Civil Engineering Reference
In-Depth Information
Table 6.1 Properties of aggregates
Coarse aggregate (ASTM C127)
Bulk specifi c gravity, g/cm 3
2.698
Apparent specifi c gravity, g/cm 3
2.714
Absorption, %
0.33
Fine aggregate (ASTM C128)
Bulk specifi c gravity, g/cm 3
2.683
Apparent specifi c gravity, g/cm 3
2.735
Absorption, %
0.62
Filler (ASTM D854)
Apparent specifi c gravity, g/cm 3
2.743
Los Angeles Abrasion, % (ASTM C131)
23.57
Polishing value (BS813)
0.47
Table 6.2 Properties of bitumen
Softening point
54
Penetration grade at 5°C
63
Flash point
243
Penetration index
+
0.4
Ductility at 25°C
>
100 cm
Fraass breaking point
14
Loss of heating
0.05%
Density
1.035
Viscosity
at 50°C
250,000
at 60°C
100,000
at 72°C
20,000
Maltens
75%
Asphaltenes
27.2%
￿ ￿ ￿ ￿ ￿ ￿
100
80
Upper limit
60
40
Lower limit
20
0
0.01
0.1
1
10
100
Particle size (mm)
6.3 Aggregate grading.
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