1、Designation: C 884/C 884M 98 (Reapproved 2005)Standard Test Method forThermal Compatibility Between Concrete and an Epoxy-Resin Overlay1This standard is issued under the fixed designation C 884/C 884M; the number immediately following the designation indicates the yearof original adoption or, in the
2、 case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) 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
3、test 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 regar
4、ded separately 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 Thi
5、s 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 limitations prior to use. A specific hazardstat
6、ement is given in Section 7.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC 150 Specification for Portland CementC 260 Specification forAir-EntrainingAdmixtures for Con-creteC 672/C 672M Test Method for Scaling Resistance of Con-crete Surfaces Exposed to Deicing
7、 ChemicalsC 778 Specification for SandC 881/C 881M Specification for Epoxy-Resin-Base Bond-ing Systems 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
8、 change between 77F25C and 6F 21C. Cracks near the bond line betweenthe concrete and the epoxy mortar constitute failure of the 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
9、and the pavement, the materialis unsuitable.5. Apparatus5.1 Molds, in conformance with Test Method C 672.5.2 Freezer, in conformance with Test Method C 672,except that the temperature of the freezer shall be 6 6 3F21 6 2C.5.3 Retaining strips, to retain the epoxy-mortar overlay.Pieces of wood or ste
10、el 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 C 150.6.2 Stand
11、ard Sand, meeting the requirements of Specifica-tion C 778.6.3 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 t
12、est method is under the jurisdiction of ASTM Committee C09 onConcrete and ConcreteAggregates, and is the direct responsibility of SubcommitteeC09.25 on Organic Materials for Bonding, Patching, and Sealing.Current edition approved Nov. 1, 2005. Published January 2006. Originallyapproved in 1978. Last
13、 previous edition approved in 1998 as C 884/C 884M 98.2For 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 website.1Copyri
14、ght 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 C 260.7. Hazards7.1 WarningEpoxy resins contain irritants, especially tothe skin, eyes, and respiratory system. Persons h
15、andling 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 shall not be
16、used, because they carrythe irritant into the skin. Cured epoxy resins are consideredinnocuous.8. Sampling8.1 Take samples in accordance with Specification C 881.9. Preparation of Concrete Blocks9.1 ProportionsProportion an air-entrain concrete in ac-cordance with Test Method C 672. Prepare two bloc
17、ks.9.2 Fabrication of Concrete BlockFabricate the concreteblock in accordance with Test Method C 672, except end thefabrication operations after the strike-off operation.9.3 CuringCure the concrete blocks in accordance withTest Method C 672, except that air-drying shall be at least 14days.9.4 Surfac
18、e 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 inner surfaces with a suitable bond
19、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 “loose” volumes (that is, that of the
20、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 in a thin coat. Apply the epoxy mo
21、rtar 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 2F 23 61C. It may benecessary to grind or saw cut the vertical faces so as to have avisible bond line.11. Procedure11.1 After the completio
22、n of the curing period of the epoxymortar, place the two specimens in the freezer for 24 h. Thenremove them to room temperature (73 6 2F 23 61C) for24 h. This is one test cycle. Continue for four additional cycles.12. Interpretation of Results12.1 Delamination of the epoxy-mortar layer from theconcr
23、ete 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 state whether the resin system
24、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 conformance to the criteria forsuccess sp
25、ecified 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 advised that determination of the
26、 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, either reapproved or withdrawn. Your
27、 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. If you feel that your comments
28、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 884/C 884M 98 (2005)2
