ASTM_C_166_-_05_2016.pdf

Designation:C16605(Reapproved 2016)Standard Test Method forCovering Capacity and Volume Change Upon Drying ofThermal Insulating Cement1This standard is issued under the fixed designation C166;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.1.Scope1.1 Wet covering capacity and volume change upon dryingare often of major importance in the application of thermalinsulating cement.These properties can be easily determined atthe same time that the determinations of dry covering capacityare made.Therefore,the procedures for determining thesethree properties are covered together in this test method.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:2C163 Practice for Mixing Thermal Insulating CementSamplesC168 Terminology Relating to Thermal Insulation3.Terminology3.1 dry covering capacitythe area covered in“ft2,1 in.inthickness/100 lb of dry cement”(m2,1 cm in thickness/100 kgof dry cement)after the wet cement has been molded and driedto constant weight in accordance with Section 6.3.2 volume change upon dryingthe percentage change involume of the wet molded cement that occurs when the drycement is mixed with the recommended amount of water,molded,and dried to constant weight in accordance withSection 6.3.3 wet covering capacitythe area covered in“ft2,1 in.inthickness/100 lb of dry cement”(m2,1 cm in thickness/100 kgof dry cement)when the cement is mixed with the recom-mended amount of water and molded in accordance withSection 6.3.4 Definitions in Terminology C168 shall be considered asapplying to the terms used in this test method.4.Significance and Use4.1 This test method is used to determine the wet coveringand volume change upon drying of thermal insulating cement.5.Apparatus5.1 MoldA rigid mold having inside dimensions of 1 by 8by 30 in.(25.4 by 203 by 726 mm)with one end and one faceopen,and a piece of wood or other suitable material 1 by 112by 778in.(25.4 by 38.1 by 200 mm)in dimensions for squaringup the end of the test specimen toward the open end of themold.5.2 Wax PaperSheets of wax paper 8 by 30 in.(200 by762 mm)in dimensions.5.3 Engine Oil.5.4 TrowelA 16-in.(about 400-mm)rectangular plaster-ers trowel.5.5 Steel RulesSteel rules 18 and 36 in.(about12and 1 m)in length accurate to within164in.(0.5 mm).5.6 Depth GageA depth gage consisting of a rigid,pointed rod approximately18in.(3 mm)in diameter,fittedwith a flat disk about12in.(13 mm)in diameter which ismoved along the rod either by a sliding action or by means ofthreads.6.Sampling and Mixing6.1 The cement shall be sampled and mixed in accordancewith Practice C163.1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.31 on Chemical andPhysical Properties.Current edition approved Sept.1,2016.Published September 2016.Originallyapproved in 1941.Last previous edition approved in 2010 as C166 05(2010).DOI:10.1520/C0166-05R16.2For 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 7.Procedure7.1 Oil the inside surfaces of the mold well,or line themwith wax paper in order to prevent the cement from sticking tothe sides and to permit convenient removal of the specimen.Then place the mixed cement in the mold.7.2 Trowel the cement in one layer and in two directionslengthwise of the mold without unnecessary compacting,untilthe surface is smooth and flush with the top edges of the mold.Sufficient wet cement shall be used to fill the mold when thepiece of wood or other suitable material is in place in the openend of the mold and in contact with the cement,in order tomake a square end and to prevent movement of the cementafter troweling is completed.7.3 Measure the thickness at nine points on the top surfaceof the sample as indicated in Fig.1.7.4 Make the thickness measurements within an accuracy of62%by means of a depth gage.Carefully push the point rodof the depth gage through the cement until it comes in contactwith the bottom of the mold.Hold the rod constantly in avertical posi