EXAMINATION THE INFLUENCE OF SURFACE ROUGHNESS AND AMOUNT OF WATER OF CONCRETE FLOOR SLABS ON WATERPROOF PERFORMANCE

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  • コンクリート床版の表面粗さと水分量が防水性能へ与える影響検討

Abstract

<p> The road bridge slab waterproofing handbook states that the slab waterproofing layer should not be applied immediately after rainfall or within two weeks after placing the concrete slab, due to concerns about a decrease in adhesive strength due to residual moisture. However, in the case of large-scale repair work being carried out on the Hanshin Expressway, it is not realistic to secure a two-week process to reduce the moisture content. Therefore, in this paper, using simulated concrete slabs for which several types of base preparation methods were tested, the effect of the unevenness (surface roughness) of slabs on changes in slab moisture content over time was investigated. The effect of the surface roughness and water content of the floor slab on the performance of the waterproof layer was evaluated by the adhesion test using.</p>

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