1、Designation:C137217Standard Specification forDry-Cast Segmental Retaining Wall Units1This standard is issued under the fixed designation C1372;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in pare
2、ntheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers dry-cast segmental retainingwall units of concrete,machinemade from hydraulic cement,water,and suitable mineral aggregates wit
3、h or without theinclusion of other materials.The units are intended for use inthe construction of mortarless segmental retaining walls.NOTE1When particular features are desired,such as densityclassification,higher compressive strength,surface texture,finish,color,or other special features,such prope
4、rties should be specified separately bythe purchaser.Suppliers should be consulted as to availability of unitshaving the desired features.1.2 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shal
5、l not be consideredas requirements of the standard.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This international standard was
6、 developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Do
7、cuments2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC150 Specification for Portland CementC331 Specification for Lightweight Aggregates for ConcreteMasonry UnitsC595 Specification for Blended Hydraulic
8、CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC989 Specification for Slag Cement for Use in Concrete andMortarsC1157 Performance Specification for Hydraulic CementC1232 Terminology for MasonryC1262 Test Method for Evaluating the Freeze-Thaw Dura-bi
9、lity of Dry-Cast Segmental Retaining Wall Units andRelated Concrete Units3.Terminology3.1 Terminology defined in Terminology C1232 shall applyfor this specification.3.2 Definitions:3.2.1 Dry-cast,adjmanufacturing concrete products usinglow frequency,high amplitude vibration to consolidate con-crete
10、of stiff or extremely dry consistency in a form.3.2.2 segmental retaining wall unit,nunit manufacturedof concrete for the construction of dry-stacked earth retainingwalls.3.2.3 segmental retaining wall unit,dry-cast,na segmen-tal retaining wall unit manufactured of concrete using adry-cast process.4
11、.Materials4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specifications:4.1.1 Portland CementsSpecification C150.4.1.2 Modified Portland CementPortland cement con-forming to Specification C150,modified as follows:4.1.2.1 LimestoneLimestone,with a minimum 85%Cal-cium Car
12、bonate(CaCO3)content,shall be permitted to beadded to the cement,provided these requirements of Specifi-cation C150 as modified are met:(1)Limitation on Insoluble Residue1.5%.(2)Limitation on Air Content of MortarVolume percent,22%max.(3)Limitation on Loss of Ignition7%.4.1.3 Blended Hydraulic Cemen
13、tsSpecification C595.4.1.4 Hydraulic CementSpecification C1157.4.1.5 PozzolansSpecification C618.4.1.6 Blast Furnace Slag CementSpecification C989.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of C15.03 on ConcreteMa
14、sonry Units and Related Units.Current edition approved Aug.1,2017.Published August 2017.Originallyapproved in 1997.Last previous edition approved in 2016 as C1372 16.DOI:10.1520/C1372-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm
15、.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis i
16、nternational standard was developed in accordance with internationally recognized principles on standardization 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 4.2 AggregatesAggregates shall conform to the followingspecifications,except that grading requirements shall notnecessarily apply:4.2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightw
