Ele 45-9300 - Manual (Page 6)

International
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Website: www.eleusa.com
Distributor: ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
Website: www.eleint.co.uk
4
V. CALCULATIONS
If the test temperature is within +3
°
or -5
°
F of 77
°
F (+ 1.7
°
or - 2.8
°
C of 25
°
C),
the following equation can be used to determine the maximum specific gravity of
the sample, with an error of 0.001 points or less due to thermal effects:
Where:
A = Mass of the dry sample in air (grams)
D = Mass of container when filled with water at 77
°
F (25
°
C) (grams)
E = Mass of container filled with both water and sample at 77
°
F (25
°
C)
(grams)
Note: If the test temperature differs significantly from the recommended
77
°
F (25
°
C), the formula should be adjusted for thermal effect as
follows:
Where:
A = Mass of dry sample in air (grams)
F = Mass of pycnometer filled with water at test temperature (grams)
G = Mass of pycnometer filled with both water and sample at test
temperature (grams)
H = Correction for thermal expansion of bitumen (grams)
dw = density of water at test temperature, Mg/m
3
0.9970 = density of water at 77
°
F (25
°
C), Mg/m
3
Values of H and dw may be obtained from the ASTM graphs in Fig. 2. For more
details, see ASTM D 2041.
VI. TROUBLESHOOTING