| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for reducing a fallen wool rate in a rock wool spray method using rock wool, cement and water, the rock wool spray method being adopted for imparting fire resistance, fire proofness, sound absorbency or heat insulation to members of a structure.SOLUTION: The rock wool spray method comprises: a step of applying a load of 82 g/cmto a rock wool aggregate whose movement in the horizontal or vertical direction is restricted, over five minutes in the vertical or horizontal direction, and then releasing the load to be 5 g/cmor lower and finding the bulk density of the rock wool aggregate after releasing the load; and a step of, when the bulk density found in the step is 130 kg/mor lower, constructing a rock wool coating layer in a semidrying technique using at least the rock wool aggregate having the bulk density, cement and water. |
