1、Designation: C884/C884M 98 (Reapproved 2010)Standard Test Method forThermal Compatibility Between Concrete and an Epoxy-Resin Overlay1This standard is issued under the fixed designation C884/C884M; the number immediately following the designation indicates the yearof original adoption or, in the cas
2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test
3、method covers the determination of whichepoxy-resin formulations are subject to debonding when usedas overlays for concrete when the combination of the two issubjected to temperature changes that may be met in the field.1.2 The values stated in either inch-pound units or SI unitsare to be regarded s
4、eparately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system shallbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.3 This sta
5、ndard 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. A specific hazardstatement
6、 is given in Section 7.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC150 Specification for Portland CementC260 Specification for Air-Entraining Admixtures for Con-creteC672/C672M Test Method for Scaling Resistance of Con-crete Surfaces Exposed to Deicing Chemic
7、alsC778 Specification for SandC881/C881M Specification for Epoxy-Resin-Base BondingSystems for Concrete3. Summary of Test Method3.1 A layer of epoxy-sand mortar is applied to a slab ofcured and dried concrete.After the epoxy has cured, the sampleis subjected to five cycles of temperature change betw
8、een 77 F25 C and 6 F 21 C. Cracks near the bond linebetween the concrete and the epoxy mortar constitute failure ofthe test.4. Significance and Use4.1 This test method applies to materials used in makingepoxy-mortar overlays for concrete pavement. When debond-ing occurs between the overlay and the p
9、avement, the materialis unsuitable.5. Apparatus5.1 Molds, in conformance with Test Method C672/C672M.5.2 Freezer, in conformance with Test Method C672/C672M, except that the temperature of the freezer shall be 66 3 F 21 6 2 C.5.3 Retaining strips, to retain the epoxy-mortar overlay.Pieces of wood or
10、 steel that can be attached to the 12 by 12 by3-in. 300 by 300 by 75-mm concrete block so as to enclosecompletely the top surface of the block and rise above it auniform distance of 0.5 in. 15 mm.6. Materials6.1 Portland Cement, Type I or Type II, meeting therequirements of Specification C150.6.2 St
11、andard Sand, meeting the requirements of Specifica-tion C778.6.3 AggregatesFine and coarse aggregate meeting therequirements of Specification C33. The coarse aggregate shallbe durable under freezing exposure and shall have a maximumsize of 1 in. 25 mm. The fine aggregate shall be a naturalsand.1This
12、 test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.25 on Organic Materials for Bonding.Current edition approved Dec. 15, 2010. Published March 2011. Originallyapproved in 1978. Last previous edition appr
13、oved in 1998 as C884/C884M98(2005). DOI: 10.1520/C0884_C0884M-98R10.2For 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 w
14、ebsite.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.4 Air-Entraining Admixture, meeting the requirements ofSpecification C260.7. Hazards7.1 WarningEpoxy resins contain irritants, especially tothe skin, eyes, and respiratory syst
15、em. Persons handling thesematerials shall use appropriate protective clothing, includingrubber or plastic gloves. If an epoxy resin should contact theskin, it shall be removed immediately with a dry cloth or papertowel, and the area of contact shall be washed thoroughly withsoap and water. Solvents
16、shall not be used, because they carrythe irritant into the skin. Cured epoxy resins are consideredinnocuous.8. Sampling8.1 Take samples in accordance with Specification C881/C881M.9. Preparation of Concrete Blocks9.1 ProportionsProportion an air-entrain concrete in ac-cordance with Test Method C672/
17、C672M. Prepare two blocks.9.2 Fabrication of Concrete BlockFabricate the concreteblock in accordance with Test Method C672/C672M, exceptend the fabrication operations after the strike-off operation.9.3 CuringCure the concrete blocks in accordance withTest Method C672/C672M, except that air-drying sh
18、all be atleast 14 days.9.4 Surface PreparationPrior to the application of theepoxy mortar, sand-blast the top surface of the concrete block,and then remove any loose material with a bristle-brush.10. Fabrication of Test Specimen10.1 Assemble the retaining strips to the concrete blocks.Coat their inn
19、er surfaces with a suitable bond breaker.10.2 Preparation of Epoxy MortarPrepare enough epoxymortar to cover two concrete blocks. Mix the epoxy resin undertest in accordance with the instructions of the manufacturer orformulator. To 1 part by volume of the mixed system add thefollowing bulk or “loos
20、e” volumes (that is, that of the containerin which it is) of standard sand and mix thoroughly:Unfilled FilledGrade 1Grade 2Grade 33 parts2.5 parts2.5 parts2 parts1 part10.3 Application of Epoxy MortarPrime the surface of theconcrete blocks with the recommended primer. Thoroughlybrush on the primer i
21、n a thin coat. Apply the epoxy mortar ina layer flush with the tops of the retaining strips. Remove theretaining strips after 24 h and allow the epoxy mortar to curean additional 6 days at 73 6 2F2361 C. It may benecessary to grind or saw cut the vertical faces so as to have avisible bond line.11. P
22、rocedure11.1 After the completion of the curing period of the epoxymortar, place the two specimens in the freezer for 24 h. Thenremove them to room temperature (73 6 2F2361 C) for24 h. This is one test cycle. Continue for four additional cycles.12. Interpretation of Results12.1 Delamination of the e
23、poxy-mortar layer from theconcrete test block or the presence of horizontal cracks in theconcrete near the interface shall constitute failure. If either ofthe companion specimens has failed, the epoxy-resin systemunder test shall be considered to have failed the test.13. Report13.1 The report shall
24、state whether the resin system haspassed or failed the test.14. Precision and Bias14.1 No statement is made about either precision or the biasof this test method for measuring thermal compatibility be-tween concrete and an epoxy-resin overlay since the resultmerely states whether there is conformanc
25、e to the criteria forsuccess specified in the procedure.15. Keywords15.1 epoxy-resin overlay; thermal compatibilityASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly ad
26、vised 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 andif not revised, eithe
27、r 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, which you may attend.
28、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. Indiv
29、idual 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/).C884/C884M 98 (2010)2
