1、Designation:C28798(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 number
2、 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 bonding chemical-re
3、sistant 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.1.3 This standar
4、d 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 forspecific safety h
5、azard.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 Bond Strength of Chemical
6、-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,Monolithic Surfacings,andPolymer Con
7、cretesC580 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 of terms used in thisspecification,
8、see Terminology C904.4.Chemical Composition4.1 The sulfur mortar shall conform to the following re-quirements for chemical composition:Sulfur,%55 to 70Inert filler,%45 to 30Fillers are usually carbon or silica and can affect thechemical resistance of sulfur mortars.5.Chemical Resistance5.1 A general
9、 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 requirements:Tendency of filler to settle,maximu
10、m variation from unity0.6Tensile 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(1.0)Absorption,max,weight%1.07.Test Methods7.1 Sample the sulfur
11、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.Thenhold at a temperature of 265 to 290F(129 to 143C)for atleast 15 min,while s
12、tirring 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 is under the jurisdiction of ASTM Committee C03 onChemical-Resistant Nonmetallic
13、 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 edition approved in 2008 as C287 98(2008)1.DOI:10.1520/C0287-98R12.2For referenced ASTM
14、 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19
15、428-2959.United States1 7.1.2 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 byextraction with carbon disulfide,(CS2see warning below)using Soxhlet-type equipment.Dry and weigh the fi
16、lterthimble.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 just 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.Dry care
