ASTM_C_307_-_03_2012.pdf

Designation:C30703(Reapproved 2012)Standard Test Method forTensile Strength of Chemical-Resistant Mortar,Grouts,andMonolithic Surfacings1This standard is issued under the fixed designation C307;the number immediately following the designation indicates the year 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.Department of Defense.1.Scope1.1 This test method covers the determination of tensilestrength of cured chemical-resistant materials in the form ofmolded briquets.These materials include mortars,brick andtile grouts,machinery grouts,and monolithic surfacings.Thesematerials shall be based on resin,silicate,silica,or sulfurbinders.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 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.2.Referenced Documents2.1 ASTM Standards:2C904 Terminology Relating to Chemical-Resistant Nonme-tallic MaterialsE4 Practices for Force Verification of Testing Machines3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,seeTerminology C904.4.Significance and Use4.1 It is recognized that chemical-resistant mortars,grouts,and monolithic surfacings are not usually under tension whenin service;however,such data are useful for purposes ofdetermining the rate of cure and other properties.4.2 This test method is not recommended for mortars,grouts,and monolithic surfacings containing aggregate greaterthan14in.5.Apparatus5.1 Weighing Equipment,shall be capable of weighingmaterials or specimens to 60.3%accuracy.5.2 Specimen MoldsThe molds for making briquet testspecimens shall be sufficiently rigid to prevent deformationduring molding and shall be made of corrosion-resistantmaterial.Gang molds,when used,shall be of the type shown inFig.1.The dimensions of the briquet molds shall be the widthof the mold,between inside faces,at waist line of briquet,1 in.The width and the depth of the briquet mold at the waist lineshall be 1 in.6 0.02in.(25mm 6 0.5mm).The molds shallconform to the dimensional requirements shown in Fig.2.5.3 Equipment for Mixing Materials,shall consist of acontainer of suitable size,preferably corrosion resistant,and astrong,sturdy spatula,trowel,or mechanical mixer.5.4 The following additional equipment is required forsulfur mortars.5.4.1 Melting Chamber,of sufficient volume and heat ca-pacity to melt the mortar sample and maintain the temperatureof the melt between 260 and 290F(127 and 143C).35.4.2 Laboratory Mixer,of such a type and speed to becapable of lifting the aggregate without beating air into themelt.5.4.3 Ladle,of sufficient capacity to completely pour onebriquet.5.5 Testing Machine,the testing machine shall be of anytype sufficient to provide the required load and the rate of1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved Aug.1,2012.Published September 2012.Originallypublished in 1953.Last previous edition approved in 2008 as C307 03(2008).DOI:10.1520/C0307-03R12.2For 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 website.3The sole source of supply of the Forney capping compound melting chamber,Model LA-0130,known to the committee at this time is Forney Industries,Inc.,1565 Broadway Ave.,Hermitage,PA 16148.If you are aware of alternativesuppliers,please provide this information to ASTM Headquarters.Your commentswill receive careful consideration at a meeting of the responsible technicalcommittee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 crosshead movement prescribed.It shall have been verified tohave an accuracy of 1.0%or better within 12 months of thetime of use in accordance with Practices E4.5.6 Tension Clips,for holding the tension test specimens,shall be in accordance with Fig.3.6.Test Specimens6.1 All specimens for a single determination shall be madefrom a single mix containing sufficient amounts of the com-ponents in the proportions and in the manner specified by themanufacturer of the materials.If the proportions so specifiedare by volume,the constituents sh