Abstract
In reinforcing the surface Layer of concrete, the results of experiments performed to reinforce the surface layer are described. In these experiments, the water cement ratio was reduced using a permeable sheet. The water permeable formwork method was used in combination with unwoven fabric sheets in order to density the surface layer of concrete. The results of these experiments indicated that the surface layer strength could increase if the surface is densities. Large specimens reinforced using the water permeable formwork method were placed on a seashore and at a certain inland point to examine changes in the surface layer strength relative to material aging and to verify an improvement in the strength of the concrete surface. As a result, the effectiveness of the water permeable formwork method was demonstrated.
