1、Designation: C1780 16aC1780 17Standard 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 yea
2、r of last 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 procedures to designers and installers of adhered manufactured sto
3、ne masonryveneer in residential and commercial construction. This information is meant to complement the specific installation instructionsprovided by manufacturers of adhered manufactured stone masonry veneers and recognized building codes, but is not meant toreplace them. This practice does not ad
4、dress installation methods or techniques for all materials in the building envelope. Thispractice covers the installation of adhered manufactured stone masonry veneer units for application as adhered veneer to exteriorand interior walls, columns, landscape structures and other structures suitable to
5、 receive adhered veneer. The units included in thispractice are manufactured to meet the requirements of Specification C1670. This practice is limited to the installation of units. Thispractice does not cover all flashing or moisture management requirements. Refer to the applicable building code and
6、 projectdocuments for additional flashing and moisture management requirements.NOTE 1The Masonry Veneer Manufacturers Association (MVMA) publication Installation Guide for Adhered Concrete Masonry Veneer providesgenerally accepted methods and details for installation and flashing.1.2 The values stat
7、ed in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 All workmanship and materials related to the installation of adhered manufactured stone masonry ve
8、neer units shall meetthe requirements of the contract documents and building code having jurisdiction over the project.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropri
9、ate safety and health practices and determine the applicability of regulatorylimitations prior to use. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin andtissue upon prolonged exposure.2)1.5 This international standard was developed in accordance with i
10、nternationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C90
11、 Specification for Loadbearing Concrete Masonry UnitsC270 Specification for Mortar for Unit MasonryC482 Test Method for Bond Strength of Ceramic Tile to Portland Cement PasteC847 Specification for Metal LathC926 Specification for Application of Portland Cement-Based PlasterC932 Specification for Sur
12、face-Applied Bonding Compounds for Exterior PlasteringC933 Specification for Welded Wire LathC979 Specification for Pigments for Integrally Colored ConcreteC1032 Specification for Woven Wire Plaster Base1 This practice is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and
13、 is the direct responsibility of Subcommittee C15.05 on MasonryAssemblies.Current edition approved Aug. 1, 2016June 1, 2017. Published August 2016July 2017. Originally approved in 2013. Last previous edition approved in 2016 as C1780 16.16a. DOI: 10.1520/C1780-16A.10.1520/C1780-17.2 Annual Book of A
14、STM Standards. Vol 04.01. See the section on Safety Precautions in the Manual of Cement Testing.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Documen
15、t Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM reco
16、mmends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C7
17、00, West Conshohocken, PA 19428-2959. United States1C1059 Specification for Latex Agents for Bonding Fresh To Hardened ConcreteC1063 Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based PlasterC1180 Terminology of Mortar and Grout for Unit Maso
18、nryC1232 Terminology for MasonryC1325 Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer UnitsC1384 Specification for Admixtures for Masonry MortarsC1670 Specification for Adhered Manufactured Stone Masonry Veneer UnitsC1714 Specification for Preblended Dry Mortar Mix for Unit M
19、asonryE2556/E2556M Specification for Vapor Permeable Flexible Sheet Water-Resistive Barriers Intended for MechanicalAttachment2.2 Other Standards:TMS 402/ACI 530/ASCE 5 Building Code Requirements for Masonry Structures4TMS 602/ACI 530.1/ASCE 6 Specification for Masonry Structures4ICC ES AC 376 Accep
20、tance Criteria for Reinforced Cementitious Sheets Used as Wall and Ceiling Sheathing and FloorUnderlayment52.3 ANSI Standards:6ANSI A118.1-2013.1 American National Standard Specifications for Dry-Set Cement MortarANSI A118.4-2013.1 American National Standard Specifications for Modified Dry-Set Cemen
