Aggregates are porous and can soak up water. If an aggregate has high absorption , it will "steal" water from the cement paste, making the concrete hard to work with. Conversely, if it is already wet, it adds extra water to the mix, which can weaken the final structure. 2. The Saturated Surface-Dry (SSD) Concept
Aggregates are porous and can soak up water. If an aggregate has high absorption , it will "steal" water from the cement paste, making the concrete hard to work with. Conversely, if it is already wet, it adds extra water to the mix, which can weaken the final structure. 2. The Saturated Surface-Dry (SSD) Concept