人工軽量コンクリートを用いたスラブの曲げ耐力

概要

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The object of this study is to examine the strength and deformation characteristics of reinforced concrete slabs made of structural lightweight aggregate (Lionite sand and gravel-pelletized type), in order to ascertain the adequate safety of the composite slab structures to which the material is applied. Twelve slab specimens having 3/5 scale to standard design dimensions, and sixteen beam specimens were tested under static load to failure with various support and loading conditions. Normal concrete specimens were also tested for the purpose of comparing the characteristics of lightweight ones. This limited investigation indicates that the Lionite concrete has almost the same strength properties as normal one and may be used with sufficient safety. As to the deformation, lionite concrete specimens showed a little larger deflection than of modulus of elasticity. Two-span continuous slab specimens were considered to have failed in punching shear, though the corresponding simple slab specimens were in bending moment. This indicates that the carrying capacity of slab structures should be examined for punching shear rather than for bending moment when the degree of restrainment becomes higher.
社団法人日本材料学会の論文
1966-10-15