ASTM C882 C882M-2013a Standard Test Method for Bond Strength of Epoxy-Resin Systems Used With Concrete By Slant Shear《斜切法测定混凝土用环氧树脂粘结剂的粘结强度的标准试验方法》.pdf

1、Designation: C882/C882M 13aStandard Test Method forBond Strength of Epoxy-Resin Systems Used With ConcreteBy Slant Shear1This standard is issued under the fixed designation C882/C882M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision

2、, 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.1. Scope*1.1 This test method covers the determination of the bondstrength of epoxy-resin-base bonding systems for u

3、se withportland-cement concrete. This test method covers bondinghardened concrete to hardened or freshly-mixed concrete.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, each

4、system shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the 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 estab

5、lish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. A specific hazardstatement is given in Section 8.(Warning Fresh hydrauliccementitious mixtures are caustic and may cause chemicalburns to exposed skin and tissue upon prolonged expo

6、sure.2)2. Referenced Documents2.1 ASTM Standards:3C39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars (Using 2-in. or 50-mm CubeSpecimens)C125 Terminology Relating to Concrete and Concrete Ag-grega

7、tesC150 Specification for Portland CementC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC470/C470M Specification for Molds for Forming ConcreteTest Cylinders VerticallyC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in

8、theTesting of Hydraulic Cements and ConcretesC617 Practice for Capping Cylindrical Concrete SpecimensC881/C881M Specification for Epoxy-Resin-Base BondingSystems for Concrete3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification, referto Terminology C125.3.2 Definiti

9、ons of Terms Specific to This Standard:3.2.1 bonding system, nthe product resulting from thecombination of all the components supplied for use as abonding material.3.2.2 component, na constituent that is intended to becombined with one or more other constituents to form abonding system.3.2.3 contact

10、 strength, nbond strength measured by slantshear after a specified contact and cure time.3.2.4 contact time, nspecified time between when thebonding system is applied and when the two segments arebonded together and still achieve a specified bond strengthafter a specified curing time and temperature

11、.3.2.5 formulator, nthe agency responsible for preparingthe separate components and for recommending the propor-tions to be used in preparing the final bonding system.4. Summary of Test Method4.1 The bond strength is determined by using the epoxysystem to bond together two equal sections of a 75 by

12、150-mm3 by 6-in. portland-cement mortar cylinder, each section ofwhich has a diagonally cast bonding area at a 30 angle fromvertical. After suitable curing of the bonding agent, the test isperformed by determining the compressive strength of thecomposite cylinder.1This test method is under the juris

13、diction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.25 on Organic Materials for Bonding.Current edition approved Dec. 1, 2013. Published December 2013. Originallyapproved in 1978. Last previous edition approved in 2013 as C882/C882M13.D

14、OI: 10.1520/C0882_C0882M-13a.2See Section on Safety Precautions, Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards, Vol. 04.02.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandar

15、ds volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Significance and Use5.1 The str

16、ength developed by a bonding system that joinstwo regions of concrete is its most important property.6. Apparatus6.1 Apparatus to Mix Portland-Cement MortarThis appa-ratus shall be as described in Test Method C109/C109M,except for the sections on specimen molds, tamper, and testingmachine.6.2 Specim

17、en MoldsThe molds shall meet the require-ments of Specification C470/C470M and be 75 6 2mm36116 in. in inside diameter and 150 6 2mm66116 in. inheight.6.3 Dummy SectionA dummy section (Fig. 1) shall bemachined of a hard material that is not attacked by portland-cement mortar. It shall fit the mold a

18、nd be equal to half thevolume of the cylinder, but at an angle of 30 from the vertical.Additional dummy sections can be made by casting an epoxy-resin mortar against the machined dummy section contained ina specimen mold. Due precautions, such as waxing, shall betaken to prevent the bonding of the e

19、poxy-resin mortar to themachined dummy section or the mold.6.4 Tamping RodA 10-mm 3/8-in. diameter tampingrod, as described in Practice C192/C192M.6.5 Apparatus for Mixing Epoxy-Resin Bonding SystemAglass, plastic, or metal container of approximately 0.1 L 3 oz.capacity shall be used to hand-mix the

20、 bonding system. Atongue depressor or wooden stick of similar dimensions shallbe used as a paddle.6.6 Testing MachineThe testing machine shall be asdescribed in Test Method C39/C39M.6.7 Moist RoomThe moist room shall conform to therequirements of Specification C511.6.8 Temperature-Conditioning Chamb

