1、Designation: C579 01 (Reapproved 2012)C579 18Standard Test Methods forCompressive Strength of Chemical-Resistant Mortars,Grouts, Monolithic Surfacings, and Polymer Concretes1This standard is issued under the fixed designation C579; the number immediately following the designation indicates the year
2、oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Depar
3、tment of Defense.1. Scope1.1 These test methods cover the determination of the compressive strength of chemical-resistant mortars, grouts, monolithicsurfacings, and polymer concretes. These materials may be based on resin, silicate, silica, or sulfur binders.1.2 Test MethodAoutlines the testing proc
4、edure generally used for systems containing aggregate less than 0.0625 in. (1.6 mm)in size. Test Method B covers the testing procedure generally used for systems containing aggregate from 0.0625 to 0.4 in. (1.6to 10 mm) in size. Test Method C is used for systems containing aggregate larger than 0.4
5、in.1.3 These test methods provide two different methods for controlling the testing rate.1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered sta
6、ndard.1.5 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 safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitat
7、ions prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Techni
8、cal Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C470/C470M Specification for Molds for Forming Concrete Test Cylinders VerticallyC904 Terminology Relating to Chemical-Resistant Nonmetallic MaterialsE4 Practices for Force Verification of Testing MachinesE177 Practice
9、for Use of the Terms Precision and Bias in ASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method3. Terminology3.1 DefinitionsFor definitions of terms used in these test methods, see Terminology C904.4. Significance and Use4.1 These test me
10、thods offer a means of determining the compressive strength of chemical-resistant mortars, grouts, monolithicsurfacings, and polymer concretes.5. Apparatus5.1 Equipment, capable of weighing materials or specimens to 60.3 % accuracy.5.2 Specimen Molds:1 These test methods are under the jurisdiction o
11、f ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and are the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved Aug. 1, 2012July 1, 2018. Published September 2012November 2018. Originally approved in 1968. Last previo
12、us edition approved in 20062012as C579 01 (2006).(2012). DOI: 10.1520/C0579-01R12.10.1520/C0579-18.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standardsstand
13、ards 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 adequately depict all changes accuratel
14、y, 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 C700, West Conshohocken, PA 19428-2959. United States15
15、.2.1 Test Method AThese molds shall be right cylinder 1 6 132 in. (25 6 0.8 mm) in diameter by 1 6 132 in. high. The moldsmay be constructed in any manner that will allow formation of a test specimen of the desired size. Typical molds consist of a 1-in.thick, flat plastic sheet in which 1-in. diamet
16、er, smooth-sided holes have been cut, and to the bottom of which a 14-in. (6-mm) thick,flat plastic sheet (without matching holes) is attached by means of screws or bolts. Alternately, the molds may consist of sectionsof round plastic tubing or pipe, 1-in. inside diameter and 1 in. long, having suff
17、icient wall thickness to be rigid and retaindimensional stability during the molding operation, and a 14-in. thick, flat plastic sheet on which one open end of each section canbe rested. With the latter style of mold, the tubing segment may be sealed with a material, such as caulking compound or sto
18、pcockgrease. For most types of specimens it is satisfactory to simply seal one end of the tubing segment with masking tape.NOTE 1For use with sulfur mortars an additional piece of flat plastic sheet at least 18 in. (3 mm) thick containing a 14-in. (6-mm) hole and a sectionof plastic tubing or pipe 1
19、 in. (25 mm) in diameter by 1 in. high are required. They are used to form a pouring gate and reservoir in the preparation ofsulfur mortar specimens.5.2.2 Test Method BMolds for the 2 in. (50 mm) cube specimens shall be tight fitting and leakproof. The molds shall havenot more than three cube compar
20、tments and shall be separable into not more than three parts. The parts of the molds, whenassembled, shall be positively held together. The molds shall be made of materials not attacked by the product being tested. Thesides of the molds shall be sufficiently rigid to prevent spreading or warping. Th
21、e interior faces of the molds shall be manufacturedto ensure plane surfaces with a permissible variation of 0.002 in. (0.05 mm). The distances between opposite faces shall be 2 6116 in. (50 6 0.8 mm). The height of the molds, measured separately for each cube compartment, shall be 2 6 116 in. The an
22、glebetween adjacent interior faces and between interior faces and top and bottom planes of the mold shall be 90 6 0.5 measuredat points slightly removed from the intersection of the faces.5.2.3 Test Method CMolds shall be right cylinders made of heavy gage metal or other rigid nonabsorbent material.
