“…In addition, many studies provide strategies to optimize the performance of RAC, among which three groups can be highlighted: the use of SCMs, RAC procedural improvements, and pretreatment of RA. The use of pozzolanic SCMs as a strategy to increase the resistance of concrete to sulfate attack has shown equal or even superior efficiency in RACs compared to their respective conventional concretes (NACs) [45,54,62,65,66,71,72,78,90,91,146,147]. This is extremely important because it means that eco-efficient concretes (such as those with RA and a lower clinker factor) can perform as well as or better than comparable conventional concretes in terms of resistance to sulfate attack.…”