21、ersRooms or cham-bers in which the temperature is maintained appropriate to theclass of the resin system being tested, in accordance withSpecification C881/C881M.7. Materials7.1 Portland Cement Mortar Specimens Laboratoryconditions, materials, proportions, and procedures for mixingthe portland-cemen

22、t mortar shall be in accordance with TestMethod C109/C109M. AType III cement (Specification C150)shall be used.7.1.1 Lightly oil the dummy section and the cylinder mold.Position the dummy section in the mold with the slant side up.Place the portland-cement mortar in the mold in two layers ofapproxim

23、ately equal volume. Rod each layer with 25 strokes ofthe tamping rod. Distribute the strokes uniformly over thesection and rod deeply enough to penetrate into any underlyinglayer. Rod the bottom layer as deeply as possible. Strike off thesurface of the top layer with the trowel, and cover the specim

24、enand mold with a glass or metal plate. Cure the mortarhalf-cylinder in accordance with Practice C192/C192M for atleast 28 days. Then dry the half-cylinder in laboratory air for atleast 7 days.As an alternative, a complete 75 by 150 mm 3 by6-in. cylinder shall be cast, cured for at least 28 days, an

25、dsaw-cut at an angle of 30.7.1.2 A 75 by 150-mm 3 by 6-in. cylinder of the mortarshall have a compressive strength, when tested in accordancewith 11.3, of at least 31 MPa 4500 psi at 28-days age (seeNote 1).NOTE 1Calculations for bond strength are determined based on theelliptical bonding surface of

26、 the cut cylinder. For an angle of 30 from thevertical this corresponds to exactly twice the surface area of the base of theassembled cylinder. Use of mortar with the minimum compressivestrength listed in Section 7.1.2 will only provide a qualitative pass/failresult for bond strengths exceeding appr

27、oximately 13 MPa 1900 psi. Ifquantitative results are desired it is recommended the mortar compressivestrength of the mortar exceed the anticipated bond strength by a factor of2.5 or more.7.2 Bonding SystemThe bonding systems covered by thistest method shall be furnished in two or more components fo

28、rcombining immediately prior to use in accordance with thewritten instructions of the manufacturer.7.3 Polyethylene FilmFilm thickness of 100 m 4 milcut into 150 500 mm 6 30 in. sections.7.4 Masking Tape.7.5 Paraffn Wax.8. Hazards8.1 WarningEpoxy resins contain irritants, especially tothe skin, eyes

29、, and respiratory system. 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 withsoa

30、p and water. Solvents shall not be used, because they carrythe irritant into the skin. Cured epoxy resins are innocuous.9. Sampling9.1 Take samples in accordance with Specification C881/C881M.10. Test Specimens10.1 Three composite test specimens are required for allTypes of resin systems.Dimensionsm

31、m in.ADiameter 752 3.00 0.08BHeight 1402 5.60 0.08CSlant height 1502 6.00 0.08DBase height 102 0.40 0.08FIG. 1 Dummy SectionC882/C882M 13a210.2 Conditioning:10.2.1 Types I, III, IV, VI, and VII SystemsCondition theresin system components, the mortar sections, and all equip-ment that will contact the

32、 resin to the temperatures specified inSpecification C881/C881M.10.2.1.1 Prepare the test specimens and make provision formaintaining them at the appropriate temperature during theentire cure time. Prepare the surface to be bonded by sand-blasting and dry brushing to remove all loose surface materia

33、l.10.2.1.2 Use mortar sections and assemblies that have beensoaked in water for 24 h. Place the face of the mortar sectionsto be bonded on an absorbent material for 10 min prior toapplying the adhesive. For assembled test specimens, removeall water by shaking. Allow to air dry for 15 min.10.2.2 Type

34、 II and Type V SystemsSince Type II and TypeV resins are appropriate for use only at temperatures thatpermit strength gain of the freshly prepared concrete, only theconditioning temperature for a Class C resin, 23 6 1C7362 F, need be provided.10.3 Specimen Preparation:10.3.1 Type I, III, IV, VI, and

35、 VII, Grade 2 or 3 SystemsTwo mortar sections will be needed for each test specimen.Wrap 100 m 4 mil of polyethylene film 150 by 500 mm 6by 20 in. around one section of each pair, even with the baseand secure with masking tape. Thoroughly mix the componentsof the bonding system in the proportions re

