1、Designation: C397 00 (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 revi
2、sion, 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 sili
3、cate 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 conf
4、orming to Specifi-cations C279, C410,orC980 are considered satisfactory foruse with these mortars.NOTE 1For 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 mathemat
5、icalconversions 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
6、 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 Specif
7、ication 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-
8、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
9、 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
10、 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
11、 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 po
12、wderand 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 ti
13、le 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 1
14、957. 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
15、 page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1retain its position without slipping or sliding or withoutsagging out of the joint.6.2 Using a clean mortar pan or other suitable container, addapproximately thr
16、ee 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 tim
17、e 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 discard it before preparing fresh
18、batches.6.5 No additives, such as portland cement shall be added tothe mortar. Silica sand or other materials shall not be addedunless recommended by the manufacturer, and then only in aquantity and quality specified by the manufacturer.6.6 Apply the mortar to the brick or tile in a mannerconsistent
19、 with good workmanship. Butter the surface to fullycover, leaving a slight mound of mortar in the center of thebrick face. Strike the mounded mortar toward each edge toensure full contact. Tap the brick or tile firmly into position sothat the joints are of the width recommended by the designengineer
20、 or the manufacturer and mortar is extruded from alljoints. Strike extruded mortar off the faces of the brick or tilewith a trowel. Chemical-resistant brickwork joints should be asnarrow as good workmanship and uniformity of the brick ortile will permit (preferably less than18 in. (3 mm).7. Acid Was
21、hing7.1 If acid washing is recommended by the manufacturer, itshall be carried out in accordance with his directions.8. Curing8.1 The time interval between the bonding of the brick ortile and the time the structure can be put into service shall bethat recommended by the manufacturer. Test Method C41
22、4 isrecommended for use in the determination of time to put intoservice.8.2 The installation shall be protected from moisture in allforms, and mechanical damage, for the period of time recom-mended by the manufacturer.9. Chemical Resistance9.1 Sodium and potassium silicate, and silica mortars areres
23、istant to most acids (except those containing fluorine).9.1.1 Exposure of silicate and silica mortars to water,boiling water, or neutral salt solutions may be detrimental.Consult the manufacturer for recommendations.9.1.2 Silicate and silica mortars are generally not resistant toalkalis.9.2 Under ce
24、rtain conditions crystal formation can occur insilicate mortars. If the crystals are growth salts, they candamage the joints.9.3 Chemical resistance to specific chemical media may bedetermined in accordance with Test Method C267.9.4 Consult the manufacturer regarding service conditionsand selection
25、of either sodium or potassium silicate, or silicamortars.10. Temperature Resistance10.1 Consult the manufacturer regarding the temperatureresistance of a specific mortar.11. Keywords11.1 chemical-resistant; masonry units; mortars; silica; sili-cateASTM International takes no position respecting the
26、validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is
27、subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Head
28、quarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This sta
29、ndard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C397 00 (2012)2
