ASTM C1780-2018a Standard Practice for Installation Methods for Adhered Manufactured Stone Masonry Veneer.pdf

1、Designation: C1780 18aStandard Practice forInstallation Methods for Adhered Manufactured StoneMasonry Veneer1This standard is issued under the fixed designation C1780; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las

2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice is intended to provide accepted proceduresto designers and installers of adhered manufactured stonemasonry

3、 veneer in residential and commercial construction.This information is meant to complement the specific installa-tion instructions provided by manufacturers of adhered manu-factured stone masonry veneers and recognized building codes,but is not meant to replace them. This practice does not addressin

4、stallation methods or techniques for all materials in thebuilding envelope. This practice covers the installation ofadhered manufactured stone masonry veneer units for applica-tion as adhered veneer to exterior and interior walls, columns,landscape structures and other structures suitable to receive

5、adhered veneer. The units included in this practice are manu-factured to meet the requirements of Specification C1670/C1670M. This practice is limited to the installation of units.This practice does not cover all flashing or moisture manage-ment requirements. Refer to the applicable building code an

6、dproject documents for additional flashing and moisture man-agement requirements.NOTE 1The Masonry Veneer Manufacturers Association (MVMA)publication Installation Guide for Adhered Concrete Masonry Veneerprovides generally accepted methods and details for installation andflashing.1.2 The values stat

7、ed 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.1.3 All workmanship and materials related to the installa-tion of adhered manufactured stone masonry ven

8、eer units shallmeet the requirements of the contract documents and buildingcode having jurisdiction over the project.1.4 The text of this standard references notes and footnotesthat provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered

9、as requirements of the standard.1.5 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, health, and environmental practices and deter-mine the applicability of reg

10、ulatory limitations prior to use.(WarningFresh hydraulic cementitious mixtures are causticand may cause chemical burns to skin and tissue uponprolonged exposure.2)1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established i

11、n 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 Documents2.1 ASTM Standards:3C90 Specification for Loadbearing Concrete Masonry UnitsC270 Specificat

12、ion for Mortar for Unit MasonryC482 Test Method for Bond Strength of Ceramic Tile toPortland Cement PasteC847 Specification for Metal LathC926 Specification for Application of Portland Cement-Based PlasterC932 Specification for Surface-Applied Bonding Com-pounds for Exterior PlasteringC933 Specifica

13、tion for Welded Wire LathC979/C979M Specification for Pigments for Integrally Col-ored ConcreteC1032 Specification for Woven Wire Plaster BaseC1059/C1059M Specification for Latex Agents for BondingFresh To Hardened ConcreteC1063 Specification for Installation of Lathing and Furring1This practice is

14、under the jurisdiction of ASTM Committee C15 on Manufac-tured Masonry Units and is the direct responsibility of Subcommittee C15.05 onMasonry Assemblies.Current edition approved Sept. 1, 2018. Published September 2018. Originallyapproved in 2013. Last previous edition approved in 2018 as C1780 18. D

15、OI:10.1520/C1780-18A.2Annual Book of ASTM Standards. Vol 04.01. See the section on SafetyPrecautions in the Manual of Cement Testing.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume infor

16、mation, 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 international standard was developed in accor

17、dance 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.1to Receive Interior and Exterior

18、 Portland Cement-BasedPlasterC1180 Terminology of Mortar and Grout for Unit MasonryC1232 Terminology for MasonryC1325 Specification for Fiber-Mat Reinforced CementitiousBacker UnitsC1384 Specification for Admixtures for Masonry MortarsC1670/C1670M Specification for Adhered ManufacturedStone Masonry

19、Veneer UnitsC1714/C1714M Specification for Preblended Dry MortarMix for Unit MasonryE2556/E2556M Specification for Vapor Permeable FlexibleSheet Water-Resistive Barriers Intended for MechanicalAttachment2.2 Other Standards:TMS 402/ACI 530/ASCE 5 Building Code Requirementsfor Masonry Structures4TMS 6

20、02/ACI 530.1/ASCE 6 Specification for MasonryStructures4ICC ES AC 376 Acceptance Criteria for Reinforced Cemen-titious Sheets Used as Wall and Ceiling Sheathing andFloor Underlayment52.3 ANSI Standards:6ANSI A118.1-2013.1 American National Standard Specifi-cations for Dry-Set Cement MortarANSI A118.

