1、Designation: C 397 00 (Reapproved 2005)Standard Practice forUse of Chemically Setting Chemical-Resistant Silicate andSilica Mortars1This standard is issued under the fixed designation C 397; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice provides information for the proper stor-age, mixing, and use of chemically setting
3、 silicate and silicamortars for bonding chemical-resistant brick or tile in order toobtain the optimum chemical resistance and physical strengthof 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
4、 conforming to Specifi-cations C 279, C 410, or C 980 are considered satisfactory foruse with these mortars.NOTE 1For specifications for mortars covered by this practice, seeSpecification C 466.1.4 The values stated in inch-pound units are to be regardedas the standard. The values given in parenthes
5、es are providedfor information only.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 limi
6、tations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 267 Test Method for Chemical Resistance of Mortars,Grouts, and Monolithic Surfacings and Polymer ConcretesC 279 Specification for Chemical-Resistant Masonry UnitsC 410 Specification for Industrial Floor BrickC 414 Test Method for Work
7、ing, Setting, and ServiceStrength Setting Times of Chemically Setting Chemical-Resistant Silicate and Silica MortarsC 466 Specification For Chemically Setting Silicate andSilica Chemical-Resistant MortarsC 904 Terminology Relating to Chemical Resistant Nonme-tallic MaterialsC 980 Specification for I
8、ndustrial Chimney Lining Brick3. Terminology3.1 For definitions of terms used in this practice, seeTerminology C 904.4. 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 f
9、rom 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
10、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
11、 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 container
12、s accordingto the recommended ratio. Liquid and powder levels may thenbe marked so that future measurements may be made byvolume.1This practice is under the jurisdiction of ASTM Committee C03 on Chemical-Resistant Nonmetallic Materials and is the direct responsibility of SubcommitteeC03.02 on Mortar
13、 and Monolithics.Current edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 1957. Last previous edition approved in 2000 as C 39700.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of A
14、STMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.1 The optimum properties may vary due to temperature.The mortar should be sufficient
15、ly stiff for the brick or tile toretain 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 has
16、been 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 the tempera-ture, the batch size shall be determined on the job site if dataare not available
17、 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 freshbatches.6.5 No additives, such as portland cement shall be added tothe mortar. Silica sand or other mate
18、rials 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 with good workmanship. Butter the surface to fullycover, leaving a slight mound of mortar in the center
19、 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 or the manufacturer and mortar is extruded from alljoints. Strike extruded mortar off the faces of the
20、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 Washing7.1 If acid washing is recommended by the manufacturer, itshall be carried out in accordance with hi
21、s 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 C 414 isrecommended for use in the determination of time to put intoservice.8.2 The installation shall be p
22、rotected 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 areresistant to most acids (except those containing fluorine).9.1.1 Exposure of silicate and silica mortars t
23、o 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 certain conditions crystal formation can occur insilicate mortars. If the crystals are growth salts, they
24、 candamage the joints.9.3 Chemical resistance to specific chemical media may bedetermined in accordance with Test Method C 267.9.4 Consult the manufacturer regarding service conditionsand selection of either sodium or potassium silicate, or silicamortars.10. Temperature Resistance10.1 Consult the ma
25、nufacturer regarding the temperatureresistance of a specific mortar.11. Keywords11.1 chemical-resistant; masonry units; mortars; silica;silicateASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of t
26、his 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 subject to revision at any time by the responsible technical committee and must be reviewed every five y
27、ears 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 Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical comm
28、ittee, 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 standard 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).C 397 00 (2005)2
