1、Designation:C882/C882M051Designation: C882/C882M 12Standard 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,
2、 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 Department of Defense.1NOTEThe de
3、signation was changed 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 bond strength of epoxy-resin-base bonding systems for use withportland-cement concrete. This test method covers bonding hardened concr
4、ete to hardened or freshly-mixed concrete.1.2 The values stated in either inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within thetext, the SI units are shown in brackets. The values stated in each system aremay not be exact equivalents; therefore, each systemsh
5、all be used independently of the other. Combining values from the two systems may result in non-conformance with this testmethod. the standard.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 standa
6、rd to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. A specific hazard statement is given in Section 8. . (Warning Fresh hydraulic cementitious mixturesare caustic and may cause chemical burns to exposed skin and tissue upon p
7、rolonged exposure.2)2. Referenced Documents2.1 ASTM Standards:3C39/C39M Test Method for Compressive Strength of Cylindrical Concrete SpecimensC109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)C125 Terminology Relating to Concrete and Con
8、crete AggregatesC150 Specification for Portland CementC192/C192M Practice for Making and Curing Concrete Test Specimens in the LaboratoryC511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing ofHydraulic Cements and ConcretesC617 Practice for Ca
9、pping Cylindrical Concrete SpecimensC881/C881M Specification for Epoxy-Resin-Base Bonding Systems for Concrete3. Terminology3.1See Section on Terminology of Specification C881/C881M3.1 Definitions:3.1.1 For definitions of terms used in this specification, refer to Terminology C125.3.2 Definitions of
10、 Terms Specific to This Standard:3.2.1 bonding system, nthe product resulting from the combination of all the components supplied for use as a bondingmaterial.1This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Sub
11、committee C09.25 onOrganic Materials for Bonding.Current edition approved Nov. 1, 2005. Published November 2005. Originally approved in 1978. Last previous edition approved in 1999 as C88299. DOI:10.1520/C0882_C0882M-05E01.Current edition approved May 1, 2012. Published June 2012. Originally approve
12、d in 1978. Last previous edition approved in 2005 as C882/C882M051. DOI:10.1520/C0882_C0882M-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Docum
13、ent Summary page on the ASTM website.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, or contact ASTM Customer Service at serviceastm.org. For Annual Book of A
14、STM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This 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
15、 possible to adequately 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C70
16、0, West Conshohocken, PA 19428-2959, United States.3.2.2 component, na constituent that is intended to be combined with one or more other constituents to form a bondingsystem.3.2.3 contact strength, nbond strength measured by slant shear after a specified contact and cure time.3.2.4 contact time, ns
17、pecified time between when the bonding system is applied and when the two segments are bondedtogether and still achieve a specified bond strength after a specified curing time and temperature.3.2.5 formulator, nthe agency responsible for preparing the separate components and for recommending the pro
18、portions tobe used in preparing the final bonding system.4. Summary of Test Method4.1 The bond strength is determined by using the epoxy system to bond together two equal sections of a 375 by 6-in. 75150-mm3 by 150-mm6-in. portland-cement mortar cylinder, each section of which has a diagonally cast
19、bonding area at a 30 angle fromvertical. After suitable curing of the bonding agent, the test is performed by determining the compressive strength of the compositecylinder.5. Significance and Use5.1 The strength developed by a bonding system that joins two regions of concrete is its most important p
20、roperty.6. Apparatus6.1 Apparatus to Mix Portland-Cement MortarThis apparatus shall be as described in Test Method C109/C109M, except forthe sections on specimen molds, tamper, and testing machine.6.2 Specimen MoldsThe molds shall be constructed in the form of right cylinders, 375 6 in. 752 mm 3 6 2
21、 mm116 in.in inside diameter and 6150 6 in. 1502 mm 6 6 2 mm116 in. high. All molds shall be either selected or machined so that themaximum range of the differences in each of the dimensions of the group of molds is less than in. 0.5 mm.0.5 mm 164 in. Themolds shall be made of metal not attacked by
22、portland-cement mortar. The side of the mold shall be sufficiently rigid to preventspreading or warping. The molds shall be made watertight before use. A satisfactory material for this purpose is the paraffin-rosinmixture described in Test Method C109/C109M.6.3 Dummy SectionA dummy section (Fig. 1)
