Define Internal Curing
When a concrete mixture is internally cured, a component that acts as a curing agent is introduced to it. It is possible to use saturated porous aggregates or superabsorbent polymers as the curing agent.
Define Superabsorbent Polymers
Concrete can also be internally cured by using superabsorbent polymers. If SAP comes into contact with water, it swells and becomes gel like. A superabsorbent polymer swell between 20 and 2000 times its own mass in water. Upon contact with other ionic substances, such as salt, the superabsorbent polymers release the absorbed water.