1、Designation:C1776/C1776M17Standard Specification forWet-Cast Precast Modular Retaining Wall Units1This standard is issued under the fixed designation C1776/C1776M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revis
2、ion.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers wet-cast precast modular re-taining wall units cast from first-purpose concrete with orwithout the inclusio
3、n of steel reinforcement.The precast unitscovered by this specification are machine-placed units intendedfor use in the construction of dry stacked modular retainingwall systems.1.2 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(ex
4、cluding those in tables and figures)shall not be consideredas requirements of the standard.1.3 UnitsThe values stated in either inch-pound units orSI units are to be regarded separately as standard.Within thetext of the specification,the SI units are shown in brackets.Thevalues stated in each system
5、 are not exact equivalents.Therefore,each system shall be used independently of theother.Combining values from the two systems may result innon-conformance with the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility
6、 of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA706/A706M
7、 Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete ReinforcementA767/A767M Specification for Zinc-Coated(Galvanized)Steel Bars for Concrete ReinforcementA775/A775M Specification for Epoxy-Coated Steel Rein-forcing BarsA884/A884M Specification for Epoxy-Coated Steel Wireand Welde
8、d Wire ReinforcementA934/A934M Specification for Epoxy-Coated PrefabricatedSteel Reinforcing BarsA1055/A1055M Specification for Zinc and Epoxy DualCoated Steel Reinforcing BarsA1060/A1060M Specification for Zinc-Coated(Galvanized)Steel Welded Wire Reinforcement,Plain and Deformed,for ConcreteA1064/A
9、1064M Specification for Carbon-Steel Wire andWelded Wire Reinforcement,Plain and Deformed,forConcreteC31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC33/C33M Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete Specime
10、nsC94/C94M Specification for Ready-Mixed ConcreteC125 Terminology Relating to Concrete and Concrete Ag-gregatesC138/C138M Test Method for Density(Unit Weight),Yield,and Air Content(Gravimetric)of ConcreteC143/C143M Test Method for Slump of Hydraulic-CementConcreteC150/C150M Specification for Portlan
11、d CementC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC231/C231M Test Method forAir Content of Freshly MixedConcrete by the Pressure MethodC260/C260M Specification for Air-Entra
12、ining Admixturesfor ConcreteC494/C494M Specification for Chemical Admixtures forConcreteC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC666/C666M Test Method for Resistance of Concrete toRapid Freezing
13、and ThawingC823/C823M Practice for Examination and Sampling ofHardened Concrete in ConstructionsC979/C979M Specification for Pigments for Integrally Col-ored Concrete1This test method is under the jurisdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subc
14、ommittee C27.20 onArchitectural and Structural Products.Current edition approved Feb.1,2017.Published February 2017.DOI:10.1520/C1776_C1776M-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volum
15、e information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardizat
16、ion established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 C989/C989M Specification for Slag Cement for Use inConcrete and MortarsC1157/C1157M Performance Specification for HydraulicCementC1611/C1611M Test Method for Slump Flow of Self-Consolidating Concrete2.2 ACI Documents:3ACI 318 Building Code Requirements for Structural Con-crete and Commentary3.Term