23、shall be machined of a hard material that is not attacked by portland-cementmortar. It shall fit the mold and be equal to half the volume of the cylinder, but at an angle of 30 from the vertical. Additionaldummy sections can be made by casting an epoxy-resin mortar against the machined dummy section
24、 contained in a specimen mold.Due precautions, such as waxing, shall be taken to prevent the bonding of the epoxy-resin mortar to the machined dummy sectionor the mold.6.4 Tamping RodThe tamping rod shall be a round rod of brass or plastic, in. 10 mm10 mm 38 in. in diameter andapproximately 12 in. 3
25、00 mm long, having both ends rounded to hemispherical tips.6.5 Apparatus for Mixing Epoxy-Resin Bonding SystemA glass, plastic, or metal container of approximately 3 oz. 0.1 L0.1L 3 oz. capacity shall be used to hand-mix the bonding system. A tongue depressor or wooden stick of similar dimensions sh
26、allbe used as a paddle.Dimensionsmm in.mmmm in.ADiameter 3.000 7562ADiameter 7562 3.000BHeight 5.598 14062BHeight 14062 5.598CSlant height 6.000 15062CSlant height 15062 6.000DBase height 0.402 1062DBase height 1062 0.402FIG. 1 Dummy SectionC882/C882M 1226.6 Testing MachineThe testing machine shall
27、be as described in Test Method C39/C39M.6.7 Moist RoomThe moist room shall conform to the requirements of Specification C511.6.8 Temperature-Conditioning Chambers Rooms or chambers in which the temperature is maintained appropriate to the classof the resin system being tested, in accordance with Spe
28、cification C881/C881M.7. Materials7.1 Laboratory conditions, materials, proportions, and procedures for mixing the portland-cement mortar shall be in accordancewith Test Method C109/C109M. A Type III cement (Specification C150) shall be used.7.2 Lightly oil the dummy section and the cylinder mold. P
29、osition the dummy section in the mold with the slant side up. Placethe portland-cement mortar in the mold in three layers of approximately equal volume. Rod each layer with 25 strokes of thetamping rod. Distribute the strokes uniformly over the section and rod deeply enough to penetrate into any und
30、erlying layer. Rodthe bottom layer as deeply as possible. Strike off the surface of the top layer with the trowel, and cover the specimen and moldwith a glass or metal plate. Cure the mortar half-cylinder in accordance with Practice C192/C192M for at least 28 days. Then drythe half-cylinder in labor
31、atory air for at least 7 days. As an alternative, a complete 375 by 6-in. 75 150 mm 3 by 150 mm 6-in.cylinder shall be cast and, after cure, may be saw-cut at an angle of 30.7.3A3 7.3 A 75 by 6-in. 75150-mm 3 by 150-mm6-in. cylinder of the mortar shall have a compressive strength, when testedin acco
32、rdance with 11.3, of at least 4500 psi 31 MPa at 28-days age. , of at least 31 MPa 4500 psi at 28-days age.8. Hazards8.1 WarningEpoxy resins contain irritants, especially to the skin, eyes, and respiratory system. Persons handling thesematerials shall use appropriate protective clothing, including r
33、ubber 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 not be used, because they carry the irritant into the skin. Cured epoxy resins are
34、 innocuous.9. Sampling9.1 Take samples in accordance with Specification C881/C881M.10. Test Specimens10.1 Three composite test specimens are required for all Types of resin systems.10.2 Conditioning:10.2.1 Types I, III, IV, VI, and VII SystemsCondition the resin system components, the mortar section
35、s, and all equipment thatwill contact the resin to the temperatures specified in Specification C881/C881M.10.2.1.1 Prepare the test specimens and make provision for maintaining them at the appropriate temperature during the entirecure time. Prepare the surface to be bonded by sandblasting and dry br
36、ushing to remove all loose surface material.10.2.1.2 Use mortar sections and assemblies that have been soaked in water for 24 h. Place the face of the mortar sections tobe bonded on an absorbent material for 10 min prior to applying the adhesive. For assembled test specimens, remove all water byshak
37、ing. Allow to air dry for 15 min.10.2.2 Type II and Type V SystemsSince Type II and Type V resins are appropriate for use only at temperatures that permitstrength gain of the freshly prepared concrete, only the conditioning temperature for a Class C resin, 7323 6 2 F 231 C 736 1 C,2 F, need be provi
38、ded.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 4mil (100 m)100 m 4 mil of polyethylene film 6150 by 20 in. 150500 mm 6 by 500 mm20 in. around one section of eachpair, even with the base and secure
39、 with masking tape. Thoroughly mix the components of the bonding system in the proportionsrecommended by the formulator. A mixing time of 3 min should suffice. Support the film-wrapped mortar section so that theprepared bonding surface is horizontal.10.3.1.1 To test Grade 2 systems, apply a 0.02 in.
