| 摘要 |
PROBLEM TO BE SOLVED: To provide a test method, for the water permeability of a constructional material, wherein the water permeability of the constructional material which has been waterproofed weakly only so as to display an effect on water close to zero pressure can be evaluated in a short time even when the constructional material is not situated on a horizontal plane. SOLUTION: A container 50 as a water-permeability test device is filled with the water in a definite amount. A frame 20 is installed in the water so as to be by a prescribed size higher than its water surface 40, The frame is covered with a hydrophilic cloth 30 in such a way that both ends of the hydrophilic cloth 30 are immersed sufficiently in the water by crossing the frame 20 and that the air does not creep between the frame 20 and the hydrophilic cloth 30. A test piece 10 whose cut end faces are waterproofed and whose weight is known is placed on the hydrophilic cloth 30, A water change amount is measured on the basis of the weight of the test piece after a prescribed time has elapsed. Thereby, the water permeability of the constructional material is evaluated.
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