1、Designation:C172211Standard Guide forRepair and Restoration of Dimension Stone1This standard is issued under the fixed designation C1722;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 parenthese
2、s indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide describes materials and procedures for re-storing facades constructed of or finished with dimensionstone.All of the materials,procedures,and princip
3、les aresuitable for restoration of historic and nonhistosric structures.1.2 This guide is not intended to address restoration ofinterior dimension stone,although many of the materials andprocedures may be suitable for interior use.1.3 The values stated in inch-pound units are to be regardedas standa
4、rd.The values given in parentheses are mathematicalconversions 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
5、 to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2C5 Specification for Quicklime for Structural PurposesC10 Specification for Natural CementC91 Specification for Masonry CementC119
6、 Terminology Relating to Dimension StoneC141 Specification for Hydraulic Hydrated Lime for Struc-tural PurposesC150 Specification for Portland CementC207 Specification for Hydrated Lime for Masonry Pur-posesC270 Specification for Mortar for Unit MasonryC1180 Terminology of Mortar and Grout for Unit
7、MasonryC1242 Guide for Selection,Design,and Installation ofDimension Stone Attachment SystemsC1324 Test Method for Examination and Analysis of Hard-ened Masonry MortarC1329 Specification for Mortar CementC1489 Specification for Lime Putty for Structural PurposesC1515 Guide for Cleaning of Exterior D
8、imension Stone,Vertical And Horizontal Surfaces,New or ExistingC1521 Practice for Evaluating Adhesion of Installed Weath-erproofing Sealant Joints2.2 OSHA Directive:STD 1-12.026 Abrasive Operations Using Cut Off Wheelsand Masonry Saws3.Terminology3.1 DefinitionsFor definitions of terms used in this
9、guide,other than those listed below,refer to Terminology C119 andTerminology C1180.3.2 Definitions of Terms Specific to This Standard:3.2.1 defectnaturally occuring flaw in the stone.3.2.2 dimension stone restoration consultantone who isknowledgeable and experienced with the care,restoration,andrepa
10、ir of building dimension stone.3.2.3 distresslocalized damage of stone units such ascracks,chips,holes,deterioration,bowing,and projections thathave been broken off or worn down caused by wear,erosion,settlement,displacement,or other adverse chemical or me-chanical actions.3.2.4 dutchman repaira sto
11、ne repair method whereby aportion of a stone unit is cut out and replaced with anotherpiece of stone(called a dutchman).The dutchman is usuallyrectangular or square in shape,but may also be rounded,and isusually at a corner or edge of the stone unit.3.2.5 pointingplacing mortar in the outer portion
12、of thejoints between stone units.To point stone joints,the outerportion of the joints must either be left open during installationor cut or ground out,i.e.have the mortar removed from theouter portion of the joint.New mortar is then pressed into thejoint with a pointing tool.The increased compaction
13、 of the newmortar provides an improved resistance to water penetration atthe joint compared to the primary stone setting mortar.3.2.5.1 repointingthe removal of existing mortar from theouter portion of the joints between stone units and thesubsequent pointing of the joints.1This guide is under the j
14、urisdiction of ASTM Committee C18 on DimensionStone and is the direct responsibility of Subcommittee C18.07 on EnvironmentalProperties,Behavior,and Cleaning.Current edition approved Oct.1,2011.Published November 2011.DOI:10.1520/C1722-11.2For referenced ASTM standards,visit the ASTM website,www.astm
15、.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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.5.2 tuck point
16、ing(tuckpointing,tuck-pointing)thisterm is intentionally not used in this standard,because it isoften used inconsistently.It is variously used to meanrepointing,simply pointing,or applying a raised bead of mortar(often of a different color)down the middle of mortar joints.3.2.6 proprietary repair mortaran exclusively manufac-tured product formulated from cementitious compounds,fineaggregates,mineral pigments,possibly bonding agents,andother additives.It is used for filling cracks,holes,and other