36、commended by theformulator. A mixing time of 3 min should suffice. Support thefilm-wrapped mortar section so that the prepared bondingsurface is horizontal.10.3.1.1 To test Grade 2 systems, apply a 0.5 mm 0.02 in.layer of the bonding systems to the prepared elliptical surfaceof the film wrapped mort

37、ar section. Using Grade 3 systems,apply a 0.5 mm 0.02 in. layer of bonding system on theprepared elliptical surface of the mortar section not filmwrapped. For the determination of contact strength (Specifica-tion C881/C881M) of Type VI and VII systems, apply a2.0-mm 116-in. layer to the prepared ell

38、iptical surface of bothmortar sections.10.3.1.2 Insert mortar sections not film wrapped into thecylinder formed by film surrounding other mortar sections andsqueeze out the excess resin through a hole, or holes, punchedin the film at the bondline, while keeping the joint horizontal.Secure the assemb

39、ly with sufficient additional masking tapeplaced around the film. Be sure the joint is entirely filled. Keepthe bonded joint horizontal for 48 h, then remove all themasking tape.10.3.2 Type I, III, and IV, Grade 1 SystemsTwo mortarsections will be needed for each test specimen. Prepare theelliptical

40、 bonding surface as described in 10.2. Place the twohalves of the specimen together, forming a gap approximately0.5 mm 0.02 in. Wrap masking tape around the periphery ofthe specimen close to each end. Place additional tape along thejoint. Coat the tape over the joint with hot paraffin to helpcontain

41、 the epoxy when it is poured into the slit. Support thespecimen so that the taped joint is vertical. Cut a slit in the tapeto expose approximately 20 mm 34 in. of the upper portion ofthe joint. Slowly pour the resin bonding system into theexposed joint until it is completely filled. Keep the jointve

42、rtical for 48 h, then remove all masking tape.10.3.3 Type II and V SystemsOne hardened mortar sectionwill be needed for each test specimen. Prepare the mortarsurface as described in 10.2, but do not tape around the edge.Mix the components of the bonding system as described in10.3. Brush the bonding

43、system on the prepared surface. Placethe primed mortar section in the cylinder mold that haspreviously been lined with a 100-m 4-mil polyethylenesheet. Support the mold so that the bonding surface of themortar section is horizontal. Place a layer of freshly mixedportland-cement mortar over the prime

44、d surface to a depth ofapproximately 15 mm 12 in. Rod the layer with the tampingrod gently, so as to disturb the layer of resin as little as possible.Place the mold in its normal vertical position, and placeadditional mortar into the mold in two layers of approximatelyequal volume. Rod each layer wi

45、th 25 strokes of the tampingrod. Distribute the strokes over the cross section, and makethem deep enough to penetrate into the underlying layer. Strikeoff the surface of the top layer with the trowel, and cover themold with a glass or metal plate.10.4 Curing:10.4.1 Type I, III, IV, VI, and VII Syste

46、msMaintain allspecimens at the preparation temperature in a moist room forthe specified period of time.10.4.2 Type II and V SystemsDemold the test specimensand cure in accordance with the curing section of PracticeC192/C192M.11. Procedure11.1 Remove the specimens from the cure environment afterthe s

47、pecified time.11.2 CappingCap the specimens immediately after re-moval from curing in accordance with Practice C617.11.3 Strength TestingTest the specimens at 23 6 1C736 2 F in compression after capping in accordance with TestMethod C39/C39M.12. Calculation12.1 Calculate the bond strength of the res

48、in bondingsystem by dividing the load carried by the specimen at failureby the area of the bonded surface (Note 2). Reduce the area ofthe bonded surface by that of any voids found in the bond oninspection after test. Only voids larger than 3 mm 18 in.should be counted in reducing the area. Report th

49、e results to thenearest 0.1 MPa 10 psi.NOTE 2The area of the elliptical bonding surface of the test cylindersspecified in this test method is 9116 mm214.13 in.2. The actual areashould be based on measuring the lengths of the two axes for the areas ofan ellipse 0.7854 a b13. Report13.1 Report the following information:13.1.1 Identification number,13.1.2 Bond strength,13.1.3 Bonding area,13.1.4 Number and total area of voids in the bond,C882/C882M 13a313.1