モルタル・コンクリート外壁の微細ひび割れからの漏水性状

概要

論文の詳細を見る
Cracks are common causes for rain penetration through external walls. Little is known, however, on rainwater leakage liability of fine cracks in which water absorption of the wall materials play an important role on the penetration process. In this paper, the author introduces an equation for calculating the leakage occurrence time as an function of crack width, wall thickness, pressure difference, and water absorption rate coefficient of the wall material. Results of two series of experiments on water permeability of various cracks in mortar and concrete specimen are also described. From the experiments, values for the factors concerning crack shapes and the wall material needed for applying the above equation are obtained. The range of crack width for which leakage were not observed in the experiments corresponded the crack width range below which the calculated leakage occurrence time shows remarkable increase.
2006-12-30