1、Designation: C884/C884M 98 (Reapproved 2010)C884/C884M 16Standard 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 o
2、r, in the case 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 U.S. Department of Defense.1. S
3、cope Scope*1.1 This test method covers the determination of which epoxy-resin formulations are subject to debonding when used asoverlays for concrete when the combination of the two is subjected to temperature changes that may be met in the field.1.2 UnitsThe values stated in either inch-poundSI uni
4、ts or SIinch-pound units are to be regarded separately as standard.Within the text, the SI units are shown in brackets. The values stated in each system aremay not be exact equivalents; therefore,each system shall be used independently of the other. Combining values from the two systems may result i
5、n nonconformancenon-conformance with the specification.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability
6、of regulatorylimitations prior to use.Aspecific hazard statement is given in Section 78. . (WarningFresh hydraulic cementitious mixtures arecaustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure.)22. Referenced Documents2.1 ASTM Standards:3C33C33/C33M Specification f
7、or Concrete AggregatesC125 Terminology Relating to Concrete and Concrete AggregatesC150C150/C150M Specification for Portland CementC260C260/C260M Specification for Air-Entraining Admixtures for ConcreteC672/C672M Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing ChemicalsC77
8、8 Specification for Standard SandC881/C881M Specification for Epoxy-Resin-Base Bonding Systems for Concrete3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method, refer to Terminology C125.4. Summary of Test Method4.1 A layer of epoxy-sand mortar is applied to a slab o
9、f cured and dried concrete. After the epoxy has cured, the sample issubjected to five cycles of temperature change between 77 F 25 C and 6 F 21 C. 23C 73.5F and 21C 6F.Cracks near the bond line between the concrete and the epoxy mortar constitute failure of the test.5. Significance and Use5.1 This t
10、est method applies to materials used in making epoxy-mortar overlays for concrete pavement. WhenIf debondingoccurs between the overlay and the pavement, the material is unsuitable.1 This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregatesand is the direct
11、responsibility of Subcommittee C09.25 onOrganic Materials for Bonding.Current edition approved Dec. 15, 2010July 1, 2016. Published March 2011August 2016. Originally approved in 1978. Last previous edition approved in 19982010 asC884/C884M98(2005).C884/C884M98(2010). DOI: 10.1520/C0884_C0884M-98R10.
12、10.1520/C0884_C0884M-16.2 See Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol. 04.02.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsv
13、olume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to ad
14、equately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright AST
15、M International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 This test method evaluates the ability of an overlay to remain bonded to a concrete substrate during repeated thermal cyclingin air over a significant temperature range and is not intended to dup
16、licate temperature fluctuations in the field.6. Apparatus6.1 Molds, in conformance with Test Method C672/C672M.6.2 Freezer, in conformance with Test Method C672/C672M, except that the temperature of the freezer shall be 6 6 3 F 216 2 C.be 21 6 2C 6 6 3F.6.3 Retaining strips, to retain the epoxy-mort
17、ar overlay. Pieces of wood or steel that can be attached to the 12300 by 12 by 3-in.300 by 300 by 75-mm 300 by 75 mm 12 by 12 by 3-in. concrete block so as to enclose completely the top surface of the blockand rise above it a uniform distance of 0.5 in. 15 mm.15 mm 0.5 in.7. Materials7.1 Portland Ce
18、ment, Type I or Type II, meeting the requirements of Specification C150C150/C150M.7.2 Standard Sand, meeting the requirements of Specification C778.7.3 AggregatesFine and coarse aggregate meeting the requirements of Specification C33C33/C33M. The coarse aggregateshall be durable under freezing expos
19、ure and shall have a maximum size of 1 in. 25 mm.25 mm 1 in. The fine aggregate shallbe a natural sand.7.4 Air-Entraining Admixture, meeting the requirements of Specification C260C260/C260M.8. Hazards8.1 WarningEpoxy resins contain irritants, especially to the skin, eyes, and respiratory system. Per
20、sons handling thesematerials shall use appropriate protective clothing, including rubber or plastic gloves. If an epoxy resin should contact the skin,it shall be removed immediately with a dry cloth or paper towel, and the area of contact shall be washed thoroughly with soap andwater. Solvents shall
21、 not be used, because they carry the irritant into the skin. Cured epoxy resins are considered innocuous.9. Sampling9.1 Take samples in accordance with Specification C881/C881M.10. Preparation of Concrete Blocks10.1 ProportionsProportion an air-entrain concrete in accordance with Test Method C672/C6
22、72M. Prepare two blocks.10.2 Fabrication of Concrete BlockBlocksFabricate the concrete blockblocks in accordance with Test Method C672/C672M, except end the fabrication operations after the strike-off operation.10.3 CuringCure the concrete blocks in accordance with Test Method C672/C672M, except tha
23、t air-drying shall be at least14 days.10.4 Surface PreparationPrior to the application of the epoxy mortar, sand-blast the top surface of the concrete block, andthen remove any loose material with a bristle-brush.11. Fabrication of Test Specimen11.1 Assemble the retaining strips to the concrete bloc
24、ks. Coat their inner surfaces with a suitable bond breaker.11.2 Preparation of Epoxy MortarPrepare enough epoxy mortar to cover two concrete blocks. Mix the epoxy resin under testin accordance with the instructions of the manufacturer or formulator. To 1 part by volume of the mixed system add the fo
25、llowingbulk or “loose” volumes (that is, that of the container in which it is) of standard sand and mix thoroughly:Unfilled FilledGrade 1Grade 2Grade 33 parts2.5 parts2.5 parts2 parts1 part11.3 Application of Epoxy MortarPrime the surface of the concrete blocks with the recommended primer. Thoroughl
26、y brushon the primer in a thin coat. Apply the epoxy mortar in a layer flush with the tops of the retaining strips. Remove the retainingstrips after 24 hhours and allow the epoxy mortar to cure an additional 6 days at 73 6 2 F 23 61 C. 23 6 1C 73.5 6 2F.It may be necessary to grind or saw cut the ve
27、rtical faces so as to have a visible bond line.12. Procedure12.1 After the completion of the curing period of the epoxy mortar, place the two specimens in the freezer for 24 h.hours. Thenremove them to room temperature (73 6 2 F 23 61 C) for 24 h.temperature, 23 6 2C 73.5 6 3.5F, for 24 hours. This
28、isone test cycle. Continue for four additional cycles.C884/C884M 16213. Interpretation of Results13.1 Delamination of the epoxy-mortar layer from the concrete test block or the presence of horizontal cracks in the concretenear the interface shall constitute failure. If either of the companion specim
29、ens has failed, the epoxy-resin system under test shallbe considered to have failed the test.14. Report14.1 The report shall identify the epoxy-resin system and state whether the resin system has passed or failed the test.15. Precision and Bias15.1 Precision and BiasNo statementinformation is madepr
30、esented about either precision or the bias of this test method formeasuring thermal compatibility between concrete and an epoxy-resin overlay since the result merely states whether there isconformance to the criteria for success specified in the procedure.because the test result is not quantitative.
31、16. Keywords16.1 epoxy-resin overlay; thermal compatibilitySUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this standard since the last issue(C884/C884M-98 (2010) that may impact the use of this standard. (Approved July 1, 2016.)(1) Revised Sections 1 and 15.(2) Ad
32、ded Sections 3 and 5.2.ASTM 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 validity of any such patent rights, and the riskof infringem
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