コンクリート用骨材とセメントペーストとの付着に関する実験的研究

概要

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In this investigation, portland cement paste-aggregates bond strength are tasted and desigened to show how strongly cement pasts adhessiveness to the aggregates by charactericities that are aggregates surface potential, roughness, contact angle, water cement rate, surface active agent, age and different aggregates. Cement paste-aggregates bond strength were determined by measuring the tensile load to ruptur of the bond. Aggregate surface potential was determind by potential. Roughness wasmas measured by JIS B 0691 Contact Angle was determind by potical. The conculsion summarized below. 1. Electrical surface properties of aggregates are depend upon the component of aggregates, therefore, in a certain liquid, aggregates surface shows both plus and minus is electrical potential. 2. I week cement paste-aggregates bond strength are determined and after the I week of bond strength was found to be greater than 1 week value slowly but it is not significant. 3. The strength of cement paste-aggregate bond strength decrease with increasing water cement, at a rate of which corresponds to an appoximately linear relationship between the proption of water cement ratio in paste. 4. The rougher the surface and bigger the surface potentials, the bigger the adhesive strength, but this relation is not linear.
社団法人日本建築学会の論文
1967-10-30