ACI 301-20 (IN-LB)

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ACI 301-20

Specications for Concrete

Construction (ACI301-20)

Reported by ACI Committee 301

An ACI Standard

Inch-Pound Units

IN-LB

First Printing

September 2020

ISBN: 978-1-64195-107-4

Specications for Concrete Construction

may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, lm, or other

distribution and storage media, without the written consent of ACI.

The technical committees responsible for ACI committee reports and standards strive to avoid

ambiguities, omissions, and errors in these documents. In spite of these efforts, the users of ACI

documents occasionally nd information or requirements that may be subject to more than one

interpretation or may be incomplete or incorrect. Users who have suggestions for the improvement of

ACI documents are requested to contact ACI via the errata website at http://concrete.org/Publications/

DocumentErrata.aspx. Proper use of this document includes periodically checking for errata for the most

up-to-date revisions.

ACI committee documents are intended for the use of individuals who are competent to evaluate the

signicance and limitations of its content and recommendations and who will accept responsibility for

the application of the material it contains. Individuals who use this publication in any way assume all

risk and accept total responsibility for the application and use of this information.

All 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, tness for a particular

purpose or non-infringement.

ACI 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 prots, which may result

from the use of this publication.

It is the responsibility of the user of this document to establish health and safety practices appropriate

to the specic circumstances involved with its use. ACI does not make any representations with regard

to health and safety issues and the use of this document. The user must determine the applicability of

all regulatory 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) health and safety standards.

Participation by governmental representatives in the work of the American Concrete Institute and in

the development of Institute standards does not constitute governmental endorsement of ACI or the

standards that it develops.

Order information: ACI documents are available in print, by download, through electronic subscription,

or reprint, and may be obtained by contacting ACI.

ACI codes, specications, and practices are made available in the ACI Collection of Concrete Codes,

Specications, and Practices. The online subscription to the ACI Collection is always updated, and

includes current and historical versions of ACI’s codes and specications (in both inch-pound and SI

units) plus new titles as they are published. The ACI Collection is also available as an eight-volume set of

books and a USB drive.

American Concrete Institute

38800 Country Club Drive

Farmington Hills, MI 48331

Phone: +1.248.848.3700

Fax: +1.248.848.3701

www.concrete.org

ACI 301-20 supersedes ACI 301-16, was adopted August 31, 2020, and published

September 2020.

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 is a Reference Specication that the Architect/Engineer can

apply to projects involving concrete construction by citing it in the

Project Specication. A mandatory requirements checklist and an

optional requirements checklist are provided to assist the Architect/

Engineer in supplementing the provisions of this Specication as

required or needed by designating or specifying individual project

requirements.

The rst ve sections of this Specication cover general require-

ments for concrete construction. These sections cover materials

and proportioning of concrete; reinforcement and prestressing

steel; production, placing, nishing, and curing of concrete;

formwork performance criteria and construction; treatment of

joints; embedded items; repair of surface defects; and nishing

of formed and unformed surfaces. Provisions governing testing,

evaluation, and acceptance of concrete as well as acceptance of

the structures are included. The remaining sections are devoted to

architectural concrete, lightweight concrete, mass concrete, post-

tensioned concrete, shrinkage-compensating concrete for interior

slabs, industrial oor slabs, tilt-up construction, precast structural

concrete, and precast architectural concrete.

The materials, processes, quality control measures, and inspec-

tions described in this document should be tested, monitored, or

performed as applicable only by individuals holding the appro-

priate ACI Certication or equivalent.

Keywords: architectural concrete; cold weather; compressive strength;

consolidation; curing; durability; nish; formwork; grouting; hot weather;

industrial oors; inspection; joints; lightweight concrete; mass concrete;

mixture proportions; placing; post-tensioned concrete; precast concrete;

prestressing steel; repair; reshoring; shoring; shrinkage-compensating

concrete; slabs-on-ground; steel reinforcement; testing; tilt-up; tolerance;

welded wire reinforcement.

ACI 301-20

Specications for Concrete Construction

An ACI Standard

Reported by ACI Committee 301

Michelle L. Wilson, Chair Jason P. Bray, Secretary

VOTING MEMBERS

Roger J. Becker*

Nicholas J. Carino

Domingo J. Carreira

Mark F. Chrzanowski

Teck L. Chua

James N. Cornell

Anthony R. DeCarlo Jr.*

Thano Drimalas

Christopher C. Ferraro

John W. Gajda*

Thomas M. Greene

Kenneth S. Harmon*

John L. Hausfeld*

Kenneth C. Hover

Steven C. Jaycox

Eric P. Koehler*

Larry B. Krauser

Colin L. Lobo

Ward R. Malisch

Frank Stephen Malits

David R. Nau

Theodore L. Ne*

Aimee Pergalsky

Eric S. Peterson

Henry B. Prenger*

Amy M. Reineke Trygestad

David B. Scott

George W. Seegebrecht

Matthew J. Sheehan

Kuntay K. Talay

Scott M. Tarr*

David G. Tepke

Daniel B. Toon*

John B. Turner*

Kevin D. Wolf

*Subcommittee Chairs

SUBCOMMITTEE MEMBERS

Oscar R. Antommattei

Asit N. Baxi

Eric Carleton

Steven J. Crawford

Ufuk Dilek

Daniel P. Dorfmueller

Rick Felder

Chris A. Forster

Charles S. Hanskat

Todd R. Hawkinson

Roger S. Johnston†

Phil Jones

Neel R. Khosa

Donald P. Kline

Ronald L. Kozikowski Jr.

Andrew R. Lloyd

Andrew S. McPherson

Todd R. Messerly

Yvonne Nelson

Joseph F. Neuber Jr.

Lance Osborne

Karen Polanco

Jonathon L. Poole

Christopher James Perry

Karen Polanco

John P. Ries

G. Michael Robinson

John W. Rohrer

Paul A. Rouis III

Steven K. Rowe

Edith G. Smith

Jason A. Swagert

Ralph H. Tulis

Miroslav Vejvoda

Gregory R. Wagner

David Wan

Michael A. Whisonant

Dennis M. Wittry

William H. Wolfe

Zuming Xia

CONSULTING MEMBERS

Jon B. Ardahl Sidney Freedman David P. Gustafson W. Calvin McCall

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摘要：

ACI 301-20 (IN-LB) 是由美国混凝土协会发布的最新版混凝土结构施工标准规范，采用英制（英寸-磅）单位制，适用于北美及其他使用英制单位的工程项目。该规范全面涵盖了混凝土材料、配比、施工、养护、检验及验收等关键环节，为设计师、承包商和监理人员提供了统一的施工技术要求与质量控制依据。相较于旧版，ACI 301-20 更新了材料性能指标、施工工艺要求及现场检测方法，强调了耐久性与可持续性设计，是确保混凝土结构安全、可靠与长期性能的重要参考文件。

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