1、Designation: C723 98 (Reapproved 2012)Standard Practice forChemical-Resistant Resin Grouts for Brick or Tile1This standard is issued under the fixed designation C723; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 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 detailed information on the han-dling and proper use of chemical-resistant resin grouts forfilling
3、joints of chemical-resistant brick or tile such as thosecovered in Specification C658.NOTE 1Resin grouts and mortars are differentiated as follows: Resingrouts are applied to joints, generally14 in. (6 mm) wide, after the brickor tile are set in place and the setting bed has hardened (grouting ortil
4、esetters method). Resin mortars are troweled onto the brick or tile insufficient quantity to achieve a18-in. (3-mm) thick joint after the brick ortile are laid in place (buttering or bricklayers method). (See PracticeC399.)1.2 The values stated in inch-pound units are to be regardedas standard. The
5、values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 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
6、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 ConcretesC398 Practice for Use of H
7、ydraulic Cement Mortars inChemical-Resistant MasonryC399 Practice for Use of Chemical-Resistant Resin MortarsC658 Specification for Chemical-Resistant Resin Grouts forBrick or TileC904 Terminology Relating to Chemical-Resistant Nonme-tallic Materials3. Terminology3.1 DefinitionsFor definitions of te
8、rms used in thispractice, see Terminology C904.4. Storage4.1 When stated on the package, the manufacturers recom-mendations should be followed. In all instances, storage shouldbe in a dry place with containers tightly closed and away fromopen flames. Powder or resin that has become contaminatedshoul
9、d not be used.5. Apparatus5.1 For hand mixing, use clean nonabsorbent pails or mortarboxes. Paddles, trowels, or spatulas are suggested mixing tools.5.2 For power mixing, use suitable size mixing equipment,such as that shown in Fig. 1. Operate at speeds so as to preventair entrapment.6. Procedure6.1
10、 Mixing:6.1.1 Condition and mix the grout in accordance with themanufacturers specification. Mixed grout should be ofuniform, smooth consistency, free of lumps, with as littleentrapped air as possible. Clean equipment between batches toprevent buildup of partially set grout.6.1.2 For hand mixing, me
11、asure the liquid component(s)into the mixing container, add the powder slowly, and mixthoroughly.6.1.3 For power mixing, measure the liquid component(s)into the mixing container, add the powder slowly and mixthoroughly to ensure a uniform mix. Avoid excessive airentrapment. Follow the recommendation
12、s of 5.2.6.1.4 Vary the batch sizes according to temperature. In hotweather, reduce batch sizes; in cold weather, batch sizes maybe increased.6.1.5 In hot weather, the liquid component(s) of the groutmay be cooled by partially immersing the container in an icebath to extend the working life. Take ca
13、re to ensure that thecomponents are not contaminated with ice or water. Refrigera-tion may be used.6.2 Handling:1This practice is under the jurisdiction of ASTM Committee C03 on Chemical-Resistant Nonmetallic Materialsand is the direct responsibility of SubcommitteeC03.02 on Monolithics, Grouts and
14、Polymer Concretes.Current edition approved Aug. 1, 2012. Published September 2012. Originallyapproved in 1972. Last previous edition approved in 2008 as C723 98 (2008).DOI: 10.1520/C0723-98R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at se
15、rviceastm.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 States16.2.1 When installing resin grouts at temperatures bel
16、ow60F (16C) or above 90F (32C), special hardening systemsor precautions may be required. Consult manufacturer forrecommendations.6.2.2 Discard mixed grout that has become unworkable.6.3 Setting Brick or Tile:6.3.1 Various materials such as paraffin wax or other com-pounds and methods of application
17、are available from groutmanufacturers to ensure that the resin grout does not adhere tothe face of the brick or tile. It is imperative that only the faceof the brick or tile be protected prior to placing into the settingbed. Care must be taken to ensure that wax is not applied to thebrick or tile su
18、rface which is to be grouted.6.3.1.1 When grouting with water-washable grouts, waxingthe face of the brick or tile may not be required.6.3.2 Consult the manufacturer for recommendations on theappropriate substrate, its preparation, and suitable setting bedsfor the substrate.6.3.3 Sand-Cement Setting
