1、Designation: C1780 16Standard 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 last
2、 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 addressins
4、tallation 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 receivea
5、dhered veneer. The units included in this practice are manu-factured to meet the requirements of Specification C1670. Thispractice is limited to the installation of units. This practice doesnot cover all flashing or moisture management requirements.Refer to the applicable building code and project d
6、ocumentsfor additional flashing and moisture management 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 stated in inch-p
7、ound 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 veneer units sh
8、allmeet the requirements of the contract documents and buildingcode having jurisdiction over the project.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
9、 health practices and determine the applica-bility of regulatory limitations prior to use. (WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2. Referenced Documents2.1 ASTM Standards:3C90 Specification for Loadbearing Co
10、ncrete Masonry UnitsC270 Specification 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 fo
11、r Exterior PlasteringC933 Specification for Welded Wire LathC979 Specification for Pigments for Integrally Colored Con-creteC1032 Specification for Woven Wire Plaster BaseC1059 Specification for Latex Agents for Bonding Fresh ToHardened ConcreteC1063 Specification for Installation of Lathing and Fur
12、ringto Receive Interior and Exterior Portland Cement-BasedPlasterC1180 Terminology of Mortar and Grout for Unit MasonryC1232 Terminology of MasonryC1325 Specification for Non-Asbestos Fiber-Mat Rein-forced Cementitious Backer UnitsC1384 Specification for Admixtures for Masonry MortarsC1670 Specifica
13、tion for Adhered Manufactured Stone Ma-sonry Veneer UnitsC1714 Specification for Preblended Dry Mortar Mix forUnit MasonryE2556/E2556M Specification for Vapor Permeable FlexibleSheet Water-Resistive Barriers Intended for MechanicalAttachment1This practice is under the jurisdiction of ASTM Committee
14、C15 on Manufac-tured Masonry Units and is the direct responsibility of Subcommittee C15.05 onMasonry Assemblies.Current edition approved Feb. 15, 2016. Published March 2016. Originallyapproved in 2013. Last previous edition approved in 2015 as C1780 15a. DOI:10.1520/C1780-16.2Annual Book of ASTM Sta
15、ndards. 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 information, refer to the standards Document Summa
16、ry 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 States12.2 Other Standards:TMS 402/ACI 530/ASCE 5 Building Code Requirementsfor Masonry Structures4TM
17、S 602/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 A1
18、18.4-2013.1 American National Standard Specifi-cations for Modified Dry-Set Cement Mortar2.4 ICRI International Concrete Repair Institute:7No. 310.21997 Selecting and Specifying Concrete SurfacePreparation for Sealers, Coatings and Polymer Overlays(formerly No. 03732). Concrete Surface Profile Chips
19、.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 stone masonry veneer, ntheassembly of thin masonry units adhered to a backing with acementitious mortar
20、.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 butter, vthe act of applying a setting bed mortarto the back of a masonry unit.3.1.3 brown coat, nin multipl
21、e 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 barrier.3.1.5 foundation weep screed, nan accessory used toterminate adhered manufactured stone masonr
22、y 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 gap and a vertical attachmentflange not less than 312 in. (89 mm) long.3.1.6 full setting bed, nmortar b
23、ed 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 tocreate additional bonding area and mechanical interlock.3.1.8 setting bed, nthe mortar used to bond un
24、its 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 mortar jointsto determine their readiness for tooling determined when themortar will retain the imprin
25、t 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 DiscussionMany units have varied and randomedges which make it impossible to define specific minimum or
26、maximum 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 intrudinginto the exterior wall assembly.3.2 Refer to Terminology C1180 for additional terminologyfor mo
27、rtar 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 with Specification C1670.4.2 Water Resistive Barrier shall comply with SpecificationE2556/E2556M.4.3 Lath
28、shall comply with one of the following:4.3.1 Expanded metal lath shall be corrosion resistant, shallhave a minimum weight of 2.5 lb/yd2(1.4 kg/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 w
29、eight 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, 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 shallcom
30、ply with Specification C933.4.3.5 Non-metallic lath material shall be corrosion resistant,with a published evaluation report from an ANSI accreditedevaluation service that rates the lath as acceptable substitute forthe above listed laths and be rated for use behind adheredmanufactured stone masonry
