.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