1、Designation:C3501(Reapproved 2014)Standard Specification forInorganic Aggregates for Use in Gypsum Plaster1This standard is issued under the fixed designation C35;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revis
2、ion.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers perlite,vermiculite,natu
3、raland manufactured sand for use as gypsum plaster aggregates.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 n
4、ot 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.1.4 The text of this specification referen
5、ces notes andfootnotes that provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the specification.2.Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC2
6、9/C29M Test Method for Bulk Density(“Unit Weight”)and Voids in AggregateC40 Test Method for Organic Impurities in Fine Aggregatesfor ConcreteC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC471M Test Methods for ChemicalAnalysis of Gypsum andGypsum Products(Metric)D75 Practice for Sa
7、mpling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions shall be in accordance with TerminologyC11.3.2 Definitions of Terms Specific to This Standard:3.2.1 manufactured sand,nthe fine material resultingfrom the crushing and classification by scre
8、ening,or otherwise,of rock,gravel,or blast furnace slag.3.2.2 natural sand,nthe fine granular material resultingfrom the natural disintegration of rock or from the crushing offriable sandstone.3.2.3 perlite aggregate,na siliceous volcanic glass ex-panded by heat.3.2.4 vermiculite aggregate,na micace
9、ous mineral ex-panded by heat.4.Chemical Composition4.1 Water-soluble impurities in sand shall not exceed 0.15weight%and sodium ion content shall not exceed 0.02 weight%when tested in accordance with Section 7.4.2 Sand shall develop a color no darker than the standard,when subjected to the colorimet
10、ric test for organic impurities inaccordance with Test Method C40,unless it is established byadequate tests that the impurities causing the color are notharmful in plaster.5.Mechanical Requirements5.1 GradingShall be as follows when tested in accordancewith Section 7:5.1.1 Perlite and vermiculite sh
11、all be graded within thelimits specified in Table 1.5.1.2 Natural and Manufactured SandShall be gradedwith not more than 50%retained between any two consecutivesieves shown in Table 1,nor more than 25%between theNo.50(300 m)and No.100(150 m)sieves.5.2 Density:5.2.1 Perlite shall have a density of no
12、t less than 6 nor morethan 12 lb/ft3(96 to 192 kg/m3)when tested in accordance withTest Method C29/C29M using the shoveling procedure.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommitte
13、e C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved Sept.1,2014.Published October 2014.Originallyapproved in 1921.Last previous edition approved in 2009 as C35 01(2009).DOI:10.1520/C0035-01R14.2For referenced ASTM standards,visit the ASTM website,
14、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 5.2.2 Verm
15、iculite shall have a density of not less than 6 normore than 10 lb/ft3(96 to 160 kg/m3)when tested in accor-dance with Test Method C29/C29M using the shovelingprocedure.6.Sampling6.1 ApparatusSuitable thief tube.6.2 Bulk AggregateObtain specimens of sand in accor-dance with Practice D75.6.3 Bagged A
16、ggregateObtain from 1 bag randomly se-lected from each 100 bags but not less than 6 bags from theshipment.For smaller shipments,not less than 6%of thenumber of bags shall constitute the sample.6.3.1 Secure specimens by inserting a suitable thief tube thefull distance between diagonally opposite corners of the bagwith the bag lying in a horizontal position.Combine theportions to produce a composite specimen having a volume notless than 1 ft3(0.028 m3).Prepare and test not less than 1composite spe
