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Title: Hot Weather Concreting

Author(s): ACI Committee 305

Publication: Materials Journal

Volume: 88

Issue: 4

Appears on pages(s): 417-447

Keywords: admixtures; air entrainment; concrete construction; cooling; curing; evaporation; finishes; heat pump systems; high temperature; hot weather concreting; humidity; ice; inspection; liquid nitrogen; mixing; placing; pozzolans; production methods; retardant

DOI: 10.14359/1943

Date: 7/1/1991

Abstract:
When concrete is mixed, transported, and placed under conditions of high ambient temperature, low humidity, solar radiation, or wind, an understanding of the effects these environmental factors have on concrete properties and construction operations is required. Once these factors are understood, measures can be taken to eliminate or minimize undesirable effects. The most serious difficulties are experienced in weather and types of construction that are unusual in the experience of those performing the work. This committee report defines hot weather, lists potential problems, and presents practices intended to minimize them. Among these practices are such important measures as selection of materials and proportions; precooling ingredients; consideration of concrete temperature as placed; length of haul; facilities for handling concrete at the site and during the early curing period; special batching, placing, and curing techniques; and appropriate testing and inspecting procedures in hot weather conditions. A selected bibliography is appended.