23、 Thecylinder diameter shall be at least four times the nominal maximum aggregate size in the mix. The minimum cylinder diametershall be 2 in. (50 mm). The cylinder height shall be two times the diameter. The plane of the rim of the mold shall be at right anglesto the axis within 0.5. The mold shall
24、be at right angles to the axis within 0.5. The mold shall not vary from the prescribeddiameter by more than 116 in. (1.5 mm) nor from the prescribed height by more than 18 in. (3 mm). Molds shall be provided witha flat base plate with a means for securing it to the mold at a right angle to the axis
25、of the cylinder in the instance of reusable metalmolds. For molds other than metal, a mechanically attached smooth flat metal or integrally molded flat bottom of the same material,as the sides shall be used. Single-use molds shall conform to Specification C470/C470M.NOTE 2The material from which the
26、 mold is constructed must be chemically inert and have antistick properties. Polyethylene, polypropylene,polytetrafluorethylene, and metal forms having either a sintered coating of tetrafluoroethylene or a suitable release agent compatible with the materialbeing tested are satisfactory. Because of t
27、heir superior heat resistance, only trifluorochloroethylene and tetrafluoroethylene mold release agents should beused with sulfur materials.5.3 The testing machine may be of any type of sufficient capacity which will provide the rates of loading prescribed. It shallhave been verified to have an accu
28、racy of 1.0 %, or better, within twelve months of the time of use in accordance with PracticesE4. The testing machine shall be equipped with two steel bearing blocks with hardened faces, one of which is a spherically seatedblock that will bear on the top bearing plate, and the other a plain rigid bl
29、ock that will support the bottom bearing plate. Thediameter of the spherical bearing block shall be at least 75 % of the width of the specimen. The bearing faces shall not depart froma plane by more than 0.001 in. (0.025 mm) in any 6-in. (150-mm) diameter circle.6. Test Specimens6.1 Make all specime
30、ns for a single determination from a single mix.6.2 Test Method APrepare test specimens to be used in accordance with Test Method A as described in 6.5. Test specimensshall be right cylinders 1 + 132, 116 in. (25 + 0.8, 1.6 mm) in diameter by 1 6 116 in. (25 6 1.6 mm) high. If the faces of thespecim
31、en are not flat, smooth, and normal to the cylinder axis, they may be sanded, ground, or machined to specification. Exercisecare that the frictional heat developed during such operations does not damage the specimens.6.3 Test Method BPrepare test specimens to be used in accordance with Test Method B
32、 as described in 6.5. Test specimensshall be cubes with dimensions of 2 + 116, 18 in. (50 + 1.5, 3.0 mm). If the faces of the cube are not flat, smooth, and normalto each other, they may be sanded, ground, or machined to specification. Exercise care that the frictional heat developed duringsuch oper
33、ations does not damage the specimens.6.4 Test Method CPrepare test specimens to be used in accordance with Test Method C as described in 6.6.6.4.1 Do not test specimens if any individual diameter of a cylinder differs from any other diameter of the same cylinder bymore than 2 %.6.4.2 Neither end of
34、compressive test specimens, when tested, shall depart from perpendicular to the axis by more than 0.5(approximately equivalent to 18 in. in 12 in. (3 mm in 300 mm). Cap the ends of compression test specimens that are not flat within0.002 in. (0.05 mm) in accordance with 6.6, sawed or ground. Determi
35、ne the diameter used for calculating the cross-sectional areaof the test specimen to the nearest 0.01 in. (0.25 mm) by averaging two diameters measured at right angles to each other at aboutmid-height of the specimen.6.5 Specimen Preparation for Test Methods A and B:C579 1826.5.1 Resin, Silicate, an
36、d Silica MaterialsMix a sufficient amount of the components in the proportions and in the mannerspecified by the manufacturer of the materials. Fill the molds one-half full. Remove any entrapped air by using a cutting andstabbing motion with a spatula or rounded-end rod. Fill the remainder of the mo
