ASTM_C_1054_-_13.pdf

Designation:C105413Standard Practice forPressing and Drying Refractory Plastic and Ramming MixSpecimens1This standard is issued under the fixed designation C1054;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 This practice covers the pressing and drying of chemi-cally and non-chemically bonded alumin-silicate and highalumina plastic and ramming mix refractory specimens classi-fied in accordance with Classification C673.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.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:2C179 Test Method for Drying and Firing Linear Change ofRefractory Plastic and Ramming Mix SpecimensC181 Test Method for Workability Index of Fireclay andHigh-Alumina Refractory PlasticsC673 Classification of Fireclay and High-Alumina PlasticRefractories and Ramming Mixes3.Significance and Use3.1 This practice is useful for producing uniform specimensof refractory plastics and ramming mixes for use in standardASTM tests.Samples thus formed may be used for refereetesting when setting specifications between producer and user.Establish by mutual agreement and specify in the report theforming parameters such as sample size,workability,andforming pressure when referee testing.3.2 This practice is applicable for preparing test specimensof various sizes.Note that 9 by 412by 212in.(228 by 114 by64-mm)samples,because of their large cross-section,have agreater tendency to form flaws during pressing,handling,anddrying than smaller cross-sectional samples.3.3 The purpose of this practice is to minimize flaws inpressed specimens.It is not intended to duplicate all fieldinstallation conditions.3.4 Variations in workability as determined by Test MethodC181 can significantly affect the number of flaws contained ina specimen.Establish by mutual agreement the workabilitylevel when comparing tests between two laboratories.3.5 This practice is not intended for preparing specimens ofbasic ramming mixes,anhydrous tap-hole mixes,nor resinbonded mixes.4.Apparatus4.1 Power Press,preferably of the hydraulic type,equippedwith suitable molds for forming specimens of the required size(Note 1)and capable of pressing to a minimum of 1500 psi(10.34 MPa)pressure when forming the largest cross-sectionalarea specimen.NOTE1It may be advisable to have the molds slightly oversized sothat,after drying,the specimens will be close to the required size for thespecific test.4.2 Drying Oven,preferably forced-draft rather than naturalconvection,capable of maintaining 230F(110C)with acapacity to hold the specimens.4.3 Balance,sufficient capacity to measure specimens withsensitivity of 0.02 lb(9 g).4.4 Thermometer,with a range of 0 to 180 6 0.1F(18to 80C 6 0.05C).4.5Linear Measuring Device,capable of being read to0.02-in.(0.5-mm).4.6 Mold LubricantEither paraffin or silicone-based oilscan be used as a parting agent for coating mold and diesurfaces.4.7 Two Non-Porous Blocks,approximately12-in.(13-mm)thick.The cross-sectional dimensions of these pieces will vary,depending on the side dimensions of the bar being pressed.1This practice is under the jurisdiction ofASTM Committee C08 on Refractoriesand is the direct responsibility of Subcommittee C08.09 on Monolithics.Current edition approved April 1,2013.Published June 2013.Originallyapproved in 1985.Last previous edition approved in 2008 as C1054 03(2008).DOI:10.1520/C1054-13.2For 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.Sampling5.1 Keep the container or package unopened until testing toensure the sample does not dry out.5.2 The ideal sample test temperature is between 65 and75F(18 and 24C).Measure the temperature by inserting thefull length of the thermometer stem into the material.Note andrecord temperature when the reading is constant.6.Procedure6.1 Workability Index Measurement(Note 2)Determineand report workability of plastics at the time of pressing inaccordance with the procedure described in Test Method C181(Note 3).NOTE2A workability index between 17 and 23 is the optimum rangefor pressing samples with a minimum amount of flaws.If higherworkability material is used in referee tests between t