Example: An asphalt concrete mix is being prepared using Marshall mix design method, as illustrated in the graphs. If Gb = 1.03, Gsh = 2.69, and Gmm = 2.61, then: %3D

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Example: An asphalt concrete mix is being prepared using Marshall mix design
method, as illustrated in the graphs. If Gb = 1.03, Gsb = 2.69, and Gmm = 2.61, then:
1. Calculate the optimum asphalt content (OAC), assume AC at 4% air voids =
5.5%.
164
2. Check the specifications at
143
20
20
20
AC= 6%, heavy traffic, and
256
the maximum aggregate size
250
= 1".
215
40 45 s0 1s 60
40 45 30 55 60
% AC BY WOt or MIX
3. Calculate the percent of air
% AC BY WOT. OF MIX
voids at 6% asphalt content.
2000
17
6000
IB00
7500
1700
ro00
"NI 001/1 - MO
wwazO MO
VN'A %
UNIT WEIGHT-ib/ft
MARSHALL STABILITY-LB.
Transcribed Image Text:Example: An asphalt concrete mix is being prepared using Marshall mix design method, as illustrated in the graphs. If Gb = 1.03, Gsb = 2.69, and Gmm = 2.61, then: 1. Calculate the optimum asphalt content (OAC), assume AC at 4% air voids = 5.5%. 164 2. Check the specifications at 143 20 20 20 AC= 6%, heavy traffic, and 256 the maximum aggregate size 250 = 1". 215 40 45 s0 1s 60 40 45 30 55 60 % AC BY WOt or MIX 3. Calculate the percent of air % AC BY WOT. OF MIX voids at 6% asphalt content. 2000 17 6000 IB00 7500 1700 ro00 "NI 001/1 - MO wwazO MO VN'A % UNIT WEIGHT-ib/ft MARSHALL STABILITY-LB.
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