抄録
The water absorbency of the concrete slab surface is a big factor for defective adhesion of several finishing materials. We will propose "wet filter paper method", a handy method for measuring the water absorbency.
In this method, a filter paper that is wet in advance with a fixed amount of water is contacted closely with the slab surface. Then, the decrease in wet paper mass is obtained. Initial amount of water, duration of the measurement, and some other conditions were defined experimentally, and accuracy was also verified. In addition, it was clarified that the filter mass reduction corresponds to the water penetration depth.
