Mass Concrete with Reduced Heat of Hydration

Mass concrete, which is the pouring of concrete in large dimensions requires that measures be taken to cope with heat generation resulting from the hydration of cement and attendant volume change, to minimize cracking. Low-temperature rise is often achieved by limiting the total cement amount as much as possible, and by the use of moderate heat Type II cement as covered by ASTM C 150, and the replacement of cement with Pozzolans and ground slag, the correct proportioning of aggregates in the concrete mixture and the use of chemical admixtures.

Holderchem supplies a range of products used in the production of mass concrete, including the following:

• Blended types of cement with moderate heat of hydration, incorporated in the mass concrete mix as a total or partial replacement of Portland cement.
• Ground granulated blast furnace slag (GGBFS), incorporated in the mix to alleviate early-age temperature rises of Portland cement.
• High-range water reducers, medium-range water reducers, and water reducers to compensate for the reduction of water.
• Air-entrainers for volume change and increased resistance to sulfate attacks.
• Retarding admixtures to delay setting times.
• Pumping aids to facilitate the pumping ability of concrete when required.

Holderchem provides guidance on all aspects of mass concrete production from mix to batching, mixing, placing, consolidating finishing, and curing.