The effect of different CGA contents on stress versus specific strain behavior of concrete at a fixed slump range was obtained from the compressive tests performed after 28 days of curing, and can be seen in Fig. 8. It is clearly seen from the typical curves plotted up to the maximum stress point, that the combined effect of superplasticizer and CGA did not have a significant effect on the shape of stress-strain curves, and, consequently, on Young’s mod- ulus (Table 7). The values of Young’s modulus ranged from 23.0 to 24.2 GPa. This behavior can be attributed to good quality of the granite used to produce a fine aggregate. Donza et al. [1] reported a decrease in Young’s modulus, due to the replacement of natural sand by crushed dolomite, derived from a rock which is not as strong and tough as granite. Table 7 also shows the water absorption results. No significant difference were noted between C-REF and C-CGA10 on the water absorption. The same behavior was found for C-CGA30 and C-CGA50, which were significantly lower than the other mixtures. These results are in agreement with the mechanical results, and could indicate a good performance of CGA concretes on durability aspects. Further research is needed to confirm these findings.