Thermal Properties of Reinforced Structural Mass Concrete

The in-situ temperature rise of structural reinforced mass concrete (RSMC) differs significantly from traditional unreinforced mass concrete, such as dams. The compressive strength of RSMC structures is often higher and required at earlier ages. This leads to higher cementitious materials contents and subsequent higher potential temperature rise. Two RSMC placements were monitored for temperature rise and potential harmful temperature gradients, one with a 4,000 psi design strength and the other with a design strength of 7,000 psi. The temperature rise was monitored at the center, near the surface, and at mid-point locations for up to 90 days. One mixture was also tested in the laboratory for compressive strength, elastic properties, and thermal properties under standard curing conditions and under a simulated in-situ temperature regime. This report will highlight the in-situ properties of RSMC and compare methods taken to reduce the temperature rise.