Water sorption properties of hardened cement paste cured or stored at elevated temperatures

Abstract Structural changes take place when mature hardened cement paste cured at room temperature is heated. BET V m values were found to decrease as a function of the time the specimens had been stored in water either at 60°C or at 100°C. The decrease is greatest at 100°C. The complete water adsorption isotherms show that heating also makes the pore structure more coarse. The development of BET surface areas for pastes cured near 100°C depend strongly on the temperature history before the curing temperature is reached.