1、Designation: C897 15Standard Specification forAggregate for Job-Mixed Portland Cement-Based Plasters1This standard is issued under the fixed designation C897; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers natural or manufactured aggre-gate for use in job-mixed base and finish-coat full thicknessportland cem
3、ent-based plasters.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 The text of this specification references notes andfootnotes t
4、hat 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 SystemsC40 Test Method for Or
5、ganic Impurities in Fine Aggregatesfor ConcreteC87 Test Method for Effect of Organic Impurities in FineAggregate on Strength of MortarC88 Test Method for Soundness of Aggregates by Use ofSodium Sulfate or Magnesium SulfateC117 Test Method for Materials Finer than 75-m (No. 200)Sieve in Mineral Aggre
6、gates by WashingC123 Test Method for Lightweight Particles in AggregateC125 Terminology Relating to Concrete and Concrete Ag-gregatesC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC142 Test Method for Clay Lumps and Friable Particles inAggregatesD75 Practice for Sampling Aggregates3
7、. Terminology3.1 DefinitionsDefinitions used in this standard shall be inaccordance with Terminologies C11 and C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 aggregate, na granular material such as natural ormanufactured sand used with a cementing medium to formplaster (stucco).3.2.2
8、manufactured sand, nthe fine material resultingfrom the crushing and classification by screening, or otherwise,of rock, gravel, or blast furnace slag.3.2.3 natural sand, nthe fine granular material resultingfrom the natural disintegration of rock.4. Composition4.1 Deleterious SubstancesThe amount of
9、 deleterioussubstances in aggregates, each determined on independentsamples complying with the grading requirements of Section 6,shall not be more than the following:ItemMaximumPermissibleWeight, %Friable particles 1.0Light weight particles, floating on liquid having aspecific gravity of 2.00.54.2 O
10、rganic Impurities:4.2.1 The aggregate shall be free of injurious amounts oforganic impurities. Except as herein provided, aggregatessubjected to the test for Organic Impurities, Test Method C40,and producing a color darker than the standard shall berejected.4.2.2 Aggregate failing the test for organ
11、ic impurities maybe used provided that, when tested for the effect of organicimpurities on strength in accordance with Test Method C87, therelative strength at seven days is not less than 95 %.5. Physical Properties5.1 Soundness (see 7.1.7):5.1.1 Except as herein provided, aggregate subjected to fiv
12、ecycles of the soundness test shall show a loss, when weighed inaccordance with the grading of a sampling complying with thelimitations set forth in Section 6, not greater than 20 % whensodium sulfate is used, or 15 % when magnesium sulfate isused.1This specification is under the jurisdiction of AST
13、M Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved June 1, 2015. Published June 2015. Originallyapproved in 1978. Last previous edit
14、ion approved in 2014 as C897 05 (2014).DOI: 10.1520/C0897-15.2For 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.
