抄録
Deterioration of sprayed asbestos affects human health problems. To evaluate the deterioration, qualitative observations by trained engineers are common in Japan. The human health problems come from asbestos fibers emitted by shocks of air currents, earthquakes and so on. This inspires the authors a unique evaluation method; a given current velocity and quantity of air is applied to the surface of sprayed asbestos, and numbers of emitted fibers are counted. As a result obtained at 11 buildings, the number of fibers is well coincide with the conventional observation method. This may show possibility of quantitative observation using the new method.
