ACI 209.1R-05 PDF

ACI Bazant Jeffrey J. Brooks Ronald G. Jason Weiss Secretary Mario A. Chiorino Marwan A.

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ACI Bazant Jeffrey J. Brooks Ronald G. Jason Weiss Secretary Mario A. Chiorino Marwan A. Daye Walter H. Dilger N. Mueller Lawrence C. Novak Klaus A. Shiu Carlos Videla Domingo J. This guide describes the effects of numerous variables on shrinkage and creep of hardened concrete, including mixture proportions, environment, design, and construction.

This document is aimed at designers who wish to gain further information about factors changing shrinkage and creep but does not include information on the prediction of shrinkage and creep or structural design issues associated with shrinkage and creep.

Keywords: creep; drying shrinkage; strain. Section 1. This document does not include information on the prediction of shrinkage and creep or structural design issues associated with shrinkage and creep. All rights reserved including rights of reproduction and use in any form or by any means, including the making of copies by any photo process, or by electronic or mechanical device, printed, written, or oral, or recording for sound or visual reproduction or for use in any knowledge or retrieval system or device, unless permission in writing is obtained from the copyright proprietors.

This document is intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains. The American Concrete Institute disclaims any and all responsibility for the stated principles.

The Institute shall not be liable for any loss or damage arising therefrom. Reference to this document shall not be made in contract documents. This document also provides references that provide direction for those wishing to seek additional information about shrinkage and creep. Total strain;? Autogenous shrinkage;? Drying shrinkage;? Carbonation shrinkage;? Load-induced strain;? Initial strain at loading or nominal elastic strain;? Creep strain;? Basic creep;? Drying creep;? Specific creep; and?

Creep coefficient. Various terms are shown in Fig. The values of total strain, shrinkage, and creep are time-dependent. Shrinkage and creep may occur in three dimensions; however, most research suggests that total strain, shrinkage, and creep occur in each dimension independently. Thus, changes in length will be consistently used throughout this document, rather than changes in volume. As shown in Fig. Shrinkage does not include changes in length due to temperature variations, but depends on the environment and on the configuration and size of the specimen.

Shrinkage strain is usually measured by casting companion load-free specimens identical to the loaded concrete specimens used to measure the total strain. These companion specimens are cast from the same concrete batch, have the same dimensions, and are stored in the same environment as the loaded concrete specimens. Cement paste Fig. The figure shows that the concrete undergoes autogenous shrinkage before drying.

Once drying commences at time t0, drying shrinkage occurs. Upon loading, both drying and basic creep occurs in the drying specimen.

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ACI 209.1R-05 - Report on Factors Affecting Shrinkage and Creep of Hardened Concrete

These companion specimens are cast from the same concrete batch, have the same dimensions, and are stored in the same environment as the loaded concrete specimens. Get fast, free shipping with Amazon Prime. Upon loading, both drying and basic creep occurs in the drying specimen. Would you like to tell us about a lower price? Amazon Second Chance Pass it on, trade it in, give it a second life. Reference to this document shall not be made in contract documents. This document also provides references that provide

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