1、Designation: C287 98 (Reapproved 2012)Standard Specification forChemical-Resistant Sulfur Mortar1This standard is issued under the fixed designation C287; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements for chemical-resistant sulfur mortar, which must be heated and molten to beused, for bondin
3、g chemical-resistant brick or tile. For the use ofthese materials, see Practice C386.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.
4、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 and determine the applica-bility of regulatory limitations prior to use. See Section 7
5、forspecific safety hazard.2. Referenced Documents2.1 ASTM Standards:2C267 Test Methods for Chemical Resistance of Mortars,Grouts, and Monolithic Surfacings and Polymer ConcretesC307 Test Method for Tensile Strength of Chemical-Resistant Mortar, Grouts, and Monolithic SurfacingsC321 Test Method for B
6、ond Strength of Chemical-ResistantMortarsC386 Practice for Use of Chemical-Resistant Sulfur MortarC413 Test Method for Absorption of Chemical-ResistantMortars, Grouts, Monolithic Surfacings, and PolymerConcretesC579 Test Methods for Compressive Strength of Chemical-Resistant Mortars, Grouts, Monolit
7、hic Surfacings, andPolymer ConcretesC580 Test Method for Flexural Strength and Modulus ofElasticity of Chemical-Resistant Mortars, Grouts, Mono-lithic Surfacings, and Polymer ConcretesC904 Terminology Relating to Chemical-Resistant Nonme-tallic Materials3. Terminology3.1 DefinitionsFor definitions o
8、f terms used in thisspecification, see Terminology C904.4. Chemical Composition4.1 The sulfur mortar shall conform to the following re-quirements for chemical composition:Sulfur,% 55to70Inert filler, % 45 to 30Fillers are usually carbon or silica and can affect thechemical resistance of sulfur morta
9、rs.5. Chemical Resistance5.1 A general guide to chemical resistance of sulfur mortarsmay be found in Table 1.5.2 The resistance of sulfur mortar to specific chemicalsshall be determined by Test Method C267.6. Physical Properties6.1 The sulfur mortar shall conform to the following physi-cal requireme
10、nts:Tendency of filler to settle, maximum variation from unity 0.6Tensile strength, min, psi (MPa) 400 (2.8)Compressive strength, min, psi (MPa) 4000 (28)Flexural strength, min, psi (MPa) 1000 (6.9)Strength retained after thermal shock test, min, psi (MPa) 150 (1.0)Bond strength, min, psi (MPa) 150
11、(1.0)Absorption, max, weight % 1.07. Test Methods7.1 Sample the sulfur mortar and determine the propertiesenumerated in this specification in accordance with the follow-ing test methods:7.1.1 Sampling and Preparation of SampleUsing a mini-mum of 5 lb (2.3 kg), melt the sample in less than 1 h. Thenh
12、old at a temperature of 265 to 290F (129 to 143C) for atleast 15 min, while stirring with a laboratory-type mixer. Thismixer shall be of such type and operate at a speed to lift theaggregate, but without beating air into the molten sample. Castall test specimens from this sample.1This specification
13、is under the jurisdiction of ASTM Committee C03 onChemical-Resistant Nonmetallic Materialsand is the direct responsibility of Sub-committee C03.02 on Monolithics, Grouts and Polymer Concretes.Current edition approved Aug. 1, 2012. Published September 2012. Originallyapproved in 1952. Last previous e
14、dition approved in 2008 as C287 98 (2008)1.DOI: 10.1520/C0287-98R12.2For 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 w
15、ebsite.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17.1.2 Storage of Test SpecimensStore all test specimens ata temperature of 73 6 4F (236 2C).7.1.3 Filler Content:7.1.3.1 Determine the filler content of the sulfur mortar byextrac
16、tion with carbon disulfide, (CS2see warning below)using Soxhlet-type equipment. Dry and weigh the filterthimble. Place 10 to 15 g of the sample in the thimble and placethimble in the extraction equipment. Pour 40 to 50 mL ofcarbon disulfide into the flask. Cautiously heat the flask in awater bath ju
17、st enough to slowly reflux the carbon disulfidewhile circulating cold water through the condenser. Continuethe extraction until the carbon disulfide is clear in the siphontube.(WarningCarbon disulfide is highly toxic and highlyflammable with a flash point of -22F (-30C).)7.1.3.2 Remove the filter. D
18、ry carefully, first at a lowtemperature to prevent ignition of the carbon disulfide and thenat 212F (100C), to constant weight. Final weight divided byoriginal weight times 100 equals percent filler content.7.1.4 Tendency of Filler to Settle Fill a 1-in. (25-mm)diameter heat-resistant glass test tub
19、e to a depth of 8 in. (200mm) with molten sulfur mortar and maintain at 285F (141C)for 30 min. Carefully remove test tube from hot environmentand hold under tap water until mortar is completely solidified.Break and remove glass from sulfur specimen. A shrinkagecone will have formed at top of sample
20、on cooling. Cut ormachine off this shrinkage cone portion. Cut remaining mortarspecimen into three sections of approximately equal length.Grind top and bottom thirds separately using a mortar andpestle. Perform extraction test on each sample using procedureoutlined in 7.1.3 and calculate filler cont
21、ent of each. Calculatetendency of filler to settle by dividing filler content of bottomportion by filler content of top portion.7.1.5 Tensile Strength Test Method C307.7.1.6 Compressive StrengthTest Method C579.7.1.7 Flexural StrengthTest Method C580.7.1.8 Thermal Shock TestCast at least five tensil
22、e briquetsas described in Test Method C307 and store them for 48 h atambient temperature. Provide two 5-gal pails, each filledapproximately two-thirds full of water. Maintain the tempera-ture in one pail between 50 and 60F (10 and 15C) as the coldbath, and the other pail between 175 and 185F (80 and
23、 85C)as the hot bath. Place five briquet specimens in a wire cageconstructed so as to hold the briquets spaced at least 1 in. (25.4mm) from each other. Suspend the specimens in the middle ofthe hot bath for 5 min and immediately transfer to the cold bathfor 5 min. After five such cycles, remove the
24、five specimensand determine their tensile strength immediately in accordancewith Test Method C307.7.1.9 Bond Strength Test Method C321.7.1.10 AbsorptionTest Method C413, except that the tem-perature in 6.2 shall be held at 190F (88C) instead of boiling.8. Packaging and Package Marking8.1 The sulfur
25、mortar shall be packaged in suitable contain-ers and marked to denote the type filler. Complete instructionsfor melting and pouring shall be included.8.2 Packages may be marked at the discretion of thesupplier and on his responsibility, indicating that the productsatisfies this specification.9. Keyw
26、ords9.1 brick; chemical resistant; hot melt; sulfur mortar; tilegroutASTM 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 an
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31、.TABLE 1 General Guide to Chemical Resistance of SulfurMortarsNOTE 1This table is intended for use as a general guide to theresistance of sulfur mortars in immersed service at ambient temperature,and may usually be upgraded for spillage only. Specific recommendationsshould be obtained from the manuf
32、acturer of the sulfur mortar.SubstanceChemicalResistanceAAcids, mineralB(nonoxidizing) RAcids, mineral (oxidizing) RCAcids, organic LAlkalies, inorganic NBleaches NWet gases, oxidizing RWet gases, reducing RGases, nonoxidizing and nonreducing RDOrganic solvents LAR = generally recommended.L = limited use.N = not recommended.BSilica filler must be avoided for hydrofluoric acid service.CN for chromic acid, sulfuric acid above 85 % and nitric acid above 40 %.DN for ammonia gas.C287 98 (2012)2
