ASTM C1445-2007 Standard Test Method for Measuring Consistency of Castable Refractory Using a Flow Table《用流动稠度试验台测量可浇注耐火材料粘稠度的标准试验方法》.pdf
《ASTM C1445-2007 Standard Test Method for Measuring Consistency of Castable Refractory Using a Flow Table《用流动稠度试验台测量可浇注耐火材料粘稠度的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1445-2007 Standard Test Method for Measuring Consistency of Castable Refractory Using a Flow Table《用流动稠度试验台测量可浇注耐火材料粘稠度的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 1445 07Standard Test Method forMeasuring Consistency of Castable Refractory Using a FlowTable1This standard is issued under the fixed designation C 1445; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the procedure for determiningthe consistency of castable refractory mixes by the flow tablemeth
3、od.1.2 This test method applies to regular weight castablerefractories, insulating castable refractories, and castable re-fractories that require heavy vibration for forming, which aredescribed in Classification C 401. They also apply to suchcastables containing metal fibers.1.3 The values stated in
4、 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.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It
5、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:2C 71 Terminology Relating to RefractoriesC 230/C 230M Specification for FlowTable
6、 for Use inTestsof Hydraulic CementC 401 Classification of Alumina and Alumina-SilicateCastable RefractoriesC 860 Practice for Determining the Consistency of Refrac-tory Castable Using the Ball-In-Hand TestD 346 Practice for Collection and Preparation of CokeSamples for Laboratory Analysis3. Signifi
7、cance and Use3.1 The amount of water used in a castable mix forpreparing test specimens has a significant influence on subse-quent test results. This test method is used primarily todetermine and reproduce the consistency required for theoptimum casting of refractory castables in the preparation oft
8、est specimens and to express that consistency quantitatively.The correct water content is one of the major factors that mustbe controlled to obtain uniform test specimens. Excess watercan reduce strength, increase volume shrinkage, and promotesegregation of the castable ingredients. Insufficient wat
9、er canproduce “honeycombs” (air voids) in the castable because ofpoor consolidation during placement and prevent completehydration of cement.3.2 The flow table (see sketches in Specification C 230/C 230M) has been found to be an excellent tool for measuringthe consistency of a castable and should be
10、 used in cases wherea numerical result is required. Since castables differ somewhatin their “body” or plasticity, it has been found that a goodcasting range, expressed numerically, might vary from castableto castable. While one material may cast well between 40 and60 % flow, another material may nee
11、d to be in the 60 to 80 %flow range to properly flow. Because of this, it has been foundthat no arbitrary optimum range can be stated for all castables.The flow table then becomes a tool for measuring the flow andnot determining it. It can allow the operator to follow themanufacturers recommendation
12、s or to reproduce the consis-tency of a particular castable between laboratories.3.3 Total time of wet mixing must be closely controlled toobtain reproducible results.3.4 This test method is not intended to be used to determinethe proper water content for gunning applications, although itmay provide
13、 information of value for interpretation by a skilledoperator.4. Interferences (Factors Known to Affect Results)4.1 A ruggedness test (Fig. 1) was performed using “C230Calibration Mixture”3. All factors were found not to causestatistically significant effects on measured results. See ASTMResearch Re
14、port No. C08 1016.4.2 Factors which were found to be rugged during the testmethod evaluation were (1) tamper cross section round1This test method is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.09 on Monolith-ics.Current edition app
15、roved March 1, 2007. Published April 2007. Originallyapproved in 1999. Last previous edition approved in 2005 as C 1445 99(2005).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informati
16、on, refer to the standards Document Summary page onthe ASTM website.3Laboratory Flow Table Calibration Mixture available from Cement andConcrete Reference Laboratory; Building Research, 226-Room A365; NationalInstitute of Standards and Technology; Gaithersburg, MD 208989.1Copyright ASTM Internationa
17、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.versus rectangular, (2) tamper surface polyurethane sealedversus unsealed, (3) mold filling procedure, (4) number oftamps 36 versus 44, (5) table drop time 7 s versus 11 s, and(6) operator.5. Apparatus5.1 Balance,
18、 15-lb (6.8-kg) capacity, with sensitivity of0.002 lb (1 g).FIG. 1 Plibrico Ruggedness Test ResultsC14450725.2 Flow Table, Mold, and Calipers, conforming to therequirements of Specification C 230/C 230M.5.3 TamperA nonabsorbing, nonabrasive, non-brittle ma-terial such as a rubber compound having a S
19、hore A durometerhardness of 80 6 10 or hardwood dowel made nonabsorbingby coating with either solvent or water based polyurethane, andthe tamper shall have a cross section of12 by 1 in. (13 by 25mm) or an equivalent circular cross sectional area and aconvenient length of 5 to 6 in. (127 to 152 mm).
20、The tampingface shall be flat and at right angles to the length of the tamper.5.4 Trowel, having a steel blade 4 to 6 in. (100 to 150 mm)in length, with straight edges.5.5 Castable MixerEither a manually or electrically op-erated (see Fig. 2) mechanical mixer4may be used to preparebatches for the co
21、nsistency determination. Size the mixingbowl to contain 50 to 70 % volume loading with the dry batch.NOTE 1Castable-water requirement variation becomes more signifi-cant as dry volume loadings drop below 50 % of the capacity of the mixerbowl because the water required to wet the bowl surfaces change
22、s morerapidly with decreasing volume loadings.5.6 Thermometer, dial or digital-type, metal, with a rangefrom 0 to 180F (18 to 80C).5.7 Vibrating TableAn electric vibrating table with3600 Hz and at least a 1-ft2surface.5.8 Sample Splitter, designed to reduce the castable to thedesired weight and ensu
23、re that the grain size distribution isrepresentative of the original batch.NOTE 2A Jones or riffle-type sample splitter is satisfactory, providedthe openings are large enough to accommodate the largest aggregateparticle. If a sample splitter is not available, hand reduction by thecone-and-quarter me
24、thod may be used. Follow the applicable portions ofthis test method as described in Practice D 346.6. Sampling6.1 At the time of use, the dry castable mix should bebetween 68 and 72F (20 and 22C). The temperature ismeasured by inserting the full length of the dial-thermometerstem into the material u
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