C 287 – 98 R03_QZI4NW__

Designation C 287 98 Reapproved 2003 Standard Specification for Chemical-Resistant Sulfur Mortar 1 This standard is issued under the fixed designation C 287; the number immediately following the designation indicates the year of original adoption or, in the case of revision, 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. 1. Scope 1.1 This specification covers the requirements for chemical- resistant sulfur mortar, which must be heated and molten to be used, for bonding chemical-resistant brick or tile. For the use of these materials, see Practice C 386. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for ination only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility 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 for specific safety hazard. 2. Referenced Documents 2.1 ASTM Standards 2 C 267 Test for Chemical Resistance of Mortars, Grouts, and Monolithic Surfacings and Polymer Concretes C 307 Test for Tensile Strength of Chemical- Resistant Mortars, Grouts, and Monolithic Surfacings C 321 Test for Bond Strength of Chemical- Resistant Mortars C 386 Practice for Use of Chemical-Resistant Sulfur Mortar C 413 Test for Absorption of Chemical-Resistant Mortars, Grouts, and Monolithic Surfacings and Polymer Concretes C 579 Test for Compressive Strength of Chemical- Resistant Mortars, Grouts, Monolithic Surfacings and Polymer Concretes C 580 Test for Flexural Strength and Modulus of Elasticity of Chemical-Resistant Mortars, Grouts, and Monolithic Surfacings and Polymer Concretes C 904 Terminology Relating to Chemical-Resistant Non- metallic Materials 3. Terminology 3.1 DefinitionsFor definitions of terms used in this speci- fication, see Terminology C 904. 4. Chemical Composition 4.1 The sulfur mortar shall con to the following re- quirements for chemical composition Sulfur, 55 to 70 Inert filler, 45 to 30 Fillers are usually carbon or silica and can affect the chemical resistance of sulfur mortars. 5. Chemical Resistance 5.1 A general guide to chemical resistance of sulfur mortars may be found in Table 1. 5.2 The resistance of sulfur mortar to specific chemicals shall be determined by Test C 267. 6. Physical Properties 6.1 The sulfur mortar shall con to the following physi- cal requirements Tendency of filler to settle, maximum variation from unity 0.6 Tensile 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 1.0 Absorption, max, weight 1.0 7. Test s 7.1 Sample the sulfur mortar and determine the properties enumerated in this specification in accordance with the follow- ing test s 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. Then hold at a temperature of 265 to 290F 129 to 143C for at least 15 min, while stirring with a laboratory-type mixer. This mixer shall be of such type and operate at a speed to lift the aggregate, but without beating air into the molten sample. Cast all test specimens from this sample. 7.1.2 Storage of Test SpecimensStore all test specimens at a temperature of 73 6 4F 236 2C. 7.1.3 Filler Content 1 This specification is under the jurisdiction of ASTM Committee C03 on Chemical-Resistant Nonmetallic Materials and is the direct responsibility of Subcommittee C03.02 on Mortar and Monolithics. Current edition approved Oct. 1, 2003. Published October 2003. Originally approved in 1952. Last previous edition approved in 1998 as C 287 98. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standards volume ination, refer to the standards Document Summary page on the ASTM website. 1 Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. 7.1.3.1 Determine the filler content of the sulfur mortar by extraction with carbon disulfide, CS 2 see Note 1 using Soxhlet-type equipment. Dry and weigh the filter thimble. Place 10 to 15 g of the sample in the thimble and place thimble in the extraction equipment. Pour 40 to 50 mL of carbon disulfide into the flask. Cautiously heat the flask in a water bath just enough to slowly reflux the carbon disulfide while circu- lating cold water through the condenser. Continue the extrac- tion until the carbon disulfide is clear in the siphon tube. NOTE 1Caution Carbon disulfide is highly toxic and highly flam- mable with a flash point of -22F -30C. 7.1.3.2 Remove the filter. Dry carefully, first at a low temperature to prevent ignition of the carbon disulfide and then at 212F 100C, to constant weight. Final weight divided by original weight times 100 equals percent filler content. 7.1.4 Tendency of Filler to SettleFill a 1-in. 25-mm diameter heat-resistant glass test tube to a depth of 8 in. 200 mm with molten sulfur mortar and maintain at 285F 141C for 30 min. Carefully remove test tube from hot environment and hold under tap water until mortar is completely solidified. Break and remove glass from sulfur specimen. A shrinkage cone will have ed at top of sample on cooling. Cut or machine off this shrinkage cone portion. Cut remaining mortar specimen into three sections of approximately equal length. Grind top and bottom thirds separately using a mortar and pestle. Per extraction test on each sample using procedure outlined in 7.1.3 and calculate filler content of each. Calculate tendency of filler to settle by dividing filler content of bottom portion by filler content of top portion. 7.1.5 Tensile StrengthTest C 307. 7.1.6 Compressive StrengthTest C 579. 7.1.7 Flexural StrengthTest C 580. 7.1.8 Thermal Shock TestCast at least five tensile briquets as described in Test C 307 and store them for 48 h at ambient temperature. Provide two 5-gal pails, each filled approximately two-thirds full of water. Maintain the tempera- ture in one pail between 50 and 60F 10 and 15C as the cold bath, and the other pail between 175 and 185F 80 and 85C as the hot bath. Place five briquet specimens in a wire cage constructed so as to hold the briquets spaced at least 1 in. 25.4 mm from each other. Suspend the specimens in the middle of the hot bath for 5 min and immediately transfer to the cold bath for 5 min. After five such cycles, remove the five specimens and determine their tensile strength immediately in accordance with Test C 307. 7.1.9 Bond StrengthTest C 321. 7.1.10 AbsorptionTest C 413, except that the temperature in 6.2 shall be held at 190F 88C instead of boiling. 8. Packaging and Package Marking 8.1 The sulfur mortar shall be packaged in suitable contain- ers and marked to denote the type filler. Complete instructions for melting and pouring shall be included. 8.2 Packages may be marked at the discretion of the supplier and on his responsibility, indicating that the product satisfies this specification. 9. Keywords 9.1 brick; chemical resistant; hot melt; sulfur mortar; tile grout ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 phone, 610-832-9555 fax, or serviceastm.org e-mail; or through the ASTM website www.astm.org. TABLE 1 General Guide to Chemical Resistance of Sulfur Mortars NOTEThis table is intended for use as a general guide to the resistance of sulfur mortars in immersed service at ambient temperature, and may usually be upgraded for spillage only. Specific recommendations should be obtained from the manufacturer of the sulfur mortar. Substance Chemical Resistance A Acids, mineral B nonoxidizing R Acids, mineral oxidizing R C Acids, organic L Alkalies, inorganic N Bleaches N Wet gases, oxidizing R Wet gases, reducing R Gases, nonoxidizing and nonreducing R D Organic solvents L A R generally recommended. L limited use. N not recommended. B Silica filler must be avoided for hydrofluoric acid service. C N for chromic acid, sulfuric acid above 85 and nitric acid above 40 . D N for ammonia gas. C 287 98 2003 2