Method of determining the presence or absence of chrysotile in a hardened body made of building materials

摘要

PROBLEM TO BE SOLVED: To provide a method capable of accurately determining whether or not chrysotile is contained in a cured product made of a building material. SOLUTION: This is a method for determining whether or not chrysotile is contained in a cured product made of a building material, and is a sampling step of collecting a sample for mass analysis from the cured product made of a building material. The horizontal axis is the mass analysis process to investigate the relationship between the heating temperature and the current value detected by the gasification of water molecules in the cured body made of building materials by heating, and the mass analysis of the sample. In the graph showing the above current value as the vertical axis, if there is no peak in the temperature region between the peak that should appear due to the presence of resultite and the peak that should appear due to the presence of antigolite, the chrysotile is not included. A method for determining the presence or absence of chrysotile in a cured product made of a building material, which comprises a determination step of determining that chrysotile is contained in other cases. [Selection diagram] Fig. 3