1、Designation: C 723 98 (Reapproved 2008)Standard Practice forChemical-Resistant Resin Grouts for Brick or Tile1This standard is issued under the fixed designation C 723; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st 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 forfillin
3、g joints of chemical-resistant brick or tile such as thosecovered in Specification C 658.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 or
4、tilesetters 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 PracticeC 399.)1.2 The values stated in inch-pound units are to be regardedas standard.
5、The 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
6、 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:2C 267 Test Methods for Chemical Resistance of Mortars,Grouts, and Monolithic Surfacings and Polymer ConcretesC 398 Practice for Us
7、e of Hydraulic Cement Mortars inChemical-Resistant MasonryC 399 Practice for Use of Chemical-Resistant Resin Mor-tarsC 658 Specification for Chemical-Resistant Resin Groutsfor Brick or TileC 904 Terminology Relating to Chemical-Resistant Non-metallic Materials3. Terminology3.1 DefinitionsFor definit
8、ions of terms used in this prac-tice, see Terminology C 904.4. 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 cont
9、aminatedshould 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.
10、 Procedure6.1 Mixing:6.1.1 Condition and mix the grout in accordance with themanufacturers specification. Mixed grout should be of uni-form, smooth consistency, free of lumps, with as little en-trapped air as possible. Clean equipment between batches toprevent buildup of partially set grout.6.1.2 Fo
11、r hand mixing, measure 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 t
12、he recommendations 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.1This practice is under the jurisdiction of ASTM Committee C03 on Chemical-Resistant Nonmetallic Materials and is the direct responsibility o
13、f SubcommitteeC03.02 on Monolithics, Grouts and Polymer Concretes.Current edition approved June 1, 2008. Published July 2008. Originally approvedin 1972. Last previous edition approved in 2003 as C 723 98 (2003).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Cus
14、tomer Service at serviceastm.org. For Annual Book of ASTMStandards 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.6.1.5 In hot weather, the liquid c
15、omponent(s) of the groutmay be cooled by partially immersing the container in an icebath to extend the working life. Take care to ensure that thecomponents are not contaminated with ice or water. Refrigera-tion may be used.6.2 Handling:6.2.1 When installing resin grouts at temperatures below60F (16C
16、) 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 are availa
17、ble 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 surface whic
18、h 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 BedSet th
19、e brick or tile into astiff, moist sand-cement setting bed as described in PracticeC 398. 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 in order
20、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), sulfamic, or p
21、hosphoric, 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 catalyzed therm
22、osettingresin mortar and tamp to permit leveling while maintainingapproximately14 in. (6 mm) wide joints. If service conditionsNOTEThese mechanical mixers are packaged in standard 5-gal pails which serve as the mixing drum. The mixers are available in various horsepowerand rpm for mixing resin morta
23、rs, grouts and monolithics.FIG. 1 Mechanical MixersC 723 98 (2008)2to 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-resistant membrane,depending upon the service conditions or the type of ma
24、terialbeing used.6.4 Grouting Brick or Tile:6.4.1 Grout the brick or tile after the bed has set.6.4.2 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 set; the hi
25、gher 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 mixed resi
26、n 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 from Bric
27、k 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 water-washab
28、le 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 and keepope
29、n 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 be protec
30、tedfrom 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 obtained from th
31、emanufacturer. Chemical resistance of grout may be determinedin accordance with Test Method C 267. 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 the chemic
32、alresistant 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 utilizing
33、the butteringmethod. (See Practice C 399.)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 this stand
34、ard 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 years andi
35、f 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 committee, wh
36、ich 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 723 98 (2008)3
