Specifications for Structural Concrete

1 ACI 301M-05 supersedes ACI 301M-99 and became effective October 17, 2005, 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 reproductionor for use in any knowledge or retrieval system or device, unless permission in writingis obtained from the copyright proprietors. 301M-1 Specifications for Structural ConcreteAn ACI StandardReported by ACI Committee 301 ACI 301M-05 This specification is a Reference specification that the Engineer or Archi-tect can make applicable to any construction project by citing it in theProject Specifications .

2 The Architect/Engineer supplements the provisionsof this Reference specification as needed by designating or specifying indi-vidual project document covers materials and proportioning of Concrete ; reinforc-ing and prestressing steels; production, placing, finishing, and curing ofconcrete; and formwork design and construction. Methods of treatment ofjoints and embedded items, repair of surface defects, and finishing offormed and unformed surfaces are specified. Separate sections are devotedto architectural Concrete , lightweight Concrete , mass Concrete , prestressedconcrete, and shrinkage-compensating Concrete .

3 Provisions governing test-ing, evaluation, and acceptance of Concrete as well as acceptance of thestructures are : admixture; aggregate; air entrainment; architectural Concrete ;cement; cementitious materials; cold weather; compressive strength; Concrete ; Concrete construction; Concrete durability; Concrete slab; consoli-dation; 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 ; rein-forcement; repair; reshoring; shoring; shrinkage-compensating Concrete ; specification ; subgrade; temperature; test; tolerance; water-cementitiousmaterial ratio; welded wire B.

4 ArdahlMarwan A. DayeClifford Gordon David K. MaxwellDomingo J. Carreira*Mario R. DiazDavid P. Gustafson*Timothy L. MooreOleh B. CiukJames A. Farny*Jerry A. HollandJerry ParnesSteven R. Close*W. Bryant FryeRoy H. Keck*Aimee PergalskyD. Gene DanielRichard D. GaynorJames A. LeeJames M. Shilstone, Subcommittee MembersJames E. AndersonGene HightowerG. Michael RobinsonDaniel J. StanleyRamon L. CarrasquilloNarendra V. JadhavEdward D. RussellBruce A. SuprenantPaul A. DeckerMichael L. LemingMehmet A. SameeRobert L. TeermanDan Ellery William M. KlormanW. Thomas ScottMichael A. WhisonantAlphonse E. EngelmanMark A. PayneWilliam C. ShermanMichelle L.

5 WilsonThomas M. GreeneKenneth B. RearDouglas J. SordylRichard M. WingConsulting MembersJeffrey W. ColemanGilbert J. HaddadRoss S. MartinJoseph A. McElroySteven H. GeblerAtilano LamanaBryant Mather Carlos VidelaW. Calvin McCallChairColin L. LoboSecretary*Subcommittee chair. TO SPECIFIERThis specification is incorporated by reference in theproject Specifications using the wording in P3 of the prefaceand including the information from the mandatory, optional,and submittal checklists following the ACI specification 301M is intended to be used byreference or incorporation in its entirety in the Project Spec-ification.

6 Do not copy individual Parts, Sections, Articles, orParagraphs into the Project specification , because takingthem out of context may change their If Sections or Parts of ACI specification 301M arecopied into the Project specification or any other document,301M-2 ACI STANDARDdo not refer to them as an ACI specification , because thespecification has been A statement such as the following will serve to makeACI specification 301M a part of the Project specification : Work on (Project Title) shall conform to all requirementsof ACI 301M-05 published by the American Concrete Insti-tute, Farmington Hills, Michigan, except as modified bythese Contract Documents.

7 P4. Each technical Section of ACI specification 301M iswritten in the three-part Section format of the ConstructionSpecifications Institute, as adapted for ACI language is imperative and The specification is written to the Contractor. When aprovision of this specification requires action on theContractor s part, the verb shall is used. If the Contractoris allowed to exercise an option, the verb may or, whenlimited alternatives are available, the conjunctive phrase shall is used. Statements provided in the spec-ification as information to the contractor use the verbs may or will.

8 Informational statements typically identify activi-ties or options that will be taken or may be taken by theOwner or the , p. 301M-1 specification :Section 1 General requirements, p. Work Work not Reference standards and cited Reference Cited Field Standards-producing Testing agency Quality Testing Testing responsibilities of Testing responsibilities of Owner s testing Tests on hardened Concrete Evaluation of Concrete strength Acceptance of Concrete Field acceptance of Acceptance of Dimensional Strength of Protection of in-place Loading and support of Protection from mechanical injurySection 2 Formwork and formwork accessories, p.

9 Performance and design Fabrication and Construction and erection of Removal of Reshoring and Strength of Concrete required for removal offormworkSection 3 Reinforcement and reinforcement supports, p. Submittals, data, and Materials delivery, storage, and PlacementSection 4 Concrete mixtures, p. Quality Materials storage and Performance and design Measuring, batching, and DeliverySection 5 Handling, placing, and constructing,p. Delivery, storage, and Performance and design Placement of Finishing formed Finishing unformed Sawed contraction Curing and Repair of surface defectsSPECIFICATIONS FOR Structural CONCRETE301M-3 Section 6 Architectural Concrete , p.

10 Quality Product delivery, storage, and Project Performance and design Proportioning Concrete Formwork Formwork Repair of tie holes and surface FinishingSection 7 Lightweight Concrete , p. Product delivery, storage, and Performance and design Batching and Field quality controlSection 8 Mass Concrete , p. Performance and design Curing and protectionSection 9 Prestressed Concrete , p. Quality Product delivery, handling, and Proportioning of Concrete and grout TensioningSection 10 Shrinkage-compensating Concrete ,p. General Performance and design Isolation-joint filler Isolation CuringNOTES TO SPECIFIER:Foreword to checklists, p.