軽量骨材を用いたコンクリートの細孔構造に及ぼす諸要因とその影響

概要

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Porosity of concrete was varied by the influence of water cement ratio, curing method, age and so on. The influence, which porosity has on properties of concrete, of lightweight aggregate concrete tends to be stronger than that of normal weight concrete. From this point of view, porosity of lightweight concrete which varied factors such as water cement ratio, curing method, age, types of aggregate and sampling place, was measured These results are summarized as follows, a) Changes in contained moisture of concrete are much influenced by water cement ratio and moisture content of aggregate, in the case that be used light weight aggregate, it depends on characteristics of aggregate, surface texture and void connection, b) Under drying condition, effects of types of aggregate on pore structure are varied by water cement ratio, and the densification of pore structure of light weight aggregate concrete tends to be possible at inner place, c) Water contained in lightweight aggregate gives influence to porosity of mortar matrix under drying condition. It depends on rate of exhalation in aggregates. The densification of pore structure of fly-ash aggregate concrete is possible within 2.0cm from the drying surface.
1999-01-30