for various applications, namely foundations, paving,reinforced and prestressed concrete, has been examined by the authors and reported elsewhere [6, 7]. In this,methods were established for taking account of inherent RCA characteristics in the production of concrete that is stable in the fresh state and able to develop properties comparable to corresponding natural aggregate concrete in the hardened state. Furthermore, the work suggested that the use of coarse RCA may be extended to highstrength concrete, thus offering further added value outlets for the material.
The use of RCA in high-strength concrete has been examined in relatively few studies and experimental data are limited. A study considering high-strength concrete containing coarse RCA contents of 5, 10 and 12.5% indicated that the strength at a given water/cement (w/c)