Mixed Mode Fracture Toughness of Recycled Tire Rubber-Filled Concrete for Airfield Rigid Pavements

The effect of specimen thickness and crack length on the variations of mode I and mode II stress intensity factors (SIFs) have been analyzed by using three dimensional finite element analysis (3D FEA). Center cracked circular disc specimen (CCCD) was used in this investigation. Eight values of specimen thickness to specimen radius ratio were studied numerically, varied from 0.1 to 0.8. The present experimental research has been conducted to study the effect of replacing 10% of fine aggregate by volume with crumb rubber on crack initiation angle, crack path and fracture toughness for different mode of mixity. It can be concluded that, the site of crack initiation in notched CCCD specimen was found numerically and experimentally as at the point of the longest vertical coordinate on the notch surface for different inclination notch angle. The value of normalized mode I SIF increased at the mid plane of specimen by increasing the thickness of the specimen. However, at the specimen surface this value decreased by increasing the specimen thickness. For all mode of mixity, the plane stress fracture toughness (GC) has not been affected by replacing 10% of sand by the rubber particles.

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  • English

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  • Accession Number: 01480934
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 22 2013 4:33PM