The sieving analysis of aggregate and filler used for the design of an asphaltic concrete mixture resulted the aggregate proportions shown below. If the bulk specific gravities of coarse aggregate, fine aggregate and filler used in this mixture are 2.60, 2.71, and 2.69. Determine the optimum asphalt content as a percentage by weight of total mix to produce an asphaltic concrete mixture complying with the specifications shown below. The test results obtained using the Marshall method and the maximum specific gravity of paving mixture are shown below. The specific gravity of asphalt is 1.02. Specifications: Min. %VMA=10.0%. Min. Stability=8 kN, Flow (mm)=2-4, % Air Voids=3-5%, Мах. % by weight Wt. of sample in air Wt. of sample in water % by wt. specific gravity of Aggregate Stability (kN) Flow of (mm) asphalt Coarse 45 (gm) (gm) mixture Fine 50 M. filler 4.0 1325.3 785.6 9.57 3.25 2.57 5 4.5 1330.1 793.3 9.80 3.50 2.55 5.0 1336.2 800.8 9.93 4.00 2.53 5.5 1342.0 804.5 9.70 5.00 2.51 6.0 1347.5 805.1 9.10 6.25 2.49
The sieving analysis of aggregate and filler used for the design of an asphaltic concrete mixture resulted the aggregate proportions shown below. If the bulk specific gravities of coarse aggregate, fine aggregate and filler used in this mixture are 2.60, 2.71, and 2.69. Determine the optimum asphalt content as a percentage by weight of total mix to produce an asphaltic concrete mixture complying with the specifications shown below. The test results obtained using the Marshall method and the maximum specific gravity of paving mixture are shown below. The specific gravity of asphalt is 1.02. Specifications: Min. %VMA=10.0%. Min. Stability=8 kN, Flow (mm)=2-4, % Air Voids=3-5%, Мах. % by weight Wt. of sample in air Wt. of sample in water % by wt. specific gravity of Aggregate Stability (kN) Flow of (mm) asphalt Coarse 45 (gm) (gm) mixture Fine 50 M. filler 4.0 1325.3 785.6 9.57 3.25 2.57 5 4.5 1330.1 793.3 9.80 3.50 2.55 5.0 1336.2 800.8 9.93 4.00 2.53 5.5 1342.0 804.5 9.70 5.00 2.51 6.0 1347.5 805.1 9.10 6.25 2.49
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter18: Bituminous Materials
Section: Chapter Questions
Problem 12P
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Transcribed Image Text:The sieving analysis of aggregate and filler used for the design of an asphaltic concrete
mixture resulted the aggregate proportions shown below. If the bulk specific gravities of
coarse aggregate, fine aggregate and filler used in this mixture are 2.60, 2.71, and 2.69.
Determine the optimum asphalt content as a percentage by weight of total mix to produce
an asphaltic concrete mixture complying with the specifications shown below. The test
results obtained using the Marshall method and the maximum specific gravity of paving
mixture are shown below. The specific gravity of asphalt is 1.02.
Transcribed Image Text:Specifications:
Min. %VMA=10.0%.
Min.
Stability=8
kN,
Flow
(mm)=2-4,
%
Air
Voids=3-5%,
Мах.
% by
weight
Wt. of
sample
in air
Wt. of
sample
in water
% by wt.
specific
gravity
of
Aggregate
Stability
(kN)
Flow
of
(mm)
asphalt
Coarse
45
(gm)
(gm)
mixture
Fine
50
M. filler
4.0
1325.3
785.6
9.57
3.25
2.57
5
4.5
1330.1
793.3
9.80
3.50
2.55
5.0
1336.2
800.8
9.93
4.00
2.53
5.5
1342.0
804.5
9.70
5.00
2.51
6.0
1347.5
805.1
9.10
6.25
2.49
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