ASTM_C_531_-_00_2012.pdf

Designation:C53100(Reapproved 2012)Standard Test Method forLinear Shrinkage and Coefficient of Thermal Expansion ofChemical-Resistant Mortars,Grouts,Monolithic Surfacings,and Polymer Concretes1This standard is issued under the fixed designation C531;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 Department of Defense.1.Scope1.1 This test method covers the measurement of the linearshrinkage during setting and curing and the coefficient ofthermal expansion of chemical-resistant mortars,grouts,mono-lithic surfacings,and polymer concretes.1.2 A bar of square cross-section is cast to a prescribedlength in a mold that holds measuring studs that are captured inthe ends of the finished casting.1.2.1 The change in length after curing is measured andused to calculate shrinkage.NOTE1Shrinkage determinations should not be made on sulfurmortars,since this test method cannot truly reflect the overall linearshrinkage of a sulfur mortar.1.2.2 The change in length at a specific elevated temperatureis measured and used to calculate the coefficient of thermalexpansion.1.3 This test method is limited to materials with aggregatesize of 0.25 in.(6 mm)or less.1.4 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.1.5 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:2C287 Specification for Chemical-Resistant Sulfur MortarC490 Practice for Use ofApparatus for the Determination ofLength Change of Hardened Cement Paste,Mortar,andConcreteC904 Terminology Relating to Chemical-Resistant Nonme-tallic Materials3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,see Terminology C904.4.Significance and Use4.1 This test method offers a means of comparing therelative linear shrinkage and coefficient of thermal expansion.4.1.1 The material to be tested is placed in the mold in afluid or plastic state.As the material makes a transition to asolid state,it adheres to and captures the end studs.4.1.2 The linear shrinkage measured is the change in lengththat occurs after the material is rigid enough and strong enoughto move the studs.4.2 This test method can be used for research purposes toprovide information on linear changes taking place in the testmaterials.Other dimensional changes may occur that do notmanifest themselves as changes in length.5.Apparatus5.1 Weighing Equipment,shall be capable of weighingmaterials or specimens to 60.3%accuracy.1This 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.Originallyapproved in 1963.Last previous edition approved in 2005 as C531 00(2005).DOI:10.1520/C0531-00R12.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 Equipment for Mixing,consisting of a container ofsuitable size preferably made of corrosion-resistant metal,or aporcelain pan,and a sturdy spatula or trowel.5.3 Specimen Mold,(see Practice C490)permitting themolding of bars with a metal stud embedded in each end.Thebars shall be 1 in.(25 mm)square by 10 in.(250 mm)betweenstuds when molded.A standard 10-in.(250-mm)metal barshall be provided;this is used to space the studs.5.4 StudsNickel alloy studs,which have linear coefficientof thermal expansion of 7.2 106per F(4 106per C),knurled on one end and threaded on the other(for securing inend blocks),approximately 0.8 in.(20 mm)long.Remove anymachining burrs from the flat end of the stud.5.5 ComparatorA direct-reading dial or digital microm-eter to permit readings to 0.0001 in.(0.0025 mm).5.6 Micrometers,one having a range suitable for measuringthe studs(0.8 in.),and one having a range suitable formeasuring the standard 10-in.(254-mm)bar,both readable to0.0001 in.(0.0025 mm).5.7 Constant-Temperature OvenAn oven capable of at-taining temperatures to 210F(99C)is required.The ovenshould be capable of maintaining a set temperature constant to63F(61.5C).6.Tes