1、Designation:C179015Standard Specification forFly Ash Facing Brick1This standard is issued under the fixed designation C1790;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 fly ash brick intended for usein masonry,which are made from fly ash,water,and suitablemineral aggregates with or without the inclusion of otherm
3、aterials,and without the use of portland cement.Thisspecification covers units intended for use in masonry,in bothstructural and facing applications.1.2 Units covered under this specification include a fly ashbinder that undergoes hydraulic,pozzolanic,alkali-activated,or geopolymer reactions,or any
4、combination thereof.Thesechemical reactions,in conjunction with the other materials inthe units,provide the strength and durability necessary to meetthe requirements of this specification.NOTE1This specification addresses properties of units formed usingfly ash,aggregates,and other allowed binders.A
5、lthough not required bythis standard,users may request tests that establish assembly performancesuch as unit-mortar bond and fire resistance.1.3 This specification references notes and footnotes,whichprovide explanatory material.These notes and footnotes(ex-cluding those in tables and figures)shall
6、not be considered asrequirements of the standard.1.4 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is therespons
7、ibility 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:C33 Specification for Concrete AggregatesC140 Test Methods for Sampling and Testing ConcreteMaso
8、nry Units and Related UnitsC331 Specification for Lightweight Aggregates for ConcreteMasonry UnitsC426 Test Method for Linear Drying Shrinkage of ConcreteMasonry UnitsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC979 Specification for Pigments for Integr
9、ally Colored Con-creteC989 Specification for Slag Cement for Use in Concrete andMortarsC1232 Terminology of MasonryC1240 Specification for Silica Fume Used in CementitiousMixturesC1645 Test Method for Freeze-thaw and De-icing SaltDurability of Solid Concrete Interlocking Paving Units3.Terminology3.1
10、 Terms defined in Terminology C1232 shall apply for thisspecification.3.2 Definitions of Terms Specific to This Standard:3.2.1 fly ash brick,na masonry unit made from fly ash,water,and suitable aggregates with or without the inclusion ofother materials and specifically without the inclusion of port-
11、land cement.4.Materials4.1 Cementitious MaterialsNo portland cement shall beused.Materials shall conform to the following applicablespecifications:4.1.1 PozzolansSpecification C618.4.1.2 Slag CementSpecification C989.4.1.3 Silica FumeSpecification C1240.4.2 AggregatesAggregates shall conform to the
12、followingspecifications,except that grading requirements shall notnecessarily apply:4.2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightweight AggregatesSpecification C331.4.3 PigmentsforIntegrallyColoredConcreteSpecification C979.4.4 Other ConstituentsOther constituent materials shall beprev
13、iously established as suitable for use in fly ash units andshall conform to applicableASTM standards or shall be shownby test or experience not to be detrimental to the durability ofthe fly ash units or any material customarily used in masonryconstruction.1This test method is under the jurisdiction
14、of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.03 on Concrete Masonry Units and Related Units.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 2014.Last previous edition approved in 2014 as C1790 14a.DOI:10.1520/C1
15、790-15.*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 States1 5.Physical Properties5.1 Physical RequirementsAt the time of delivery to thepurchaser,units shall conform to the physi
16、cal requirementsprescribed in Table 1.All units shall be sound and free ofcracks or other defects that interfere with the proper placementof the units or significantly impair the strength or permanenceof the construction.Minor cracks incidental to the usualmethod of manufacture or minor chipping resulting fromcustomary methods of handling in shipment and delivery arenot grounds for rejection.5.2 StrengthWhen bricks are required having strengthsgreater than prescribed by this specification,the pu