1、4C29/C29M-16Sbulk specific gravity(dry basis)as determined insame operator on similar material should not differ by moreaccordance with Test Method C127 or Test Methodthan 40 kg/m32.5 Ib/ft(d2s).C128,and15.2.2 Multilaboratory Precision-The multilaboratoryW density of water,998 kg/m362.3 Ib/ftstandar
2、d deviation has been found to be 30 kg/m31.87 Ib/ft13.3 Volume of Measure-Calculate the volume of a mea-(1s).Therefore,results of two properly conducted tests fromtwo different laboratories on similar material should not differsure as follows:by more than 85 kg/m35.3 Ib/ft(d2s).V=(W-M/D(5)15.2.3 The
3、se numbers represent,respectively,the(1s)andF=D/(W-M)(6)(d2s)limits as described in Practice C670.The precisionestimates were obtained from the analysis of AMRL profi-where:ciency sample data for bulk density by rodding of normalVvolume of the measure,m3 ft3weight aggregates having a nominal maximum
4、 aggregate sizeWmass of the water,plate glass,and measure,kg lbof 25.0 mm 1 in.,and using a 14-L V2-ftmeasure.M=mass of the plate glass and measure,kg lbDdensity of the water for the measured temperature,15.3 Fine Aggregate(bulk density):kg/mlb/ft,and15.3.1 Single-Operator Precision-The single-opera
5、torFfactor for the measure,1/m31/ftstandard deviation has been found to be 14 kg/m0.88 Ib/ft(Is).Therefore,results of two properly conducted tests by the14.Reportsame operator on similar material should not differ by more14.1 Report the results for the bulk density to the nearest 10than 40 kg/m2.5 I
6、b/ft(d2s).kg/m3 1 Ib/ft3as follows:15.3.2 Multilaboratory Precision-The multilaboratory14.1.1 Bulk density by rodding,orstandard deviation has been found to be 44 kg/m32.76 Ib/ft14.1.2 Bulk density by jigging,or(1s).Therefore,results of two properly conducted tests from14.1.3 Loose bulk density.two
7、different laboratories on similar material should not differby more than 125 kg/m3 7.8 Ib/ft3(d2s).14.2 Report the results for the void content to the nearest15.3.3 These numbers represent,respectively,the(1s)and1 as follows:(d2s)limits as described in Practice C670.The precision14.2.1 Voids in aggr
8、egate compacted by rodding,%orestimates were obtained from the analysis of AMRL profi-14.2.2 Voids in aggregate compacted by jigging,%orciency sample data for loose bulk density from laboratories14.2.3 Voids in loose aggregate,%using a 2.8-L Vio-ftmeasure.15.Precision and Bias15.4 No precision data
9、on void content are available.However,as the void content in aggregate is calculated from15.1 The following estimates of precision for this testbulk density and bulk specific gravity,the precision of themethod are based on results from the AASHTO Materialsvoids content reflects the precision of thes
10、e measured param-Reference Laboratory(AMRL)Proficiency Sample Program,eters given in 15.2 and 15.3 of this test method and in Testwith testing conducted using this test method and AASHTOMethods C127 and C128.Method T 19/T19M.There are no significant differencesbetween the two test methods.The data a
11、re based on the15.5 Bias-The procedure in this test method for measuringbulk density and void content has no bias because the valuesanalyses of more than 100 paired test results from 40 to 100for bulk density and void content can be defined only in termslaboratories.of a test method.15.2 Coarse Aggr
12、egate(bulk density):15.2.1 Single-Operator Precision-The single-operator16.Keywordsstandard deviation has been found to be 14 kg/m0.88 Ib/ft16.1 aggregates;bulk density;coarse aggregate;density;(Is).Therefore,results of two properly conducted tests by thefine aggregate;unit weight;voids in aggregatesCopyright ASTM International
