Abstract
We propose a simple measurement method employing a profile gauge as a quantitative abrasion measurement technique for use during cementitious surface repair work. This method begins with the installation of anchors at two locations on the coated surface to serve as reference points. Next, the area enclosed with the abrasion surface and the reference line connecting the reference points, within certain range in reference line, is calculated from photographed image. And the average distance to the coated surface is obtained by dividing this area by the measurement range length. In order to clarify the degree that various factors impact the measurements, we conducted field measurements on channels with coated surfaces and compared the results of measurements of abrasion quantity using a high-precision laser displacement meter with the results of measurements by the profile gauge. The results showed that when used to measure quantity of abrasion of channels with smooth surface coating, this new method obtained measurement values little different from the values obtained by the laser displacement meter. The accuracy of a single measurement estimated based on the field measurement was the laser measurement value ±0.4mm. It has a potential to be an effective simple measurement method of abrasion of cementitious surface.
