specific gravity and absorption of fine aggregate - Nebraska ...

More documents

Recommendations

Info

NDR T 842011Page 8 of 9Table 1 PrecisionStandardDeviation(1S) AAcceptableRange ofTwo Results(D2S) ASingle Operator Precision:Bulk specific gravity (dry) 0.011 0.032Bulk specific gravity (SSD) 0.0095 0.027Apparent specific gravity 0.0095 0.027Absorption B , percent 0.11 0.31Multilaboratory Precision:Bulk specific gravity (dry) 0.023 0.066Bulk specific gravity (SSD) 0.020 0.056Apparent specific gravity 0.020 0.056Absorption B , percent 0.23 0.660A These numbers represent, respectively , the (1S) and D2S) limits asdescribed in ASTM C 670. The precision estimates were obtained from theanalysis of combined AASHTO Materials Reference Laboratory referencesample data from laboratories using 15- to 19-hour saturation times andother laboratories using 24 ± 4 hours saturation time. Testing was performedon normal weight aggregates, and started with aggregates in the oven-drycondition.B Precision estimates are based on aggregates with absorptions of less than1 percent and may dif fer for manufacturered fine aggregates and fineaggregates having absorption values greater than 1 percent.
NDR T 842011Page 9 of 9APPENDIX (Nonmandatory Information)X1. Interrelationships between specific gravities and absorption as defined in Methods T 84and T 85X1.1 Let:S d = bulk specific gravity (dry-basis),S s = bulk specific gravity (SSD-basis),S a = apparent specific gravity, andA = absorption in percentThen:(1) S d = ( 1 + A / 100 ) S d1 = S d(2) S a = –––––––––––– ––––––––––––1 - A 1 - AS d—— —— ———S d 100 100or1(2a) S a = —————————————1 + A/100 A—————— ———S s 100Ss= ——————A1 - ———— (S s - 1)100(3)(S s)A = ——— - 1 100S d(4)(S s - S s)A = —————— 100S d ( S s - 1 )
Page 5 and 6: NDR T 842011Page 5 of 9fill with ad
Page 7: NDR T 842011Page 7 of 99.1.1 If the

specific gravity and absorption of fine aggregate - Nebraska ...

Create successful ePaper yourself

Delete template?

Save as template?