1、Designation:C114295(Reapproved 2013)Standard Specification forExtended Life Mortar for Unit Masonry1This standard is issued under the fixed designation C1142;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers extended life mortar as deliv-ered for use in construction of non-reinforced or reinforced unitmasonry.1.2 This
3、specification is a property standard.1.3 Four types of mortar are covered:RM,RS,RN,and RO.These types of mortar can be manufactured by using one of thefour mortar formulations with masonry aggregate:portlandcement,portland cement-lime,masonry cement,or masonrycement with portland cements.The materia
4、ls are listed inSection 5.1.4 Appendix X1 provides a rationale statement and com-mentary.2.Referenced Documents2.1 ASTM Standards:2C91 Specification for Masonry CementC144 Specification for Aggregate for Masonry MortarC150 Specification for Portland CementC207 Specification for Hydrated Lime for Mas
5、onry Pur-posesC270 Specification for Mortar for Unit MasonryC780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonryC1072 Test Methods for Measurement of Masonry FlexuralBond StrengthE447 Test Method for Compressive Strength of LaboratoryConstru
6、cted Masonry Prisms(Withdrawn 1997)3E518 Test Methods for Flexural Bond Strength of Masonry2.2 Other Document:National Institute of Standards and Technology,Handbook44,Specifications,Tolerances,and Other Technical Re-quirements for Commercial Weighing and MeasuringDevices43.Terminology3.1 Definition
7、s of Terms Specific to This Standard:3.1.1 All terms in this specification have their conventionalmeaning,except as follows:3.1.2 extended life mortarsmortar consisting of cementi-tious materials,aggregate,water and set-control admixtureswhich are measured and mixed at a central location,usingweight
8、-or-volume-control equipment.This mortar,as deliveredto a construction site,shall be usable for a period in excess of212h.4.Ordering Information4.1 The purchaser shall specify the following:4.1.1 The mortar type in Table 1,4.1.2 Length of workability time for the mortar,and4.1.3 Desired consistency
9、satisfactory for the masons usewhen tested by the manufacturer in accordance with 10.2.4.2 At the request of the purchaser,the producer shall,priorto delivery,furnish laboratory and field performance datasatisfactory to the purchaser that the materials to be used willproduce mortar of the type speci
10、fied.NOTE1The purchase order or contract may list the mortar ingredientsdesired and may state a list of optional data,which are in addition to theperformance requirements in Section 7.Examples of such tests are:TestMethod C1072,Test Methods E518,Test Methods E447,and test data formortar that has bee
11、n re-tempered.5.Materials5.1 Materials used as ingredients in extended life mortarshall conform to the requirements specified in 5.1.1 through5.1.4.2.5.1.1 Cementitious MaterialsCementitious materials shallconform to the following ASTM specifications.5.1.1.1 Portland CementTypes I,II or III of Speci
12、ficationC150.1This specification is under the jurisdiction of ASTM Committee C12 onMortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-mittee C12.03 on Specifications for Mortars.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1990.Last previ
13、ous edition approved in 2007 as C1142 95(2007).DOI:10.1520/C1142-95R13.2For referenced ASTM 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 web
14、site.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Superintendent of Documents,U.S.Government PrintingOffice,Washington,DC 20402.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.1.2
15、 Masonry CementTypes M,S,or N of SpecificationC91.5.1.1.3 Hydrated LimeSpecification C207,Type S.NOTE2Type N limes may be permitted if shown by test orperformance record to be not detrimental by the autoclave expansion.5.1.2 AggregatesThe aggregate shall comply with Speci-fication C144.5.1.3 WaterWa
16、ter shall be clean and free of oils,acids,alkalies,salts,organic materials or other substances that maybe deleterious to mortar or corrosive to metals in the masonry.5.1.4 AdmixturesAdmixtures are permitted for use only atthe production plant.5.1.4.1 Evidence satisfactory to the purchaser shall beprovided to show that the admixtures do not cause noraccelerate corrosion of metal which will be in contact withmortar.5.1.4.2 Any admixture to be used shall be subject to writtencertification from the
