1、Designation: C 1328 05Standard Specification forPlastic (Stucco) Cement1This standard is issued under the fixed designation C 1328; 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
2、indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers two types of plastic cement foruse in portland cement-based plasters for exterior (stucco) andinterior application.1.2 The values
3、stated in SI units are to be regarded as thestandard. Values in SI units shall be obtained by measurementin SI units or by appropriate conversion, using the Rules forConversion and Rounding given in IEEE/ASTM SI 10, ofmeasurements made in other units.1.3 The text of this standard refers to notes and
4、 footnotesthat provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.4 The following safety hazards caveat pertains only toSections 14 and 15. This standard does not purport to addressall of the safety
5、concerns, if any, associated with its use. It isthe responsibility of the user of this standard to establishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.(WarningFresh hydraulic cementitious mixtures are causticand may cause chemical bu
6、rns to skin and tissue uponprolonged exposure.)22. Referenced Documents2.1 ASTM Standards:3C 109/C 109M Test Method for Compressive Strength ofHydraulic Cement Mortars (Using 2-in. or 50-mm CubeSpecimens)C 151 Test Method for Autoclave Expansion of HydraulicCementC 183 Practice for Sampling and the
7、Amount of Testing ofHydraulic CementC 185 Test Method for Air Content of Hydraulic CementMortarC 187 Test Method for Normal Consistency of HydraulicCementC 188 Test Method for Density of Hydraulic CementC 219 Terminology Relating to Hydraulic CementC 266 Test Method for Time of Setting of Hydraulic-
8、Cement Paste by Gillmore NeedlesC 305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC 430 Test Method for Fineness of Hydraulic Cement bythe 45-m (No. 325) SieveC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used
9、in theTesting of Hydraulic Cements and ConcretesC 778 Specification for Standard SandC 926 Specification for Application of Portland Cement-Based PlasterC 1506 Test Method for Water Retention of HydraulicCement-Based Mortars and PlastersIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of
10、Units (SI) (the Modernized Metric System)3. Terminology3.1 DefinitionsTerms used in this specification are definedin Terminology C 219 and Specification C 926.3.2 Definition of Term Specific to This Standard:3.2.1 plastic cementa hydraulic cement, primarily used inportland cement-based plastering co
11、nstruction, consisting of amixture of portland or blended hydraulic cement and plasticiz-ing materials (such as limestone or hydrated or hydraulic lime),together with other materials introduced to enhance one ormore properties such as setting time, workability, water reten-tion, and durability.3.2.1
12、.1 DiscussionThe term “plastic” does not refer to theinclusion of one or more organic components in the cement.The cement is predominantly inorganic in chemical composi-tion. The term “plastic” refers to the ability of the cement toimpart to the plaster a high degree of workability, and for the1This
13、 specification is under the jurisdiction of ASTM Committee C01 onCement and is the direct responsibility of Subcommittee C01.11 on MasonryCement.Current edition approved September 15, 2005. Published October 2005. Origi-nally approved in 1996. Last previous edition approved in 2003 as C 1328 03a.2An
14、nual Book of ASTM Standards, Vol 04.01. See the section on SafetyPrecautions in the Manual of Cement Testing.3For 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 sta
15、ndards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.plaster to remain workable or plastic for a period of time sothat, after initial application and floating on the wall, it can bereworked
16、to obtain both densification and desired texture.4. Physical Properties4.1 Plastic cement shall conform to the applicable require-ments prescribed in Table 1.5. Sampling5.1 At the option of the purchaser, the cement shall besampled and tested to verify compliance with this specification,sampling and
17、 testing shall be performed in accordance withPractice C 183.5.2 Practice C 183 is not designed for manufacturing qualitycontrol and is not required for manufacturers certification.6. Temperature and Humidity6.1 The temperature and relative humidity of the air in thevicinity of the mixing slab and d