37、ld, working down into the previously placedportion. Upon completion of the filling operation, the tops of the specimens should extend slightly above the tops of the molds.When the molds have been filled, strike off the excess material, even with the top of the mold. Permit the material to remain int
38、he mold until it has set sufficiently to allow removal without danger of deformation or breakage.6.5.1.1 Silicate MaterialsSome silicates may require covering during the curing period. After removal from the molds,acid-treat the specimens, if required, in accordance with the recommendations given by
39、 the manufacturer. No other treatment shallbe permitted. Record the method of treatment in 9.1.8.6.5.2 Sulfur Materials:6.5.2.1 Sulfur MortarsSlowly melt a minimum of 2 lb (900 g) of the material in a suitable container at a temperature of 265to 290F (130 to 145C) with constant agitation. Stir to li
40、ft and blend the aggregate without beating air into the melt. Place thepiece of plastic sheet containing the 14-in. (6-mm) round hole over the open face of the mold with the hole centered on the face.On top of the piece of plastic sheet and surrounding the hole, place a section of plastic tubing or
41、pipe 1 in. (25 mm) in diameterby 1 in. high. Pour the melted material through the hole into the mold and continue to pour until the section of tubing or pipe iscompletely filled. The excess material contained in the hole in the plastic sheet acts as a reservoir to compensate for shrinkage ofthe mate
42、rial during cooling.6.5.2.2 Allow the specimen to remain in the mold until it has completely solidified. Upon removal, file, grind, or sand thesurface flush, removing the excess material remaining at the pouring gate.6.5.2.3 Sulfur ConcreteHeat and mix a sufficient amount of aggregate components and
43、 sulfur cement in the proportions andin the manner specified by the manufacturer to a temperature of 265 to 290F (130 to 145C). Fill the molds one-half full. Rod25 times using a rounded 58-in. (15-mm) diameter rod. Distribute the strokes uniformly over the cross section of the mold. Repeatwith two a
44、dditional portions allowing the rod to penetrate about 12 in. (12 mm) into the underlying layer. After consolidation, thetops of the specimens should extend slightly above the tops of the molds. Finish the top surface by striking off the excess materialeven with the top of the mold. Permit the mater
45、ial to remain in the mold until it has cooled sufficiently to allow removal withoutdanger of deformation or breakage.6.5.3 Number of Test SpecimensPrepare six test specimens for each material formulation.6.6 Specimen Preparation for Test Method CPrepare specimens in accordance with 6.5 with the foll
46、owing additionalconsiderations:6.6.1 Use of vibrators is generally not required for sulfur concrete but may be required for other materials using Test MethodC. The type and method of vibrating will be as recommended by the manufacturer and shall be specified in the test report.6.6.2 Filling and Capp
47、ing for Cylindrical Resin, Silica, and Silicate SpecimensThe top layer may be filled to slightly belowthe top edge of the mold except for sulfur materials. For sulfur materials, fill slightly above the top edge and strike off flush withthe top edge. The top surface of the specimen shall be finished
48、as much as practicable to a plane perpendicular to the axis of thespecimen. The flatness of the finished specimen shall be within 0.010 in. (0.25 mm). Specimens exceeding this tolerance shall bemachined flat or a capping compound shall be applied if the test load is to be applied to the surface.6.6.
49、2.1 Capping, if used, shall be made as thin as practicable and shall be applied before removal of the polymer concrete fromthe molds.6.6.2.2 If a polymer paste or mortar is used for capping, it is preferable that the polymer used be the same as the one used tomake the specimen. Fillers used may be the fine portion used in the polymer concrete or another mineral powder.6.6.2.3 For capping in the mold, a suitable capping compound may be made from a polymer mortar. The surface of the polymerconcrete shall be wiped off after hardenin
