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Guide to Hot Weather Concreting - American Concrete Institute

ACI 305R-10 Reported by ACI Committee 305 Guide to Hot Weather ConcretingGuide to Hot Weather ConcretingFirst PrintingOctober 2010 ISBN 978-0-87031-396-7 American Concrete Institute Advancing Concrete knowledgeCopyright by the American Concrete Institute , Farmington Hills, MI. All rights reserved. This materialmay not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or otherdistribution and storage media, without the written consent of technical committees responsible for ACI committee reports and standards strive to avoid ambiguities,omissions, and errors in these documents.

Guide to Hot Weather Concreting. Guide to Hot Weather Concreting First Printing ... concrete materials. This guide provides measures that can be taken to ... curing hydraulic-cement concrete that adversely affect the properties and serviceability of the concrete. Most of these

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Transcription of Guide to Hot Weather Concreting - American Concrete Institute

1 ACI 305R-10 Reported by ACI Committee 305 Guide to Hot Weather ConcretingGuide to Hot Weather ConcretingFirst PrintingOctober 2010 ISBN 978-0-87031-396-7 American Concrete Institute Advancing Concrete knowledgeCopyright by the American Concrete Institute , Farmington Hills, MI. All rights reserved. This materialmay not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or otherdistribution and storage media, without the written consent of technical committees responsible for ACI committee reports and standards strive to avoid ambiguities,omissions, and errors in these documents.

2 In spite of these efforts, the users of ACI documents occasionallyfind information or requirements that may be subject to more than one interpretation or may beincomplete or incorrect. Users who have suggestions for the improvement of ACI documents arerequested to contact ACI. Proper use of this document includes periodically checking for errata for the most up-to-date committee documents are intended for the use of individuals who are competent to evaluate thesignificance and limitations of its content and recommendations and who will accept responsibility for theapplication of the material it contains.

3 Individuals who use this publication in any way assume all risk andaccept total responsibility for the application and use of this information in this publication is provided as is without warranty of any kind, either express or implied,including but not limited to, the implied warranties of merchantability, fitness for a particular purpose and its members disclaim liability for damages of any kind, including any special, indirect, incidental,or consequential damages, including without limitation, lost revenues or lost profits, which may resultfrom the use of this is the responsibility of the user of this document to establish health and safety practices appropriate tothe specific circumstances involved with its use.

4 ACI does not make any representations with regard tohealth and safety issues and the use of this document. The user must determine the applicability of allregulatory limitations before applying the document and must comply with all applicable laws and regulations,including but not limited to, United States Occupational Safety and Health Administration (OSHA) healthand safety information: ACI documents are available in print, by download, on CD-ROM, through electronicsubscription, or reprint and may be obtained by contacting ACI standards and committee reports are gathered together in the annually revised ACI Manual ofConcrete Practice (MCP).

5 American Concrete Institute38800 Country Club DriveFarmington Hills, MI :248-848-3700 305R-10 supersedes ACI 305R-99 and was adopted and published October 2010, American Concrete rights reserved including rights of reproduction and use in any form or by anymeans, including the making of copies by any photo process, or by electronic ormechanical device, printed, written, or oral, or recording for sound or visual reproduc-tion or for use in any knowledge or retrieval system or device, unless permission inwriting is obtained from the copyright proprietors. 1 ACI Committee Reports, Guides, Manuals, and Commentariesare intended for guidance in planning, designing, executing,and inspecting construction.

6 This document is intended for theuse of individuals who are competent to evaluate thesignificance and limitations of its content and recommendationsand who will accept responsibility for the application of thematerial it contains. The American Concrete Institute disclaimsany and all responsibility for the stated principles. The Instituteshall not be liable for any loss or damage arising to this document shall not be made in contractdocuments. If items found in this document are desired by theArchitect/Engineer to be a part of the contract documents, theyshall be restated in mandatory language for incorporation bythe to Hot Weather ConcretingReported by ACI Committee 305 ACI 305R-10 Environmental factors, such as high ambient temperature, low humidity,high wind, or both low humidity and high wind, affect Concrete propertiesand the construction operations of mixing, transporting, and placing of theconcrete materials.

7 This Guide provides measures that can be taken tominimize the undesirable effects of these environmental factors and reducethe potential for serious Guide defines hot Weather , discusses potential problems, and presentspractices intended to minimize them. These practices include selectingmaterials and proportions, precooling ingredients, and batching. Othertopics discussed include length of haul, consideration of Concrete temperatureas placed, facilities for handling Concrete at the site, and, during the earlycuring period, placing and curing techniques, and appropriate testing andinspection procedures in hot Weather materials, processes, quality control measures, and inspectionsdescribed in this document should be tested, monitored, or performed asapplicable only by individuals holding the appropriate ACI certificationsor : air entrainment; cooling; curing ; evaporation.

8 High tempera-ture; hot Weather construction; plastic shrinkage; production methods;retempering; slump tests; water 1 Introduction and scope, p. ScopeChapter 2 Notation and definitions, p. DefinitionsChapter 3 Potential problems and practices, p. Potential problems in hot Potential problems related to other Practices for hot Weather concretingChapter 4 Effects of hot Weather on Concrete properties, p. Estimating evaporation Temperature of Ambient Supplementary cementitious Chemical ProportioningJames M. AldredDarrell F. ElliotFrank A.

9 KozeliskiBruce G. SmithGodwin Q. AmekuediMichael FaubelDarmawan LudirdjaEdward G. SparksPhilip BrandtRichard D. GaynorDavid R. NauBoris Y. SteinD. Gene DanielAntonio J. GuerraDan RavinaLouis R. ValenzuelaKirk K. DeadrickKenneth C. HoverRobert J. RyanJames N. Cornell IIChairG. Terry Harris, TO HOT Weather Concreting (ACI 305R-10) American Concrete Institute Copyrighted Material 5 Production and delivery, p. Temperature control of Batching and Slump Properties of Concrete RetemperingChapter 6 Placing and curing , p. Preparations for placing and Placement and curing and protectionChapter 7 Testing and inspection, p.

10 InspectionChapter 8 References, p. Referenced standards and Cited referencesAppendix A Estimating Concrete temperature,pp. Estimating temperature of freshly mixed Estimating temperature of Concrete with iceAppendix B Methods for cooling fresh Concrete , p. Cooling with chilled mixing Liquid nitrogen cooling of mixing Cooling Concrete with Cooling mixed Concrete with liquid Cooling of coarse aggregatesCHAPTER 1 INTRODUCTION AND IntroductionHot Weather can create problems in mixing, placing, andcuring hydraulic-cement Concrete that adversely affect theproperties and serviceability of the Concrete .


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