21、4-2013.1 American National Standard Specifi-cations for Modified Dry-Set Cement MortarANSI A118.15-2012.1 American National Standard Specifi-cations for Improved Modified Dry-Set Cement Mortar2.4 ICRI International Concrete Repair Institute:7No. 310.21997 Selecting and Specifying Concrete SurfacePre

22、paration for Sealers, Coatings and Polymer Overlays(formerly No. 03732). Concrete Surface Profile Chips.2.5 Masonry Veneer Manufacturers Association:8MVMA Installation Guide for Adhered Concrete MasonryVeneer3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 adhered manufactured

23、stone masonry veneer, ntheassembly of thin masonry units adhered to a backing with acementitious mortar.3.1.1.1 DiscussionOther names have been used for thisproduct since it was developed and the Masonry VeneerManufacturers Association can provide historic informationregarding names.3.1.2 back butte

24、r, vthe act of applying a setting bed mortarto the back of a masonry unit.3.1.3 brown coat, nin multiple coat stucco work, thesecond coat, applied over the scratch coat.3.1.4 drainage wall system, na system installation thatcreates a physical planar air gap between cladding system andwater resistive

25、 barrier.3.1.5 foundation weep screed, nan accessory used toterminate adhered manufactured stone masonry veneer at thebottom of exterior framed walls.3.1.5.1 DiscussionThis accessory shall have a sloped,solid, or perforated, ground or screed flange to facilitate theremoval of moisture from the air g

26、ap and a vertical attachmentflange not less than 312 in. (89 mm) long.3.1.6 full setting bed, nmortar bed of specified thickness,covering the complete back of units and free of voids.3.1.7 scratch coat, nthe first coat of mortar or hydrauliccement based plaster applied to a base and then scratched t

27、ocreate additional bonding area and mechanical interlock.3.1.8 setting bed, nthe mortar used to bond units to aprepared surface or scratch coat.3.1.9 sheathed frame substrate, nwood or metal/steelframing covered by a building code approved sheathingmaterial.3.1.10 thumb-print hard, adjdescription of

28、 mortar jointsto determine their readiness for tooling determined when themortar will retain the imprint of a thumb but no mortar istransferred to the thumb.3.1.11 tight fit joint, na joint created when units areinstalled with edges touching or less than38 in. (10 mm)distance between units.3.1.11.1

29、DiscussionMany units have varied and randomedges which make it impossible to define specific minimum ormaximum joint space.3.1.12 water resistive barrier (WRB), na material behindan exterior wall covering that is intended to resist liquid waterthat has penetrated the exterior covering from further i

30、ntrudinginto the exterior wall assembly.3.2 Refer to Terminology C1180 for additional terminologyfor mortar and Terminology C1232 for additional terminologyfor masonry.4. Materials4.1 Adhered manufactured stone masonry veneer shall com-ply with the following requirements:4.1.1 Units shall comply wit

31、h Specification C1670/C1670M.4.2 Water Resistive Barrier shall comply with SpecificationE2556/E2556M.NOTE 2Some adhered manufactured stone masonry veneer systemsutilize a liquid-applied water resistive barrier as part of their proprietarysystems. These materials are not discussed in this Practice, a

32、nd users areencouraged to perform their own evaluation of these proprietary systemsfor suitability.4.3 Lath shall comply with one of the following:4Available from The Masonry Society (TMS), 105 South Sunset Street, Suite Q,Longmont, CO 80501, http:/www.masonrysociety.org.5Available from ICC Evaluati

33、on Service, 3060 Saturn Street, Suite 100 Brea,California 92821, http:/www.iccsafe.org.6Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.7Available from International Concrete Repair Institute (ICRI), 38800 CountryClub Driv

34、e Farmington Hills, MI 48331, http:/www.icri.org.8Available from Masonry Veneer Manufacturers Association (MVMA), 13750Sunrise Valley Drive Herndon, VA 20171, http:/www.masonryveneer.org.C1780 18a24.3.1 Expanded metal lath shall be corrosion resistant, shallhave a minimum weight of 2.5 lb/yd2(1.4 kg

35、/m2) and shallcomply with the requirements of Specification C847.4.3.2 A38-in. rib, expanded metal lath shall be corrosionresistant and shall have a minimum weight of 3.4 lb/yd2(1.8kg/m2) and shall comply with the requirements of SpecificationC847.4.3.3 Woven wire mesh shall be corrosion resistant,