18、ry materials, molds, baseplates, and mixing bowl shall conform to the requirements ofTest Method C 109/C 109M.6.2 The moist cabinet or moist room shall conform to therequirements of Specification C511.7. Fineness7.1 Determine the residue on the 45-m (No. 325) sieve inaccordance with Test Method C 43
19、0.8. Normal Consistency8.1 Determine normal consistency by the Vicat apparatus inaccordance with Test Method C 187.9. Autoclave Expansion9.1 Determine the autoclave expansion in accordance withTest Method C 151. After molding, store the bars in the moistcabinet or room for 48 h 6 30 min before remov
20、al from themolds for measurement and testing in the autoclave. Calculatethe difference in length of the test specimen before and afterautoclaving to the nearest 0.01 % of the effective gage length,and report as the autoclave expansion of the plastic cement.10. Time of Setting10.1 Determine the time
21、of setting by the Gillmore needlemethod in accordance with Test Method C 266.11. Density11.1 Determine the density of the plastic cement in accor-dance with Test Method C 188, using kerosine as the liquid.Use the density so determined in the calculation of the aircontent of the plaster.12. Blended S
22、and12.1 The sand shall be a blend of equal parts by weight ofgraded standard sand and standard 2030 sand conforming toSpecification C 778.13. Preparation of Plaster13.1 Proportions for PlasterPlaster for air entrainment,compressive strength, and water retention tests shall be pro-portioned to contai
23、n 1620 g of sand and a mass of cement, ingrams, as indicated in Table 2. The sand shall consist of 810 gof graded standard sand and 810 g of 2030 standard sand(Note 1). The quantity of water, measured in millilitres, shallbe such as to produce a flow of 110 6 5, as determined by TestMethod C 109/C 1
24、09M.NOTE 1Historically, field-mixed plaster has been proportioned byvolume measured in increments or fractions of 1 ft3. The comparablewhole SI-unit volume to 1 ft3is 28 L. The specified plaster proportionsapproximate the 1:3 nominal proportions by volume, commonly specifiedfor construction, on the
25、basis of the following assumed mass and volumerelationships:The mass of dry sand in 28 L of loose damp sand is 36 k.28 L of Type S Plastic (Stucco) cement has a mass of 35 kg.28 L of Type M Plastic (Stucco) cement has a mass of 42 kg.For example, the amount of cement needed to provide a 1:3 volumepr
26、oportion of cement to sand using a Type S Plastic (Stucco) cement is:TABLE 1 Physical RequirementsPlastic Cement Type SMFineness, residue on a 45-m (No. 325) sieve, max,% 24 24Autoclave expansion, max, % 1.0 1.0Time of setting, Gillmore method:Initial set, minutes, not less than 90 90Initial set, mi
27、nutes, not more than 1000 1000Compressive strength (average of three cubes):The compressive strength of mortar cubes, composed of 1 part cement and 3 parts blended sand(half graded standard sand and half standard 2030 sand) by volume, prepared and tested in accordancewith this specification, shall b
28、e equal to or higher than the values specified for the ages indicated below:7 days, MPa (psi) 9.0 (1300) 12.4(1800)28 days, MPa (psi) 14.5(2100)20.0(2900)Air content of mortar:Min, volume% 88Max, volume % 20 20Water retention value, min, %, of original flow 70 70C1328052A 5 1620 3 C/B! 5 1620 3 35/1
29、08! 5 525 (1)where:A = number of grams of cement to be used in the mortarwith 1620 g of sand,B =33 36 = 108 kg, the mass of dry sand in 84 (or3 3 28) L of loose damp sand, andC = mass of Type S Plastic (Stucco) cement per 28 L.13.2 Mixing of PlastersMix the plaster in accordancewith Practice C 305.1
30、3.3 Determination of FlowDetermine the flow in accor-dance with Test Method C 109/C 109M.14. Air Entrainment14.1 ProcedureIf the plaster has the correct flow, use aseparate portion of the plaster for the determination of en-trained air. Determine the mass of 400 mL of plaster inaccordance with Test
31、Method C 185.14.2 CalculationCalculate the air content of the plaster,and report it to the nearest 1 % as follows:D 5 W11 W21 Vw!/W1/S1! 1 W2/S2! 1 Vw#(2)A 5 100 2 Wm/4D!where:D = density of air-free plaster, g/cm3,W1= mass of cement, g,W2= mass of sand, g,Vw= mL-g of water used,S1= density of cemen