31、veneer.NOTE 2It is acceptable to use lath materials that comply with 4.3 thatalso provide a paper backing which complies with the requirements of 4.2.4.4 Cement BoardCementitious Backer Units shall com-ply with Specification C1325. Cement boards shall have been4Available from The Masonry Society (TM
32、S), 105 South Sunset Street, Suite Q,Longmont, CO 80501, http:/www.masonrysociety.org.5Available from ICC Evaluation 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, N
33、Y 10036, http:/www.ansi.org.7Available from International Concrete Repair Institute (ICRI), 38800 CountryClub Drive 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
34、.C1780 162evaluated for exterior use in accordance with ICC-ES Accep-tance Criteria AC 376 by an ANSI-accredited evaluationservice.4.5 Mortar:4.5.1 Mortar shall comply with one of the following:4.5.1.1 Type N or Type S of Specification C270.4.5.1.2 Type N or Type S of Specification C1714.4.5.1.3 ANS
35、I A118.1-2013.1 or ANSI A118.4-2013.1.NOTE 3Mortar may be specified by the proportion method or theproperty method of Specification C270.4.5.2 Admixtures shall comply with Specification C1384.4.5.3 Bonding agents shall comply with SpecificationC1059 or Specification C932.4.5.4 Mortar coloring pigmen
36、ts shall comply with Specifi-cation C979.4.6 Lath fasteners shall comply with Specification C1063.4.7 Foundation weep screed shall comply with SpecificationC1063.4.8 Stucco system scratch or brown coat, when used as theadhered manufactured stone masonry veneer scratch coat, shallcomply with Specific
37、ation C926 up to the brown coat withoutapplication of the finish coat.4.9 Water used for mixing mortar or dampening units,scratch coat, or masonry surface shall be clean and free ofamounts of oils, acids, alkalies, salts, organic materials, orother substances that are deleterious to mortar or any me
38、tal inthe wall.5. Ambient Conditions5.1 Hot and Dry ConditionsIf the ambient conditionsexceed 100F (37C) or 90F (32C) with a wind velocitygreater than 8 mph (12.9 km/h) comply with the hot weatherconstruction requirements of local building code, the recom-mendations of adhered manufactured stone mas
39、onry veneerunit manufacturer and hot weather construction provisions ofTMS 602/ACI 530.1/ASCE 6. If there is a contradiction amongdocuments, local building code shall prevail.5.1.1 When adhered manufactured stone masonry veneer isapplied in hot or dry weather, before applying mortar, moistenthe scra
40、tch coat with a fine spray of water or a wet brush toprevent excessive absorption of water from the mortar. Thescratch coat shall appear wet 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-tur
41、es shall comply with Specification C1384. Anti-freezeadmixtures to lower freezing point of mortar shall not be used.Accelerating admixtures containing calcium chloride shall notbe used. If the ambient conditions are below 40F (4C), theinstallation shall comply with the cold weather constructionprovi
42、sions of TMS 602/ACI 530.1/ASCE 6.6. Substrate/Surface Preparation6.1 The substrates and preparation that follow are typicaland field proven applications. Installation over any othersubstrate requires the approval of the unit manufacturer.6.1.1 Alternative surface preparation shall be tested inaccor
43、dance with Test Method C482 as modified by thispractice. The minimum shear bond strength between the unitand the prepared surface shall be 50 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, se
44、alers, loose or spalling material.6.2.2 All masonry surfaces that are dirty, painted, coatedwith curing compounds or surface sealed, shall be cleaned bypower washing, sandblasting, beadblasting or appropriate sol-vent to form a substrate suitable for bonding. If the surfacecondition cannot support d
45、irect 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
46、of the sheathingmaterial, in accordance with the WRB manufacturers instal-lation instructions. Each layer is not required to be the samematerial. The WRB shall be integrated with all flashingmaterials in such a manner that prevents penetration of waterbeyond the WRB. WRB shall overlap a minimum 6 in
47、. (152mm) at vertical joints and a minimum 2 in. (50 mm) athorizontal joints and shall be applied in shingle fashion. WRBfasteners shall be spaced in accordance with the water resistivebarrier manufacturers installation instructions.NOTE 4Some building code jurisdictions allow a single layer WRBwhen
48、 a drainage wall system is used. This is an acceptable installationwhen the drainage wall system meets the requirements of Section 10 ofthis practice.6.3.2 Sheathed Frame Substrate:6.3.2.1 Foundation Weep ScreedInstall foundation weepscreed in accordance with Specification C1063.6.3.2.2 LathInstall
49、lath which meets the requirements of4.3 in accordance with Specification C1063, or the alternatelath manufacturers installation instructions, or the projectdesign documents.NOTE 5In order to facilitate embedment of lath in mortar, some lathproducts will require furring. Furring and self-furring lath are addressed inSpecification C1063, Table 3.6.3.2.3 Scratch CoatInstall a scratch coat with a minimumthickness of12 in. (13 mm). The scratch coat shall be appliedwith sufficient material and pressure to fully engage andencapsulate the lath
