ASTM_C_397_-_00_2012.pdf

Designation:C39700(Reapproved 2012)Standard Practice forUse of Chemically Setting Chemical-Resistant Silicate andSilica Mortars1This standard is issued under the fixed designation C397;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice provides information for the properstorage,mixing,and use of chemically setting silicate andsilica mortars for bonding chemical-resistant brick or tile inorder to obtain the optimum chemical resistance and physicalstrength of the mortar.1.2 This practice does not apply to the air-setting type ofsilicate and silica chemical-resistant mortars.1.3 Chemical-resistant brick or tile conforming to Specifi-cations C279,C410,or C980 are considered satisfactory foruse with these mortars.NOTE1For specifications for mortars covered by this practice,seeSpecification C466.1.4 The values stated 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.1.5 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C267 Test Methods for Chemical Resistance of Mortars,Grouts,and Monolithic Surfacings and Polymer ConcretesC279 Specification for Chemical-Resistant Masonry UnitsC410 Specification for Industrial Floor BrickC414 Test Method for Working,Setting,and ServiceStrength Setting Times of Chemically Setting Chemical-Resistant Silicate and Silica MortarsC466 Specification for Chemically Setting Silicate andSilica Chemical-Resistant MortarsC904 Terminology Relating to Chemical-Resistant Nonme-tallic MaterialsC980 Specification for Industrial Chimney Lining Brick3.Terminology3.1 For definitions of terms used in this practice,seeTerminology C904.4.Shipment and Storage4.1 The powder shall be protected from water duringshipment and storage.Powder that has become wet shall bediscarded.4.2 The liquid binder shall be protected from freezingduring shipment and storage.In the event that any containers ofliquid have ruptured,they shall be discarded.4.3 In the event that silica sols freeze,they must bediscarded.In the event that silicates freeze,they may berestored by warming and thorough stirring until a uniformsolution results.Consult the manufacturer for recommenda-tions.5.Installation Conditions5.1 Silicate and silica mortars shall be applied when thepowder,binder or water,brick or tile,substrate and ambient airtemperatures are all between 50F(10C)and 90F(32C).Fortemperatures outside this range,consult the manufacturer forrecommendations.5.2 The brick or tile and substrate shall be clean and dryduring installation.6.Mixing and Application6.1 Use the proportions of powder to binder or potablewater recommended by the manufacturer.Weigh the powderand binder or potable water into separate containers accordingto the recommended ratio.Liquid and powder levels may thenbe marked so that future measurements may be made byvolume.6.1.1 The optimum properties may vary due to temperature.The mortar should be sufficiently stiff for the brick or tile to1This practice is under the jurisdiction of ASTM Committee C03 on Chemical-Resistant Nonmetallic Materials and is the direct responsibility of SubcommitteeC03.02 on Monolithics,Grouts and Polymer Concretes.Current edition approved Aug.1,2012.Published September 2012.Originallyapproved in 1957.Last previous edition approved in 2005 as C39700(2005).DOI:10.1520/C0397-00R12.2For 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 Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 retain its position without slipping or sliding or withoutsagging out of the joint.6.2 Using a clean mortar pan or other suitable container,addapproximately three fourths of the powder to the liquid and mixwith hoe,trowel,or power mixer until all of the powder hasbeen wetted.Add the remainder of the powder to the mix andcontinue mixing to a proper mortar consistency.6.3 Mix only as much mortar as can be used during itsworking time.Since the working time depends on thetemperature,the batch size shall be determined on the job siteif data are not available from the manufacturer.6.4 Mortar that has begun to set shall not be altered byadding binder or water.Remove mortar that has begun to setfrom the mortar pan,and dis