圧密理論を適用した真空脱水工法の脱水メカニズムに関する基礎的研究

概要

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The strength and hardness of concrete slab surface is considered significantly affected by bleeding of concrete. It has been reported that dewatering by vacuum processing is quite effective to make concrete high density and high strength. The method, however, has not been successfully used for the concrete works in the field of building construction, compared with that of civil engineering works in Japan. In the earlier report, the authors have already pointed out that there is a strong relationship between the strength distribution and density distribution in the vacuum processed concrete, both gradually decreasing from the top surface to about 15 cm depth of concrete. Main purpose of the present study is to discuss the mechanism of the occurrence of such distribution of strength and density, based on consolidation theory. In the experiment, pore water pressure distribution in concrete has been measured using the original measuring system. As a result, it has been confirmed that the consolidation theory is quite effective to explain the internal properties of vacuum processed concrete as well as those of press-dewatered concrete.
2004-11-30