1、Designation: C 882/C 882M 05e1Standard Test Method forBond Strength of Epoxy-Resin Systems Used With ConcreteBy Slant Shear1This standard is issued under the fixed designation C 882/C 882M; the number immediately following the designation indicates the yearof original adoption or, in the case of rev
2、ision, 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.e1NOTEThe designation was cha
3、nged editorially to agree with the existing values statement in the Scope in March 2008.1. Scope1.1 This test method covers the determination of the bondstrength of epoxy-resin-base bonding systems for use withportland-cement concrete. This test method covers bondinghardened concrete to hardened or
4、freshly-mixed concrete.1.2 The values stated in either inch-pound units or SI unitsare to be regarded 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.
5、 Combining values from thetwo systems may result in nonconformance with this testmethod.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 establish appro-priate safety and health practices
6、 and determine the applica-bility of regulatory limitations prior to use. A specific hazardstatement is given in Section 8.2. Referenced Documents2.1 ASTM Standards:2C 39/C 39M Test Method for Compressive Strength of Cy-lindrical Concrete SpecimensC 109/C 109M Test Method for Compressive Strength of
7、Hydraulic Cement Mortars (Using 2-in. or 50-mm CubeSpecimens)C 150 Specification for Portland CementC 192/C 192M Practice for Making and Curing ConcreteTest Specimens in the LaboratoryC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms and Water Storage Tanks Used in the Testingof Hydrau
8、lic Cements and ConcretesC 617 Practice for Capping Cylindrical Concrete Speci-mensC 881/C 881M Specification for Epoxy-Resin-Base Bond-ing Systems for Concrete3. Terminology3.1 See Section on Terminology of Specification C 881/C 881M.4. Summary of Test Method4.1 The bond strength is determined by u
9、sing the epoxysystem to bond together two equal sections ofa3by6-in. 75by 150-mm 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 streng
10、th of thecomposite cylinder.5. Significance and Use5.1 The strength developed by a bonding system that joinstwo regions of concrete is its most important property.6. Apparatus6.1 Apparatus to Mix Portland-Cement MortarThis ap-paratus shall be as described in Test Method C 109/C 109M,except for the s
11、ections on specimen molds, tamper, and testingmachine.6.2 Specimen MoldsThe molds shall be constructed in theform of right cylinders, 3 6116 in. 75 6 2 mm in insidediameter and 6 6116 in. 150 6 2 mm high. All molds shallbe either selected or machined so that the maximum range ofthe differences in ea
12、ch of the dimensions of the group of moldsis less than164 in. 0.5 mm. The molds shall be made of metalnot attacked by portland-cement mortar. The side of the moldshall be sufficiently rigid to prevent spreading or warping. Themolds shall be made watertight before use. A satisfactory1This test method
13、 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 Nov. 1, 2005. Published November 2005. Originallyapproved in 1978. Last previous edition approved in 19
14、99 as C 882 99.2For 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.1Copyright ASTM International, 100 Barr Harbor
15、 Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.material for this purpose is the paraffin-rosin mixture describedin Test Method C 109/C 109M.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
16、 the mold and 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 bondi
17、ng of the epoxy-resin mortar to themachined dummy section or the mold.6.4 Tamping RodThe tamping rod shall be a round rod ofbrass or plastic,38 in. 10 mm in diameter and approximately12 in. 300 mm long, having both ends rounded to hemispheri-cal tips.6.5 Apparatus for Mixing Epoxy-Resin Bonding Syst
18、emAglass, plastic, or metal container of approximately 3 oz. 0.1 Lcapacity shall be used to hand-mix the 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 C 39/C 39M.6.7 Moist Ro
19、omThe moist room shall conform to therequirements of Specification C511.6.8 Temperature-Conditioning Chambers Rooms orchambers in which the temperature is maintained appropriateto the class of the resin system being tested, in accordance withSpecification C 881/C 881M.7. Materials7.1 Laboratory cond
20、itions, materials, proportions, and pro-cedures for mixing the portland-cement mortar shall be inaccordance with Test Method C 109/C 109M. A Type IIIcement (Specification C 150) shall be used.7.2 Lightly oil the dummy section and the cylinder mold.Position the dummy section in the mold with the slan
21、t side up.Place the portland-cement mortar in the mold in three layers ofapproximately 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 possi
22、ble. Strike off thesurface of the top layer with the trowel, and cover the specimenand mold with a glass or metal plate. Cure the mortarhalf-cylinder in accordance with Practice C 192/C 192M for atleast 28 days. Then dry the half-cylinder in laboratory air for atleast 7 days.As an alternative, a com
23、plete 3 by 6-in. 75 by 150mm cylinder shall be cast and, after cure, may be saw-cut atan angle of 30.7.3 A3 by 6-in. 75 by 150-mm cylinder of the mortar shallhave a compressive strength, when tested in accordance with11.3, of at least 4500 psi 31 MPa at 28-days age.8. Hazards8.1 WarningEpoxy resins
24、contain irritants, especially tothe skin, eyes, 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