21、t MortarANSI A118.15-2012.1 American National Standard Specifications for Improved Modified Dry-Set Cement Mortar2.4 ICRI International Concrete Repair Institute:7No. 310.21997 Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings and Polymer Overlays (formerlyNo. 03732). Concr
22、ete Surface Profile Chips.2.5 Masonry Veneer Manufacturers Association:8MVMA Installation Guide for Adhered Concrete Masonry Veneer3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 adhered manufactured stone masonry veneer, nthe assembly of thin masonry units adhered to a backin
23、g with acementitious mortar.3.1.1.1 DiscussionOther names have been used for this product since it was developed and the Masonry Veneer Manufacturers Association canprovide historic information regarding names.3.1.2 back butter, vthe act of applying a setting bed mortar to the back of a masonry unit
24、.3.1.3 brown coat, nin multiple coat stucco work, the second coat, applied over the scratch coat.3.1.4 drainage wall system, na system installation that creates a physical planar air gap between cladding system and waterresistive barrier.3.1.5 foundation weep screed, nan accessory used to terminate
25、adhered manufactured stone masonry veneer at the bottom ofexterior framed walls.3.1.5.1 DiscussionThis accessory shall have a sloped, solid, or perforated, ground or screed flange to facilitate the removal of moisture from the airgap and a vertical attachment flange not less than 312 in. (89 mm) lon
26、g.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 hydraulic cement based plaster applied to a base and then scratched to createadditional bonding area and mechanical interlock.3.1.8 set
27、ting bed, nthe mortar used to bond units to a prepared surface or scratch coat.3.1.9 sheathed frame substrate, nwood or metal/steel framing covered by a building code approved sheathing material.4 Available from The Masonry Society (TMS), 105 South Sunset Street, Suite Q, Longmont, CO 80501, http:/w
28、ww.masonrysociety.org.5 Available from ICC Evaluation Service, 3060 Saturn Street, Suite 100 Brea, California 92821, http:/www.iccsafe.org.6 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.7 Available from International C
29、oncrete Repair Institute (ICRI), 38800 Country Club Drive Farmington Hills, MI 48331, http:/www.icri.org.8 Available from Masonry Veneer Manufacturers Association (MVMA), 13750 Sunrise Valley Drive Herndon, VA 20171, http:/www.masonryveneer.org.C1780 1723.1.10 thumb-print hard, adjdescription of mor
30、tar joints to determine their readiness for tooling determined when the mortarwill retain the imprint of a thumb but no mortar is transferred to the thumb.3.1.11 tight fit joint, na joint created when units are installed with edges touching or less than 38 in. (10 mm) distance betweenunits.3.1.11.1
31、DiscussionMany units have varied and random edges which make it impossible to define specific minimum or maximum joint space.3.1.12 water resistive barrier (WRB), na material behind an exterior wall covering that is intended to resist liquid water thathas penetrated the exterior covering from furthe
32、r intruding into the exterior wall assembly.3.2 Refer to Terminology C1180 for additional terminology for mortar and Terminology C1232 for additional terminology formasonry.4. Materials4.1 Adhered manufactured stone masonry veneer shall comply with the following requirements:4.1.1 Units shall comply
33、 with Specification C1670.4.2 Water Resistive Barrier shall comply with Specification E2556/E2556M.4.3 Lath shall comply with one of the following:4.3.1 Expanded metal lath shall be corrosion resistant, shall have a minimum weight of 2.5 lb/yd2 (1.4 kg/m2) and shall complywith the requirements of Sp
34、ecification C847.4.3.2 A 38-in. rib, expanded metal lath shall be corrosion resistant and shall have a minimum weight of 3.4 lb/yd2 (1.8 kg/m2)and shall comply with the requirements of Specification C847.4.3.3 Woven wire mesh shall be corrosion resistant, shall be a minimum of 18 gauge, and shall co
35、mply with the requirementsof Specification C1032.4.3.4 Welded wire lath shall be corrosion resistant and shall comply 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 lat
