Specifications For Structural Concrete

ACI 301-05 supersedes ACI 301-99 and became effective April 20, 2005.

Copyright © 2005, American Concrete Institute.

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

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or for use in any knowledge or retrieval system or device, unless permission in

writing is obtained from the copyright proprietors.

301-1

Specifications for Structural Concrete

An ACI Standard

Reported by ACI Committee 301

ACI 301-05

This specification is a Reference Specification that the Engineer or Architect

can make applicable to any construction project by citing it in the

Project Specifications. The Architect/Engineer supplements the provisions

of this Reference Specification as needed by designating or specifying individual

project requirements.

The document covers materials and proportioning of concrete; reinforcing

and prestressing steels; production, placing, finishing, and curing of

concrete; and formwork design and construction. Methods of treatment of

joints and embedded items, repair of surface defects, and finishing of

formed and unformed surfaces are specified. Separate sections are devoted

to architectural concrete, lightweight concrete, mass concrete, prestressed

concrete, and shrinkage-compensating concrete. Provisions governing testing,

evaluation, and acceptance of concrete as well as acceptance of the

structures are included.

Keywords: admixture; aggregate; air entrainment; architectural concrete;

cement; cementitious materials; cold weather; compressive strength;

concrete; concrete construction; concrete durability; concrete slab; consolidation;

conveyor; curing; density; exposed-aggregate finish; finish; floors;

formwork; grout; grouting; hot-weather; inspection; joint (construction,

contraction, and isolation); lightweight concrete; mix; mixture proportion;

placing; prestressed concrete; prestressing steel; reinforced concrete; reinforcement;

repair; reshoring; shoring; shrinkage-compensating concrete;

specification; subgrade; temperature; test; tolerance; water-cementitious

material ratio; welded wire reinforcement.

Jon B. Ardahl Marwan A. Daye Clifford Gordon† David K. Maxwell

Domingo J. Carreira* Mario R. Diaz David P. Gustafson* Timothy L. Moore

Oleh B. Ciuk James A. Farny* Jerry A. Holland Jerry Parnes

Steven R. Close* W. Bryant Frye Roy H. Keck* Aimee Pergalsky

D. Gene Daniel Richard D. Gaynor James A. Lee James M. Shilstone, Sr.

Voting Subcommittee Members

James E. Anderson Gene Hightower G. Michael Robinson Daniel J. Stanley

Ramon L. Carrasquillo Narendra V. Jadhav Edward D. Russell Bruce A. Suprenant

Paul A. Decker Michael L. Leming Mehmet A. Samee Robert L. Teerman

Dan Ellery† William M. Klorman W. Thomas Scott Michael A. Whisonant

Alphonse E. Engelman Mark A. Payne William C. Sherman Michelle L. Wilson

Thomas M. Greene Kenneth B. Rear Douglas J. Sordyl Richard M. Wing

Consulting Members

Jeffrey W. Coleman Gilbert J. Haddad Ross S. Martin Joseph A. McElroy

Steven H. Gebler Atilano Lamana Bryant Mather† Carlos Videla

W. Calvin McCall

Chair

Colin L. Lobo

Secretary

*Subcommittee chair.

†Deceased.

NOTES TO SPECIFIER

This specification is incorporated by reference in the

project specifications using the wording in P3 of the preface

and including the information from the mandatory, optional,

and submittal checklists following the specification.

PREFACE

P1. ACI Specification 301 is intended to be used by reference

or incorporation in its entirety in the Project Specification.

Do not copy individual Parts, Sections, Articles, or

Paragraphs into the Project Specification, because taking

them out of context may change their meaning.

P2. If Sections or Parts of ACI Specification 301 are

copied into the Project Specification or any other document,

301-2 ACI STANDARD

do not refer to them as an ACI Specification, because the

specification has been altered.

P3. A statement such as the following will serve to make

ACI Specification 301 a part of the Project Specification:

“Work on (Project Title) shall conform to all requirements

of ACI 301-05 published by the American Concrete Institute,

Farmington Hills, Michigan, except as modified by

these Contract Documents.”

P4. Each technical Section of ACI Specification 301 is

written in the three-part Section format of the Construction

Specifications Institute, as adapted for ACI requirements.

The language is imperative and terse.

P5. The Specification is written to the Contractor. When a

provision of this specification requires action on the

Contractor’s part, the verb “shall” is used. If the Contractor

is allowed to exercise an option, the verb “may” or, when

limited alternatives are available, the conjunctive phrase

“shall either... or...” is used. Statements provided in the specification

as information to the contractor use the verbs “may”

or “will.” Informational statements typically identify activities

or options that “will” be taken or “may” be taken by the

Owner or the Architect/Engineer.

CONTENTS

Preface, p. 301-1

SPECIFICATION:

Section 1—General requirements, p. 301-3

1.1—Scope

1.1.1— Work specified

1.1.2— Work not specified

1.2—Definitions

1.3—Reference standards and cited publications

1.3.1—Reference standards

1.3.2—Cited publications

1.3.3—Field references

1.4—Standards-producing organizations

1.5—Submittals

1.5.1—General

1.5.2—Testing agency reports

1.6—Quality assurance

1.6.1—General

1.6.2—Testing agencies

1.6.3—Testing responsibilities of Contractor

1.6.4—Testing responsibilities of Owner’s testing agency

1.6.5—Tests on hardened concrete in-place

1.6.6—Evaluation of concrete strength tests

1.6.7—Acceptance of concrete strength

1.6.8—Field acceptance of concrete

1.7—Acceptance of structure

...