When most people think of Mass Concrete, the first thing that comes to mind are large dam projects such as the Hoover Dam that borders both Arizona and Nevada, and other Corps of Engineer dam projects built in the 1930’s thru 1960’s. In fact, most of the information contained in ACI 207 ‘Mass Concrete’ was derived for, and from those types of projects.

Learning Objectives: 1) Explain ‘Massive Structural Concrete “Can’t keep it Cool? Keep it Warm”, an alternative approach to designing, placing, and protecting mass concrete structures. 2) How to insure that the internal maximum temperature is no more than 35°F greater than the external temperature. 3) Describe how to place a hard trowel finish on the surface of a low heat, slow setting mass concrete mix, in a cold environment. 4) Discuss how long it takes for heat to dissipate from a mass structure.