温度応力によるコンクリ-トスラブの劣化について

概要

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When temperatures in a concrete slab vary, temperature stresses are set up in it. If these stresses exceed the tensile strength of the slab, it may be considered that cracking occurs in the slab. This paper deals with an experimental study for deterioration or crack of concrete slabs by temperature stresses. The results are as follows : 1) The detrioration of concrete slabs by temperature stresses was confirmed by measuring dynamic modulus of elasticity, calculating deteriorative ratios and observing cracks on the surface of the slabs. 2) The concrete with water cement ratio of 75%t was more deteriorative than that of 45% or 60% under temperature stresses. 3) The larger the differences of temperature, the more deteriorative the concrete, and deterioration of concrete progressed by repetition effect of temperature stresses. 4) Concrete and mortar with the same water cement ratio showed a similar tendency with respect to deterioration by temperature stresses.
三重大学農学部の論文