
The News 27/08/2025
Temperature Control in Mass Concrete: Solutions & Lessons from the Hoover Dam
In mass concrete construction, the heat of hydration has always been a “hidden variable” that troubles many engineers and contractors. When cement reacts with water, an enormous amount of heat is generated and trapped inside the massive concrete body. Without proper control, excessive temperatures and the temperature gradient between the core and the surface can cause dangerous thermal cracks, threatening both the durability and safety of the structure. This challenge is not just theoretical—it has been marked in history with a classic lesson: the Hoover Dam (USA), one of the greatest concrete megastructures of the 20th century. Containing millions of cubic meters of concrete, the dam would have taken hundreds of years to cool naturally. Engineers had to devise unprecedented solutions: segmenting the mass, actively cooling it through a network of circulating cold-water pipes, and applying a combination of innovative measures to bring the concrete temperature down to safe levels.