ASTM C979 C979M-2010 Standard Specification for Pigments for Integrally Colored Concrete《彩色混凝土整体用颜料标准规格》.pdf
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1、Designation: C979/C979M 10Standard Specification forPigments for Integrally Colored Concrete1This standard is issued under the fixed designation C979/C979M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the basic requirement forcolored and white pigments in powder form to be used asadmixtures in concrete for
3、 the purpose of producing integrallycolored concrete. Where the pigments are a constituent of amulticomponent admixture, this specification applies to thepigment constituent of the admixture. This specification is notintended to establish compatibility of pigments with any otherconcrete admixtures u
4、nless they are tested in combination inaccordance with 4.7.1.2 This specification does not include the determination ofpigment stability when elevated temperature using low-pressure (atmospheric) or high-pressure (autoclave) steam isused to accelerate the curing process.1.3 In addition to tests defi
5、ning the pigments themselves, alimited number of tests on concrete are included to define theeffects on setting times, air content, and compressive strength.If more extensive information is required for a particular job,additional testing criteria and procedures should be agreedupon between the sell
6、er and user.1.4 The maximum prescribed dosage rate of a pigment,established in accordance with 4.7, shall be equal to or lessthan 10 mass % of cement. When a combination of pigments isused to produce the desired color and color intensity, the totaldosage rate of all pigments combined shall not excee
7、d any ofthe individual maximum dosage rates of the component pig-ments.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other.
8、Combiningvalues from the two systems may result in non-conformancewith the standard. Some values have only SI units becauseinch-pound equivalents are not used in practice.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength
9、 of Cy-lindrical Concrete SpecimensC125 Terminology Relating to Concrete and Concrete Ag-gregatesC143/C143M Test Method for Slump of Hydraulic-CementConcreteC150 Specification for Portland CementC173/C173M Test Method for Air Content of FreshlyMixed Concrete by the Volumetric MethodC192/C192M Practi
10、ce for Making and Curing ConcreteTest Specimens in the LaboratoryC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC260 Specification for Air-Entraining Admixtures for Con-creteC403/C403M Test Method for Time of Setting of ConcreteMixtures by Penetration ResistanceD50
11、 Test Methods for Chemical Analysis of Yellow, Or-ange, Red, and Brown Pigments Containing Iron andManganeseD1208 Test Methods for Common Properties of CertainPigmentsD1535 Practice for Specifying Color by the Munsell SystemG23 Practice for Operating Light-Exposure Apparatus(Carbon-Arc Type) With an
12、d Without Water for Exposureof Nonmetallic Materials32.2 ACI Standards:211.1 Recommended Practice for Selecting Proportions forNormal and Heavyweight Concrete41This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of Su
13、bcommitteeC09.23 on Chemical Admixtures.Current edition approved Dec. 1, 2010. Published January 2011. Originallyapproved in 1982. Last previous edition approved in 2005 as C979 05. DOI:10.1520/C0979_C0979M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custo
14、mer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.4Available from American Concrete Institute (ACI), P.O.
15、Box 9094, FarmingtonHills, MI 48333-9094, http:/www.concrete.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 Defintions:3.2 For definitions of terms used in this specification, referto Terminology C125.4. Genera
16、l Requirements4.1 Water WettabilityThe pigment shall be water wettablewhen tested in accordance with 8.1.4.2 Alkali ResistanceThe pigment treated with sodiumhydroxide shall not show any significant (Note 1) change ofcolor when tested in accordance with 8.2.4.3 Total SulfatesCalculated as SO3, the su
17、lfates shall notexceed 5.0 mass % of the original pigment sample when testedin accordance with 8.3.4.4 Water SolubilityThe total matter soluble in water shallnot exceed 2.0 mass % of the original pigment sample whentested in accordance with 8.4.4.5 Atmospheric Curing StabilityThe magnitude of colord
18、ifferences between pigmented concrete specimens cured indry air and those cured at high relative humidity when tested inaccordance with 8.5 shall not be greater than the magnitude ofthe color difference between two unpigmented specimenscured under the same conditions.4.6 Light ResistanceThe exposed
19、portions of the speci-mens shall show no significant differences (Note 1) in colorfrom the unexposed portions when tested in accordance with8.6. While a pigment that fails this test shall not be consideredlight resistant, a pigment that passes this test may still besubject to fading when exposed to
20、natural weathering condi-tions.NOTE 1A significant difference is defined as one that is readilyperceptible by visual observation without close examination. Lighting andviewing conditions as described in Practice D1535, 6.1, may be used.4.7 Effects on Concrete:4.7.1 When compared with the control mix
21、ture, the concretethat is pigmented at the maximum prescribed dosage rate shallhave a 28-day compressive strength of not less than 90 % anda water-cement ratio of not greater than 110 % of that of thecontrol mixture when prepared and tested in accordance with8.7 (Note 2).4.7.2 The pigment, when adde
22、d to a concrete mixture at themaximum prescribed dosage rate, shall neither accelerate theinitial or final set by more than 1 h nor retard the initial or finalset by more than 112 h, as compared to the uncolored concretecontrol mixture when tested in accordance with 8.7 (Note 2).4.7.3 Using the same
23、 quantity of air-entraining admixture,the pigments, when added to a concrete mixture at themaximum prescribed dosage rate, shall not change the aircontent by more than 1.0 %, as compared to the uncoloredcontrol mixture when tested in accordance with 8.7.NOTE 2These values include allowance for norma
24、l variations in testresults. The object of the 90 % compressive-strength requirement is torequire a level of performance of the pigmented concrete comparable tothat of the reference concrete when tested in accordance with 8.7.4.8 Color Match of ShipmentThe color produced by theshipment of pigment sh
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