15、*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.2 Aggregates failing to meet the requirements of 5.1.1shall be accepted, provided there is evidence that plasters ofc
16、omparable properties made from similar aggregates from thesame source has been exposed to weathering, similar to that tobe encountered, for a period of more than five years withoutappreciable disintegration.6. Dimensions, Mass, and Permissible Variations6.1 Aggregate for Base CoatAggregate for use i
17、n basecoat portland cement-based plasters shall be graded as follows:U.S. Standard Sieve Percent Retained (by Weight)Natural Sand Manufactured Sandmax min max minNo. 4 (4.75 mm) 0 0 0 0No. 8 (2.36 mm) 10 0 10 0No. 16 (1.18 mm) 40 10 40 10No. 30 (600 m) 65 30 65 30No. 50 (300 m) 90 70 80 60No. 100 (1
18、50 m) 100 95 90 75No. 200 (75 m) 100 97 100 906.1.1 Not more than 50 % shall be retained between any twoconsecutive sieves shown in the above table, nor more than25 % between No. 50 (300 m) and No. 100 (150 m) sieves.The amount of material finer than a No. 200 (75 m) sieve shallnot exceed 3 %.6.1.2
19、The fineness modulus shall fall between 2.05 and 3.05.If the fineness modulus varies by more than 0.25 from thevalue assumed in selecting proportions for the plaster, theaggregate shall be rejected unless adjustments are made inproportions to compensate for change in grading.NOTE 1The gradation of a
20、ggregate used in portland cement-basedplaster affects the workability, shrinkage characteristic porosity, anddurability of the plaster.6.1.3 Aggregate failing to meet only the gradation limits ofthis specification shall be permitted to be used, provided thesupplier furnishes satisfactory documentati
21、on to the specifierthat the plaster made with the aggregate has an acceptabledemonstrated performance record.6.2 Aggregate for Finish Coat PlasterAggregate for finishcoat plaster shall all pass the No. 8 (2.36 mm) sieve and meetthe remaining gradation requirements of 6.1, except wherespecial texture
22、 finishes require gradation of aggregate outsideof these limits.6.2.1 When special texture finishes require gradation of theaggregate outside of the limits of 6.1, sample panels shall berequired and evaluated in accordance with criteria defined inthe purchase agreement.NOTE 2Special texture finishes
23、 may require modification of theplaster formulation and application to compensate for the effect ofaggregate gradation.7. Sampling and Testing7.1 The aggregate shall be sampled and tested as specifiedin the following methods, except as otherwise specified in thisspecification:7.1.1 Sampling, Practic
24、e D75.7.1.2 Fineness Modulus, Terminology C125, is obtained byadding the total percentages shown by the sieve analysis to beretained on each of the sieves in 6.1, except the No. 200(75 m) sieve, and dividing the sum by 100.7.1.3 Materials Finer than No. 200 (75 m) Sieve, TestMethod C117 by washing.7
25、.1.4 Friable Particles, Test Method C142.7.1.5 Light Constituents, Test Method C123.7.1.6 Organic Impurities, Test Method C40.7.1.7 Soundness, Test Method C88.7.1.8 Sieve Analysis, Test Method C136.8. Inspection8.1 Inspection of the material shall be agreed upon betweenthe purchaser and supplier as
26、part of the purchase contract.9. Rejection and Rehearing9.1 Any rejection shall be based upon the specific cause offailure to conform to the requirements of this specification, andshall be reported to the seller within ten working days from thereceipt of the shipment by the purchaser.9.2 Claims for
27、rehearing shall be valid only if made within20 working days from receipt of notice of specific cause forrejection.10. Certification10.1 When specified in the purchase order a producers orsuppliers certification shall be furnished to the purchaser thatthe material was prepared or manufactured in acco
28、rdance withthis specification and has been found to meet the specifiedrequirements.11. Packaging and Package Marking11.1 Where packaged, the materials shall be packaged insubstantial commercial containers of the type, size, and kindcommonly used for the purpose, so constructed as to preservethe cont
29、ents in good condition, and to ensure acceptance andsafe delivery by common or other carriers, at the lowest rate, tothe point of delivery.11.2 The containers shall be so made that the contents canbe partially removed without destroying the containers abilityto serve as a receptacle for the remainde
30、r of the contents.11.3 The containers shall be labeled to show the content,weight, and the name of the manufacturer or supplier.11.4 Where delivered in bulk quantities, the bill of ladingshall show the quantity by weight, or cubic yards, and the nameof the manufacturer or supplier.11.5 Each package
31、or container shall be marked with thename of manufacturer, description of contents, and amount.12. Keywords12.1 aggregate; fine aggregate; gradation; natural and manu-factured sand; particle shape and size; plaster stucco; sound-nessC897 152SUMMARY OF CHANGESCommittee C11 has identified the location
32、 of selected changes to this standard since the last issue(C897 05 (2014) that may impact the use of this standard. (Approved June 1, 2015.)(1) Revised subsection 1.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin th
33、is standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must b
34、e reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theres
35、ponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, W
36、est Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 153
