Quality Attainment for Concrete Structures Using Visual Evaluation Method

Abstract

The quality of the surface layer of concrete, which significantly affects the durability of concrete structures, is greatly influenced by construction factors. This paper introduces a visual evaluation method that leads to quality improvement through application of the PDCA cycle based on evaluation of the quality of the surface layer by naked eyes. The visual evaluation method herein described was developed for general structures such as piers and abutments, and for tunnel lining concrete. The characteristics of the visual evaluation method identified in the process of experimental construction applying this method for quality attainment are described, and various ideas implemented by contractors during the experimental construction and their results are introduced.