based on cation mitgratiob to form the product.
In this report, the thermal decomposition of calcium carbonate was carried out by measuring particle size distribution, pressure dependence of CO2 gas on the decomposition and X - ray diffraction of the intermediate product to discuss the reaction mechnism. It is shown that the experimental results support the heterogeneous reaction machanim.

> Full text (Open access*)

© Copyright 1999-2017 Japan Explosives Society. All right reserved.