1、Designation:C149114Standard Specification forConcrete Roof Pavers1This standard is issued under the fixed designation C1491;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 parentheses indicates t
2、he year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers concrete roof pavers that aremachine-made from hydraulic cement,water,and suitablemineral aggregates with or without the inclusion of othermateri
3、als,for use as roof ballast and protection of roofmembranes.NOTE1The design of roof ballast systems for resisting wind uplift isbeyond the scope of this specification.Building codes and other standardsshould be consulted in designing for wind uplift resistance.1.2 The text of this standard reference
4、s notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall 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 mathematicalconver
5、sions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices an
6、d determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC150 Specification for Portland CementC331 Specification for Ligh
7、tweight Aggregates for ConcreteMasonry UnitsC595 Specification for Blended Hydraulic 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 Cement
8、C1209 Terminology of Concrete Masonry Units and RelatedUnits(Withdrawn 2009)3C1232 Terminology of MasonryC1262 Test Method for Evaluating the Freeze-Thaw Dura-bility of Dry-Cast Segmental Retaining Wall Units andRelated Concrete Units3.Terminology3.1 Terminology defined in Terminology C1209 and Term
9、i-nology C1232 shall apply to this specification.4.Material4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specifications:4.1.1 Portland CementSpecification C150.4.1.2 Modified Portland CementPortland cement con-forming to Specification C150,modified as follows:4.1.2.1 L
10、imestoneLimestone,with a minimum 85%cal-cium carbonate(CaCO3)content,shall be permitted to beadded to the cement,provided the requirements of Specifica-tion C150 are modified as follows:(1)Limitation on Insoluble Residue1.5%.(2)Limitation on Air Content of MortarVolume percent,22%max.(3)Limitation o
11、n Loss on Ignition7%.4.1.3 Blended CementsCement conforming to eitherSpecification C595 or Specification C1157.4.1.4 PozzolansSpecification C618.4.1.5 Blast Furnace SlagSpecification C989.4.2 AggregatesAggregates shall conform to the followingspecifications,except that grading requirements shall not
12、necessarily apply:4.2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightweight AggregatesSpecification C331.4.3 Other ConstituentsAir-entraining agents,coloringpigments,integral water repellents,finely ground silica,and1This specification is under the jurisdiction of ASTM Committee C15 onManufa
13、ctured Masonry Units and is the direct responsibility of SubcommitteeC15.03 on Concrete Masonry Units and Related Units.Current edition approved Dec.1,2014.Published December 2014.Originallyapproved in 2001.Last previous edition approved in 2013 as C1491 13.DOI:10.1520/C1491-14.2For referenced ASTM
14、standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A
15、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 States1 other constituents shall be previously established as suitable foruse in concrete roof pavers and shall conform to applicableAST
16、M standards or shall be shown by test or experiencesatisfactory to the purchaser to be not detrimental to thedurability of the units or any material customarily used inconcrete roof pavers.5.Physical Requirements5.1 At the time of delivery to the work site,the units shallconform to the physical requirements of Table 1 when tested inaccordance with 8.2.5.2 Resistance to Flexural LoadThe average resistance toflexural load for three paver units shall exceed 350 lb(1557 N)and resistance to flexural