36、h as acceptable substitute for the above listed laths and be rated for use behind adheredmanufactured stone masonry veneer.NOTE 2It is acceptable to use lath materials that comply with 4.3 that also provide a paper backing which complies with the requirements of 4.2.4.4 Cement BoardCementitious Back
37、er Units shall comply with Specification C1325. Cement boards shall have beenevaluated for interior or exterior use in accordance with ICC-ES Acceptance 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
38、Specification C270.4.5.1.2 Type N or Type S of Specification C1714.4.5.1.3 ANSI A118.1-2013.1 A118.1-2013.1, ANSI A118.4-2013.1, or ANSI A118.4-2013.1.A118.15-2012.1.NOTE 3Mortar may be specified by the proportion method or the property method of Specification C270.4.5.2 Admixtures shall comply with
39、 Specification C1384.4.5.3 Bonding agents shall comply with Specification C1059 or Specification C932.4.5.4 Mortar coloring pigments shall comply with Specification C979.4.6 Lath fasteners shall comply with Specification C1063.4.7 Foundation weep screed shall comply with Specification C1063.4.8 Stuc
40、co system scratch or brown coat, when used as the adhered manufactured stone masonry veneer scratch coat, shallcomply with Specification C926 up to the brown coat without application of the finish coat.4.9 Water used for mixing mortar or dampening units, scratch coat, or masonry surface shall be cle
41、an and free of amounts ofoils, acids, alkalies, salts, organic materials, or other substances that are deleterious to mortar or any metal in the wall.5. Ambient Conditions5.1 Hot and Dry ConditionsIf the ambient conditions exceed 100F (37C) or 90F (32C) with a wind velocity greater than8 mph (12.9 k
42、m/h) comply with the hot weather construction requirements of local building code, the recommendations of adheredmanufactured stone masonry veneer unit manufacturer and hot weather construction provisions of TMS 602/ACI 530.1/ASCE 6.If there is a contradiction among documents, local building code sh
43、all prevail.C1780 1735.1.1 When adhered manufactured stone masonry veneer is applied in hot or dry weather, before applying mortar, moisten thescratch coat with a fine spray of water or a wet brush to prevent excessive absorption of water from the mortar. The scratch coatshall appear wet but without
44、 free water on the surface. Units shall also be moistened following the requirements of 7.2.1.5.2 Freezing or Low TemperaturesAccelerating admixtures shall comply with Specification C1384.Anti-freeze admixtures tolower freezing point of mortar shall not be used. Accelerating admixtures containing ca
45、lcium chloride shall not be used. If theambient conditions are below 40F (4C), the installation shall comply with the cold weather construction provisions of TMS602/ACI 530.1/ASCE 6.6. Substrate/Surface Preparation6.1 The substrates and preparation that follow are typical and field proven applicatio
46、ns. Installation over any other substraterequires the approval of the unit manufacturer.6.1.1 Alternative surface preparation shall be tested in accordance with Test Method C482 as modified by this practice. Theminimum shear bond strength between the unit and the prepared surface shall be 50 psi (0.
47、34 MPa). Refer to the modificationsoutlined in Appendix X1.6.2 Masonry:6.2.1 Install units directly on masonry that is clean and free of paint, dirt, sealers, loose or spalling material.6.2.2 All masonry surfaces that are dirty, painted, coated with curing compounds or surface sealed, shall be clean
48、ed by powerwashing, sandblasting, beadblasting or appropriate solvent to form a substrate suitable for bonding. If the surface condition cannotsupport direct application, install lath. If masonry wall exhibits spalling, cracking or general deterioration, the wall shall beevaluated by the designer of
49、 record for integrity before proceeding.6.3 Wood/Metal Framing:6.3.1 Water Resistive Barrier (WRB) InstallationInstall two separate layers of WRB outboard of the sheathing material, inaccordance with the WRB manufacturers installation instructions. Each layer is not required to be the same material. The WRBshall be integrated with all flashing materials in such a manner that prevents penetration of water beyond the WRB. WRB shalloverlap a minimum 6 in. (152 mm) at vertical joints and a minimum 2 in. (50 mm) at horizontal joints and shall be