36、shall bea minimum of 18 gauge, and shall comply with the require-ments of Specification C1032.4.3.4 Welded wire lath shall be corrosion resistant and shallcomply with Specification C933.4.3.5 Non-metallic lath material shall be corrosion resistant,with a published evaluation report from an ANSI accr

37、editedevaluation service that rates the lath as acceptable substitute forthe above listed laths and be rated for use behind adheredmanufactured stone masonry veneer.NOTE 3It is acceptable to use lath materials that comply with 4.3 thatalso provide a paper backing which complies with the requirements

38、 of 4.2.4.4 Cement BoardCementitious Backer Units shall com-ply with Specification C1325. Cement boards shall have beenevaluated for interior or exterior use in accordance withICC-ES Acceptance Criteria AC 376 by an ANSI-accreditedevaluation service.4.5 Mortar:4.5.1 Mortar shall comply with one of t

39、he following:4.5.1.1 Type N or Type S of Specification C270.4.5.1.2 Type N or Type S of Specification C1714/C1714M.4.5.1.3 ANSI A118.1-2013.1, ANSI A118.4-2013.1, orANSI A118.15-2012.1.NOTE 4Mortar may be specified by the proportion method or theproperty method of Specification C270.4.5.2 Admixtures

40、 shall comply with Specification C1384.4.5.3 Bonding agents shall comply with SpecificationC1059/C1059M or Specification C932.4.5.4 Mortar coloring pigments shall comply with Specifi-cation C979/C979M.4.6 Lath fasteners shall comply with Specification C1063.4.7 Foundation weep screed shall comply wi

41、th SpecificationC1063.4.8 Stucco system scratch or brown coat, when used as theadhered manufactured stone masonry veneer scratch coat, shallcomply with Specification C926 up to the brown coat withoutapplication of the finish coat.4.9 Water used for mixing mortar or dampening units,scratch coat, or m

42、asonry surface shall be clean and free ofamounts of oils, acids, alkalies, salts, organic materials, orother substances that are deleterious to mortar or any metal inthe wall.5. Ambient Conditions5.1 Hot and Dry ConditionsIf the ambient conditionsexceed 100F (37C) or 90F (32C) with a wind velocitygr

43、eater than 8 mph (12.9 km/h) comply with the hot weatherconstruction requirements of local building code, the recom-mendations of adhered manufactured stone masonry veneerunit manufacturer and hot weather construction provisions ofTMS 602/ACI 530.1/ASCE 6. If there is a contradiction amongdocuments,

44、 local building code shall prevail.5.1.1 When adhered manufactured stone masonry veneer isapplied in hot or dry weather, before applying mortar, moistenthe scratch coat with a fine spray of water or a wet brush toprevent excessive absorption of water from the mortar. Thescratch coat shall appear wet

45、 but without free water on thesurface. Units shall also be moistened following the require-ments of 7.2.1.5.2 Freezing or Low TemperaturesAccelerating admix-tures shall comply with Specification C1384. Anti-freezeadmixtures to lower freezing point of mortar shall not be used.Accelerating admixtures

46、containing calcium chloride shall notbe used. If the ambient conditions are below 40F (4C), theinstallation shall comply with the cold weather constructionprovisions of TMS 602/ACI 530.1/ASCE 6.6. Substrate/Surface Preparation6.1 The substrates and preparation that follow are typicaland field proven

47、 applications. Installation over any othersubstrate requires the approval of the unit manufacturer.6.1.1 Alternative surface preparation shall be tested inaccordance with Test Method C482 as modified by thispractice. The minimum shear bond strength between the unitand the prepared surface shall be 5

48、0 psi (0.34 MPa). Refer tothe modifications outlined in Appendix X1.6.2 Masonry:6.2.1 Install units directly on masonry that is clean and freeof paint, dirt, sealers, loose or spalling material.6.2.2 All masonry surfaces that are dirty, painted, coatedwith curing compounds or surface sealed, shall b

49、e cleaned bypower washing, sandblasting, beadblasting or appropriate sol-vent to form a substrate suitable for bonding. If the surfacecondition cannot support direct application, install lath. Ifmasonry wall exhibits spalling, cracking or generaldeterioration, the wall shall be evaluated by the designer ofrecord for integrity before proceeding.6.3 Wood/Metal Framing:6.3.1 Water Resistive Barrier (WRB) InstallationInstalltwo separate layers of WRB outboard of the sheathingmaterial, in accordance with the WRB manufacturers instal-lation instruct