• The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Extended Workability of Concrete Containing High-Range Water-Reducing Admixtures in Hot Weather

Author(s): James S. Hampton

Publication: Symposium Paper

Volume: 68


Appears on pages(s): 409-422

Keywords: admixtures; field tests; high temperature; hot weather -- construction; lightweight aggregates; mix proportioning; placing; plasticizers; portland cements; pumped concrete; slump tests; water-reducing agents; workability.

DOI: 10.14359/6484

Date: 1/1/1981

Normally in hot weather, it is difficult to maintain the workability of concrete containing high-range water-reducing admixtures (H-R W-RA) as the concrete temperatures approach 85 - 90°F(29 to 32oC). The loss of fluidity and workability often occurs within 30 min. after the introduction of the adrnix-ture making placement and pumping very difficult if there are delays. This paper discusses how certain modified H-R W-RA may be used to provide fluidized concrete with prolonged work-ability.