ASTM C128-2012 Standard Test Method for Density Relative Density (Specific Gravity) and Absorption of Fine Aggregate《细集料的密度 相对密度(比重) 吸收性的标准试验方法》.pdf
《ASTM C128-2012 Standard Test Method for Density Relative Density (Specific Gravity) and Absorption of Fine Aggregate《细集料的密度 相对密度(比重) 吸收性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C128-2012 Standard Test Method for Density Relative Density (Specific Gravity) and Absorption of Fine Aggregate《细集料的密度 相对密度(比重) 吸收性的标准试验方法》.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C128 12Standard Test Method forDensity, Relative Density (Specific Gravity), and Absorptionof Fine Aggregate1This standard is issued under the fixed designation C128; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the
3、determination of the averagedensity of a quantity of fine aggregate particles (not includingthe volume of voids between the particles), the relative density(specific gravity), and the absorption of the fine aggregate.Depending on the procedure used, the density, in kg/m3(lb/ft3)is expressed as oven-
4、dry (OD), saturated-surface-dry (SSD), oras apparent density. Likewise, relative density (specific grav-ity), a dimensionless quality, is expressed as OD, SSD, or asapparent relative density (apparent specific gravity). The ODdensity and OD relative density are determined after drying theaggregate.
5、The SSD density, SSD relative density, and absorp-tion are determined after soaking the aggregate in water for aprescribed duration.1.2 This test method is used to determine the density of theessentially solid portion of a large number of aggregateparticles and provides an average value representing
6、 thesample. Distinction is made between the density of aggregateparticles as determined by this test method, and the bulkdensity of aggregates as determined by Test Method C29/C29M, which includes the volume of voids between theparticles of aggregates.1.3 This test method is not intended to be used
7、for light-weight aggregates that comply with Specification C332 GroupI aggregates.1.4 The values stated in SI units are to be regarded as thestandard for conducting the tests. The test results for densityshall be reported in either SI units or inch-pound units, asappropriate for the use to be made o
8、f the results.1.5 The text of this test method references notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and figures) shall not beconsidered as requirements of this test method.1.6 This standard does not purport to address all of thesafety
9、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.2. Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Densi
10、ty (“Unit Weight”)and Voids in AggregateC70 Test Method for Surface Moisture in Fine AggregateC117 Test Method for Materials Finer than 75-m (No. 200)Sieve in Mineral Aggregates by WashingC125 Terminology Relating to Concrete and Concrete Ag-gregatesC127 Test Method for Density, Relative Density (Sp
11、ecificGravity), and Absorption of Coarse AggregateC330 Specification for Lightweight Aggregates for Struc-tural ConcreteC332 Specification for Lightweight Aggregates for Insulat-ing ConcreteC188 Test Method for Density of Hydraulic CementC566 Test Method for Total Evaporable Moisture Contentof Aggre
12、gate by DryingC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC702 Practice for Reducing Samples of Aggregate to Test-ing SizeD75 Practice for Sampling AggregatesD854 Test Methods for Specific Gravity of Soil Solids byWater Pycnometer2.2 AASHTO Sta
13、ndard:AASHTO No. T 84 Specific Gravity andAbsorption of FineAggregates33. Terminology3.1 Definitions:1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.20 on Normal Weight Aggregates.Current edition
14、 approved April 1, 2012. Published May 2012. Originallyapproved in 1936. Last previous edition approved in 2007 as C12807a. DOI:10.1520/C0128-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards
15、volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Association of State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.1Copyright ASTM International, 100 Barr
16、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.1 absorption, nthe increase in mass of aggregate dueto water penetrating into the pores of the particles, during aprescribed period of time but not including water adhering tothe outside surface of the particles, express
17、ed as percentage ofthe dry mass.3.1.2 density, nthe mass per unit volume of a material,expressed as kilograms per cubic metre (pounds per cubicfoot).3.1.2.1 density (OD), nthe mass of oven-dry aggregateparticles per unit volume of aggregate particles, including thevolume of permeable and impermeable
18、 pores within particles,but not including the voids between the particles.3.1.2.2 density (SSD), nthe mass of saturated-surface-dryaggregate per unit volume of the aggregate particles, includingthe volume of impermeable pores and permeable, water-filledpores within the particles, but not including t
19、he voids betweenthe particles.3.1.2.3 apparent density, nthe mass per unit volume of theimpermeable portion of the aggregate particles.3.1.3 oven-dry (OD), adjrelated to aggregate particles,the condition in which the aggregates have been dried byheating in an oven at 110 6 5 C for sufficient time to
20、 reach aconstant mass.3.1.4 relative density (specific gravity), nthe ratio of thedensity of a material to the density of water at a statedtemperature; the values are dimensionless.3.1.4.1 relative density (specific gravity), (OD), nthe ratioof the density (OD) of the aggregate to the density of wat
21、er ata stated temperature.3.1.4.2 relative density (specific gravity), (SSD), nTheratio of the density (SSD) of the aggregate to the density ofwater at a stated temperature.3.1.4.3 apparent relative density (apparent specific gravity),nthe ratio of the apparent density of aggregate to the densityof
22、water at a stated temperature.3.1.5 saturated-surface-dry (SSD), adjrelated to aggre-gate particles, the condition in which the permeable pores ofaggregate particles are filled with water to the extent achievedby submerging in water for the prescribed period of time, butwithout free water on the sur
23、face of the particles.3.1.6 For definitions of other terms related to aggregates seeTerminology C125.4. Summary of Test Method4.1 A sample of aggregate is immersed in water for 24 6 4h to essentially fill the pores. It is then removed from the water,the water is dried from the surface of the particl
24、es, and themass determined. Subsequently, the sample (or a portion of it)is placed in a graduated container and the volume of the sampleis determined by the gravimetric or volumetric method. Finally,the sample is oven-dried and the mass determined again. Usingthe mass values thus obtained and formul
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