25、 of contact shall be washed thoroughly withsoap 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 C 881/C 881M.10. Test Specimens10.1 Three composite test specimens are re
26、quired for allTypes of resin systems.10.2 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 resin to the temperatures specified inSpecification C 881/C 881M.10.2.1.1 Prepare the test specimens
27、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 material.10.2.1.2 Use mortar sections and assemblies that have beensoaked in water for 24 h. Place the face
28、 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 II and Type V SystemsSince Type II and TypeV resins are appropriate for use only at temperatures th
29、atpermit strength gain of the freshly prepared concrete, only theconditioning temperature for a Class C resin, 73 6 2F2361 C, need be provided.10.3 Specimen Preparation:10.3.1 Type I, III, IV, VI, and VII, Grade 2 or 3 SystemsTwo mortar sections will be needed for each test specimen.Wrap 4 mil (100
30、m) of polyethylene film 6 by 20 in. 150 by500 mm around one section of each pair, even with the baseand secure with masking tape. Thoroughly mix the componentsof the bonding system in the proportions recommended by theformulator. A mixing time of 3 min should suffice. Support thefilm-wrapped mortar
31、section so that the prepared bondingsurface is horizontal.Dimensionsin. mmADiameter 3.000 7562BHeight 5.598 14062CSlant height 6.000 15062DBase height 0.402 1062FIG. 1 Dummy SectionC 882/C 882M 05e1210.3.1.1 To test Grade 2 systems, apply a 0.02 in. 0.5 mmlayer of the bonding systems to the prepared
32、 elliptical surfaceof the film wrapped mortar section. Using Grade 3 systems,apply a 0.02 in. 0.5 mm layer of bonding system on theprepared elliptical surface of the mortar section not filmwrapped. For the determination of contact strength (Specifica-tion C 881/C 881M) of Type VI and VII systems, ap
33、ply a116-in. 2.0-mm layer to the prepared elliptical 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 k
34、eeping the joint horizontal.Secure the assembly 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
35、for each test specimen. Prepare theelliptical bonding surface as described in 10.2. Place the twohalves of the specimen together, forming a gap approximately0.02 in. 0.5 mm. Wrap masking tape around the periphery ofthe specimen close to each end. Place additional tape along thejoint. Coat the tape o
36、ver the joint with hot paraffin to helpcontain 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 approximately34 in. (20 mm) of the upper portion ofthe joint. Slowly pour the resin bonding system into theexposed joint
37、until it is completely filled. Keep the jointvertical 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
38、 system as described in10.3. Brush the bonding system on the prepared surface. Placethe primed mortar section in the cylinder mold that haspreviously been lined with a 4-mil (100-m) polyethylenesheet. Support the mold so that the bonding surface of themortar section is horizontal. Place a layer of f
39、reshly mixedportland-cement mortar over the primed surface to a depth ofapproximately12 in. 15 mm. 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 layer
40、s of approximatelyequal volume. Rod each layer with 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
41、 Curing:10.4.1 Type I, III, IV, VI, and VII SystemsMaintain 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 PracticeC 192/C 192M.11. Procedure11.1 Remove
42、 the specimens from the cure environment afterthe specified time.11.2 CappingCap the specimens immediately after re-moval from curing in accordance with Practice C 617.11.3 Strength TestingTest the specimens at 73 6 2F236 1 C in compression after capping in accordance with TestMethod C 39/C 39M.12.
43、Calculation12.1 Calculate the bond strength of the resin bondingsystem by dividing the load carried by the specimen at failureby the area of the bonded surface (Note 1). Reduce the area ofthe bonded surface by that of any voids found in the bond oninspection after test. Only voids larger than18 in.
44、3 mmshould be counted in reducing the area. Report the results to thenearest 10 psi (0.1 MPa).NOTE 1The area of the elliptical bonding surface of the test cylindersspecified in this test method is 14.13 in.29116 mm2. The actual areashould be based on measuring the lengths of the two axes for the are
45、as 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,13.1.5 Type and position of the fracture (in the bondingmaterial, in the mortar, or in the interface betwe
46、en them), and13.1.6 Defects in either the specimen or the cap.14. Precision and Bias14.1 PrecisionThe standard deviation was found to be365 psi for the 14 day bond strength average of 1790 psi.Therefore, results of two properly conducted tests from twolaboratories on similar batches should not diffe
47、r from eachother by more than 1022 psi.14.2 BiasThis test method has no bias since the valuesdetermined can only be defined in terms of this test method.15. Keywords15.1 adhesives; bonding agents; bond strength; shear bondC 882/C 882M 05e13ASTM International takes no position respecting the validity
48、 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 infringement of such rights, are entirely their own responsibility.This standard is subject
49、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 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 have not received a fair hearing you
