1、Designation: C1780 15C1780 15aStandard 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)2. Referenced Documents2.1 ASTM Standards:3C90 Specification for L
10、oadbearing 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 Surface-Applied Bonding
11、 Compounds for Exterior PlasteringC933 Specification for Welded Wire LathC979 Specification for Pigments for Integrally Colored ConcreteC1032 Specification for Woven Wire Plaster BaseC1059 Specification for Latex Agents for Bonding Fresh To Hardened ConcreteC1063 Specification for Installation of La
12、thing and Furring to Receive Interior and Exterior Portland Cement-Based PlasterC1180 Terminology of Mortar and Grout for Unit Masonry1 This practice is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.05 on MasonryAssemb
13、lies.Current edition approved Feb. 15, 2015Sept. 1, 2015. Published March 2015September 2015. Originally approved in 2013. Last previous edition approved in 20142015as C1780 14.15. DOI: 10.1520/C1780-15.10.1520/C1780-15A.2 Annual Book of ASTM Standards. Vol 04.01. See the section on Safety Precautio
14、ns 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 Document Summary page on the ASTM website.This document is not an AS
15、TM 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 recommends that users consult prior editions as appropriate. In a
16、ll 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 C700, West Conshohocken, PA 19428-2959. United States1C1232C132
17、5 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 MasonryE2556/E2556M Specification for
18、 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 Acceptance Criteria for Reinforced Cement
19、itious 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 Cement Mortar2.4 ICRI International Concr
20、ete Repair Institute:7No. 310.21997 Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings and Polymer Overlays (formerlyNo. 03732). Concrete Surface Profile Chips.2.5 Masonry Veneer Manufacturers Association:8MVMA Installation Guide for Adhered Concrete Masonry Veneer3. Termino
21、logy3.1 Definitions of Terms Specific to This Standard:3.1.1 adhered manufactured stone masonry veneer, nthe assembly of thin masonry units adhered to a backing with acementitious mortar.3.1.1.1 DiscussionOther names have been used for this product since it was developed and the Masonry Veneer Manuf
22、acturers 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.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 instal
23、lation that creates a physical planar air gap between cladding system and waterresistive barrier.3.1.5 foundation weep screed, nan accessory used to terminate adhered manufactured stone masonry veneer at the bottom ofexterior framed walls.3.1.5.1 DiscussionThis accessory shall have a sloped, solid,
24、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) 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
25、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 setting 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 c
26、overed by a building code approved sheathing material.3.1.10 thumb-print hard, adjdescription of mortar 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
27、 units are installed with edges touching or less than 38 in. (10 mm) distance betweenunits.4 Available from The Masonry Society (TMS), 105 South Sunset Street, Suite Q, Longmont, CO 80501, http:/www.masonrysociety.org.5 Available from ICC Evaluation Service, 3060 Saturn Street, Suite 100 Brea, Calif
28、ornia 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 Concrete Repair Institute (ICRI), 38800 Country Club Drive Farmington Hills, MI 48331, http:/www.icri.org
29、.8 Available from Masonry Veneer Manufacturers Association (MVMA), 13750 Sunrise Valley Drive Herndon, VA 20171, http:/www.masonryveneer.org.C1780 15a23.1.11.1 DiscussionMany units have varied and random edges which make it impossible to define specific minimum or maximum joint space.3.1.12 water re
30、sistive barrier (WRB), na material behind an exterior wall covering that is intended to resist liquid water thathas penetrated the exterior covering from further intruding into the exterior wall assembly.3.2 Refer to Terminology C1180 for additional terminology for mortar and Terminology C1232 for a
31、dditional terminology formasonry.4. Materials4.1 Adhered manufactured stone masonry veneer shall comply with the following requirements:4.1.1 Units shall comply with Specification C1670.4.2 Water Resistive Barrier shall comply with Specification E2556/E2556M.4.3 Lath shall comply with one of the fol
32、lowing: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 Specification 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/
33、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 comply with the requirementsof Specification C1032.4.3.4 Welded wire lath shall be corrosion resistant and shall comply with Specification C93
34、3.4.3.5 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 for the above listed laths and be rated for use behind adheredmanufactured stone masonry veneer.NOTE 2It is accep
35、table 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 Backer Units shall comply with Specification C1325. Cement boards shall have beenevaluated for exterior use in accordance with ICC-ES Acceptance
36、 Criteria AC 376 by an ANSI-accredited evaluation service.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 ANSI A118.1-2013.1 or ANSI A118.4-2013.1.NOTE 3Mortar may be specified by th
37、e proportion method or the property method of Specification C270.4.5.2 Admixtures shall comply with 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
38、 with Specification C1063.4.7 Foundation weep screed shall comply with Specification C1063.4.8 Stucco 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
39、.4.9 Water used for mixing mortar or dampening units, scratch coat, or masonry surface shall be clean 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 t
40、he ambient conditions exceed 100F (37C) or 90F (32C) with a wind velocity greater than8 mph (12.9 km/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 provisi
41、ons of TMS 602/ACI 530.1/ASCE 6.If there is a contradiction among documents, local building code shall prevail.5.1.1 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 e
42、xcessive absorption of water from the mortar. The scratch coatshall appear wet but without 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
43、 tolower freezing point of mortar shall not be used. Accelerating admixtures containing calcium 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.C1780 15a36. Substrate/Surfa
44、ce Preparation6.1 The substrates and preparation that follow are typical and field proven applications. 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 pr
45、actice. Theminimum shear bond strength between the unit and the prepared surface shall be 50 psi (0.34 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 maso
46、nry surfaces that are dirty, painted, coated with curing compounds or surface sealed, shall be cleaned 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
47、 exhibits spalling, cracking or general deterioration, the wall shall beevaluated by the designer of 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
48、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
49、 in. (50 mm) at horizontal joints and shall be applied inshingle fashion. WRB fasteners shall be spaced in accordance with the water resistive barrier manufacturers installationinstructions.NOTE 4Some building code jurisdictions allow a single layer WRB when a drainage wall system is used. This is an acceptable installation when thedrainage wall system meets the requirements of Section 10 of this practice.6.3.2 Sheathed Frame Substrate:6.3.2.1 Foundation Weep ScreedInstall foundation weep screed in accordance with Specification C1063.6.3