19、 BedSet the brick or tile into astiff, moist sand-cement setting bed as described in PracticeC398. The brick or tile is bedded and tamped just deeplyenough to ensure full bedding and to permit leveling whilemaintaining14-in. (6-mm) wide joints. If necessary, rakeexcess sand-cement out of the joints
20、in order to ensure full jointdepth. Excess setting bed mortar in the joints or the use ofspacer mixes is not permitted. After the bed has set, apply thegrout to the cleaned joints. The grout manufacturer mayrecommend acid-washing the open joints with dilute acid suchas hydrochloric (muriatic), sulfa
21、mic, or phosphoric, prior togrouting the open joints. If acid washing is used, thoroughlyflush the area with potable water to ensure removal of anyresidual acid and allow joints to dry before grouting.6.3.4 Chemical-Resistant Setting BedsSet the brick or tileinto a18-in. (3-mm) thick layer of cataly
22、zed thermosettingresin mortar and tamp to permit leveling while maintainingapproximately14 in. (6 mm) wide joints. If service conditionsto which the floor will be subjected necessitate a full andcontinuous bed, back buttering of the brick or tile is required.Some systems may require a chemical-resis
23、tant membrane,depending upon the service conditions or the type of materialbeing used.6.4 Grouting Brick or Tile:6.4.1 Grout the brick or tile after the bed has set.NOTE 1These mechanical mixers are packaged in standard 5-gal pails which serve as the mixing drum. The mixers are available in varioush
24、orsepower and rpm for mixing resin mortars, grouts and monolithics.FIG. 1 Mechanical MixersC723 98 (2012)26.4.2 The temperature of the substrate and materials shouldbe 60 to 90F (16 to 32C). Setting time of resin grouts is afunction of temperature, that is, the lower the temperature, theslower the s
25、et; the higher the temperature, the faster the set.Special hardening systems are available to hasten or retard thecure of resin grouts at various temperatures. Consult the groutmanufacturer for details.6.4.3 Mix the resin grout in accordance with the manufac-turers recommendation. Place the freshly
26、mixed resin groutonto the surface of the previously set brick or tile andimmediately spread and work the grout into the open jointswith a rubber faced trowel.6.4.4 To facilitate cleaning, it is important to leave as littleresin grout as possible on the surface of the brick or tile.6.5 Cleaning Grout
27、 from Brick or Tile:6.5.1 Inspect floor to ensure that the grouted joints aresufficiently hard to permit cleaning of the floor. Removeparaffin wax or other compounds from surface of brick or tileusing steam, hot water, or other methods recommended by thegrout manufacturer.6.5.2 When grouting with wa
28、ter-washable grouts, cleaningof floor must take place before grout sets, in accordance withthe manufacturers directions.6.6 Cleaning of EquipmentMost grouts may be removedfrom equipment with soap and water or suitable solvents beforethe grouts begin to set.6.6.1 WarningProvide adequate ventilation a
29、nd keepopen flames away when flammable solvents are in use. Disposeof used solvents in accordance with applicable local govern-ment regulations.7. Curing7.1 Resin grouts are generally formulated to attain an initialset in 10 to 20 h at 73 6 4F (23 6 2C).7.2 The freshly installed brick or tile should
30、 be protectedfrom damage or contamination until the grout has attained itsinitial set. Keep all traffic, construction equipment, water, oil,grease, and similar contaminants, etc. away from the installa-tion during the curing process.8. Chemical Resistance8.1 Specific recommendations should be obtain
31、ed from themanufacturer. Chemical resistance of grout may be determinedin accordance with Test Method C267. If the floor is installedwithout an impervious membrane between the substrate andthe brick or tile, the chemical resistance of the completedinstallation may be considerably less than that of t
32、he chemicalresistant joint material. Penetration of chemicals may occurthrough the brick, tile, or joints that can cause degradation ofsubstrate. In severe chemical service, the installation must bemade utilizing a membrane between the brick or tile and thesubstrate. Installations may also be made u
33、tilizing the butteringmethod. (See Practice C399.)9. Keywords9.1 brick mortar; chemicalresistant; membrane; resingrout; setting bed; tile groutASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of th
34、is 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 ye
35、ars 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 commi
36、ttee, 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 194
37、28-2959,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/).C723 98 (2012)3
