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ACI 305.1-06
Specification for
Hot Weather Concreting
An ACI Standard
Reported by ACI Committee 305
First printing
March 2007
American Concrete Institute
Advancing concrete knowledge
Specification for Hot Weather Concreting
Copyright by the American Concrete Institute, Farmington Hills, MI. All rights reserved. This material
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ISBN 978-0-87031-242-7
ACI 305.1-06
Specification for Hot Weather Concreting
An ACI Standard
Reported by ACI Committee 305
K. Philip Brandt
Kenneth Rear
James M. Aldred
Godwin Q. Amekuedi
Daniel E. Ellery*
Darrell F. Elliot
Kenneth C. Hover
Michael L. Kohout
Bruce G. Smith
Edward G. Sparks
Michael A. Caldarone
James N. Cornell II
Richard D. Gaynor
Antonio J. Guerra
Frank A. Kozeliski
Darmawan Ludirdja
Boris Y. Stein
Kenneth C. Tiffany
D. Gene Daniel
Kirk K. Deadrick
G. Terry Harris, Sr.
Jerry S. Haught
Dan Ravina
Robert J. Ryan
Louis R. Valenzuela
This specification provides requirements for hot weather concreting that
the Architect/ Engineer can make applicable to any construction project by
citing it in project specifications.
It is intended that the Architect/Engineer use the checklists included in
this specification to customize the project specification.
The document includes hot weather requirements for production
preparations, delivery, placement, finishing, bleed-water evaporation,
curing, and protection of concrete. Provisions governing a preplacement
conference, concrete mixture proportions, maximum allowable concrete
temperature, measurement of the rate of surface evaporation, evaporation
control measures, and acceptance of a concrete mixture from past field
experience or preconstruction testing are included.
Keywords: bleeding; concrete, curing; finishing; hot weather concreting;
mixture proportioning; plastic shrinkage cracking; protection period; trial batch.
This specification is incorporated by reference in the
Project Specification using the wording in P3 of the Preface
and including information from the Optional Requirements
and Submittals checklists following the Specification.