DLA A-A-59303 A-2010 TALC TECHNICAL.pdf
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1、 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: STDZNMGTdla.mil or Defense Supply Center Richmond (DSCR), ATTN: DSCR-VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616. Since contact information
2、can change, you may want to verify the currency of this address information using the ASSIST database at https:/assist.daps.dla.mil. AMSC N/A FSC 6810 METRIC A-A-59303A SUPERSEDING 7 JUNE 2010 A-A-59303 16 October 1998 COMMERCIAL ITEM DESCRIPTION TALC, TECHNICAL The General Services Administration h
3、as authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This commercial item description (CID) covers three types of modified commercial grade talc. Types T1 and T3 are intended for use as stimulants for riot control agents CA (orthochlorobenzylidene malononitri
4、le), CS1 and CS2. Type T1 is also intended for use in dusting and lubrication. Type T4, used for repairing and retreading pneumatic tires on ground vehicles, is equivalent to A-A-52518 Type IV Class B. 2. CLASSIFICATION. The talc shall be of the following types as specified (see 7.3) Type T1 - 35/65
5、 silicon dioxide Type T3 - 55/65 silicon dioxide Type T4 - 53 micrometer (m) 3. SALIENT CHARACTERISTICS 3.1 Chemical and physical characteristics. Talc shall conform to the chemical and physical characteristics of Table I when tested as specified herein. Provided by IHSNot for ResaleNo reproduction
6、or networking permitted without license from IHS-,-,-A-A-59303A 2 TABLE I. Chemical and physical characteristics. Characteristics Type T1 Type T3 Type T4 Test paragraph Min. Max. Min. Max. Max. Silicon dioxide, percent by weight 35 65 55 65 - 3.2 Calcium oxide, percent by weight - - - 0.30 - 3.2 Mag
7、nesium oxide, percent by weight 20 40 25 35 - 3.2 Loss on ignition, percent by weight - - - 8 - ASTM D1208 Loss on Ignition and Ash Asbestos and other fibers - None detected - None detected None detected 3.3 Percent by weight retained on a sieve - 5 - - 10 3.4 Average particle size, micrometers - -
8、- 3.5 - 3.5 Apparent density, grams per cubic centimeter - - - 0.25 - ASTM D1895 Method A Abbreviations: Min. = minimum; Max. = maximum; ASTM American Society for Testing and Materials 3.2 Oxide tests x-ray fluorescence (XRF) spectrometer method. 3.2.1 Instrument calibration. Certified magnesium oxi
9、de reference materials, plus other certified reference materials, shall be used in instrument calibration. The method by which the reference materials are prepared for instrument calibration must be identical to that for all samples. 3.2.2 X-ray emission spectrometric analysis. The x-ray emission sp
10、ectrometric analysis of magnesium oxide shall be performed by the same conditions and parameters established at the time of instrument calibration 3.2.3 Ignition. Samples shall be ignited to the oxide basis. Samples are then fused with lithium tetraborate, cast to form a fused glass disk, tempered a
11、nd readied for x-ray analysis. 3.2.4 Magnesium oxide content. Determine magnesium oxide content of each sample. The spectrometer shall produce a report that shows the silicon dioxide, calcium oxide, and magnesium oxide content. Provided by IHSNot for ResaleNo reproduction or networking permitted wit
12、hout license from IHS-,-,-A-A-59303A 3 3.2.5 Oxide tests alternate method. Determine the silicon dioxide, calcium oxide, and magnesium oxide content weight of the sample in accordance with ASTM D717, Analysis of Magnesium Silicate Pigment. 3.3 Asbestos and other fibers. Talc, technical, shall be fib
13、er free. For purposes of this test, a fiber is a particle that has a length greater than 5 micrometers and an aspect ratio (length to width ratio) of 3 or more to 1. Determine the presence of fibers in accordance with Environmental Protection Agency test method EPA/600/R-93/116, Method for the Deter
14、mination of Asbestos in Bulk Building Materials. 3.4 Percent retained on sieve. 3.4.1 Percent retained on sieve, Type T1. Determine the percent by weight of specimen retained on a No. 400 (38 m) sieve in accordance with ASTM D185, Standard Test Method for Coarse Particles in Pigments. 3.4.2 Percent
15、retained on sieve, Type T4. Determine the percent by weight of specimen retained on a No. 270 (53m) sieve in accordance with ASTM D185, Standard Test Method for Coarse Particles in Pigments. 3.5 Average particle size. Determine the average particle size of the specimen by a particle size analyzer us
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