32、t, g/cm3,S2= density of standard sand, 2.65 g/cm3,A = volume percent of entrained air, andWm= mass of 400 mL of plaster, g.15. Compressive Strength15.1 Test Specimens:15.1.1 MoldingImmediately after determining the flowand mass of 400 mL of plaster, return all of the plaster to themixing bowl and re
33、mix for 15 s at the medium speed. Thenmold the test specimens in accordance with Test MethodC 109/C 109M, except that the elapsed time for mixing plaster,determining flow, determining air entrainment, and starting themolding of cubes shall be within 8 min.15.1.2 StorageImmediately after molding, sto
34、re all testspecimens in the molds on plane plates in a moist cabinet ormoist room for 48 to 52 h in such a manner that the uppersurfaces shall be exposed to the moist air. Then remove thecubes from the molds, and place them in the moist cabinet ormoist room for 5 days in such a manner as to allow fr
35、eecirculation of air around at least five faces of the specimens. Atthe age of 7 days, immerse the cubes for the 28-day tests insaturated lime water in storage tanks of noncorrodible materi-als.15.2 Procedure:15.2.1 Test the cube specimens immediately after theirremoval from the moist cabinet or moi
36、st room for 7-dayspecimens, and immediately after their removal from storagewater for all other specimens. If more than one specimen at atime is removed from the moist cabinet or moist room for7-day tests, cover these cubes with a damp cloth until the timeof testing.15.2.2 The remainder of the testi
37、ng procedure shall conformto Test Method C 109/C 109M.16. Water Retention16.1 Water retention shall be determined in accordance withthe procedures in Test Method C 1506, except wherever theterm “mortar” is used, read “plaster.”17. Storage17.1 The cement shall be stored in such a manner as topermit e
38、asy access for the proper inspection and identificationof each shipment, and in a suitable weathertight building thatwill protect the cement from dampness and minimize ware-house set.18. Inspection18.1 Adequate facilities shall be provided to the purchaserfor the necessary inspection and sampling.18
39、.2 All packages shall be in good condition at the time ofinspection.19. Rejection19.1 At the option of the purchaser, the cement shall berejected if it fails to meet any of the requirements of thisspecification.19.2 At the option of the purchaser, packages more than 2 %below the mass marked thereon
40、shall be rejected. At the optionof the purchaser, the entire shipment represented shall berejected if the average mass of packages in any shipment asshown by weighing 50 packages taken at random is less thanthat marked on the packages.19.3 At the option of the purchaser, cement remaining instorage p
41、rior to shipment for a period greater than six monthsafter testing shall be retested and, at the option of thepurchaser, shall be rejected if it fails to meet any of therequirements of this specification.20. Manufacturers Certification20.1 Upon request of the purchaser in the contract or order,a man
42、ufacturers report shall be furnished at the time ofshipment stating the results of the tests made on samples of thematerial taken during production or transfer and certifying thatthe applicable requirements of this specification have been met.21. Packaging and Package Marking21.1 When plastic cement
43、 is delivered in packages, thebrand, name of the manufacturer, net mass of the package in kg(see Note 2) shall be indicated plainly thereon. Similar infor-mation shall be provided in the shipping documents accompa-nying the shipment of plastic cement in bulk.NOTE 2To facilitate the change to SI unit
44、s, a standard SI package sizeTABLE 2 Cement in Laboratory Batch of PlasticPlastic (Stucco) Cement Type Mass of Cement, gS 525M 630C1328053of 35 Kg for Type S and 42 Kg for Type M will provide convenient massincrements reasonably similar to the traditional 77- and 94-lb packages.22. Keywords22.1 plas
45、ter; plastic cement; portland cement-based plaster;stuccoASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such paten
46、t 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 be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited eithe
47、r 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 theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair he
48、aring 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, West 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).C1328054
