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一、前言结硬混凝土的内部组织,是一种含有毛细管和空隙的多孔体,其透气性比透水性敏感600～3000倍,且具有显著地为干燥条件所左右等特性。本研究,从混凝土本来就具有透气性出发,通过在混凝土内渗透能和水泥水化物起反应的某种气体来进行试验。原先设想混凝土是不会自然毀坏的,但结果,当硫化氢渗透混凝土时,却发生了混凝土自然毀坏的现象,从而发现了混凝土衰变的新事实。本报告根据试件的试验,论述了有关混凝土破坏手段的基本试验结果,启示了应用于实际结构构件的可能性。
I. INTRODUCTION The internal structure of knotty concrete is a kind of porous body with capillaries and voids. Its air permeability is 600 ~ 3000 times more permeable than that of water permeability, and it is obviously influenced by the drying conditions. This study, starting from the inherently breathable nature of concrete, was tested by infiltrating a gas that reacts with cement hydrates within the concrete. It was originally conceived that concrete would not naturally be destroyed, but as a result, when the hydrogen sulphide penetrated the concrete, a natural destruction of the concrete took place and a new fact of decay of the concrete was discovered. Based on the test of the test piece, this report discusses the basic test results on concrete failure means, revealing the possibility of application to actual structural components.