40、 0.5 mm0.5 mm 0.02 in. layer of the bonding systems to the preparedelliptical surface of the film wrapped mortar section. Using Grade 3 systems, apply a 0.02 in. 0.5 mm0.5 mm 0.02 in. layer ofbonding system on the prepared elliptical surface of the mortar section not film wrapped. For the determinat
41、ion of contact strength(Specification C881/C881M) of Type VI and VII systems, apply a -in. 2.0-mm2.0-mm 116-in. layer to the prepared ellipticalsurface of both mortar sections.10.3.1.2 Insert mortar sections not film wrapped into the cylinder formed by film surrounding other mortar sections and sque
42、ezeout the excess resin through a hole, or holes, punched in the film at the bondline, while keeping the joint horizontal. Secure theassembly with sufficient additional masking tape placed around the film. Be sure the joint is entirely filled. Keep the bonded jointhorizontal for 48 h, then remove al
43、l the masking tape.10.3.2 Type I, III, and IV, Grade 1 SystemsTwo mortar sections will be needed for each test specimen. Prepare the ellipticalbonding surface as described in 10.2. Place the two halves of the specimen together, forming a gap approximately 0.02 in. 0.5mm.0.5 mm 0.02 in. Wrap masking
44、tape around the periphery of the specimen close to each end. Place additional tape alongthe joint. Coat the tape over the joint with hot paraffin to help contain the epoxy when it is poured into the slit. Support the specimenC882/C882M 123so that the taped joint is vertical. Cut a slit in the tape t
45、o expose approximately in. (20 mm)20 mm 34 in. of the upper portionof the joint. Slowly pour the resin bonding system into the exposed joint until it is completely filled. Keep the joint vertical for48 h, then remove all masking tape.10.3.3 Type II and V SystemsOne hardened mortar section will be ne
46、eded for each test specimen. Prepare the mortar surfaceas described in 10.2, but do not tape around the edge. Mix the components of the bonding system as described in 10.3. Brush thebonding system on the prepared surface. Place the primed mortar section in the cylinder mold that has previously been
47、lined witha 4-mil (100-m)100-m 4-mil polyethylene sheet. Support the mold so that the bonding surface of the mortar section ishorizontal. Place a layer of freshly mixed portland-cement mortar over the primed surface to a depth of approximately in. 15mm.15 mm 12 in. Rod the layer with the tamping rod
48、 gently, so as to disturb the layer of resin as little as possible. Place themold in its normal vertical position, and place additional mortar into the mold in two layers of approximately equal volume. Rodeach layer with 25 strokes of the tamping rod. Distribute the strokes over the cross section, a
49、nd make them deep enough topenetrate into the underlying layer. Strike off the surface of the top layer with the trowel, and cover the mold with a glass or metalplate.10.4 Curing:10.4.1 Type I, III, IV, VI, and VII SystemsMaintain all specimens at the preparation temperature in a moist room for thespecified period of time.10.4.2 Type II and V SystemsDemold the test specimens and cure in accordance with the curing section of PracticeC19
