2.9.2 Given are sieve analysis results for materials to be blended for AC 14 mix required grading. i. Find the correct proportion for each aggregate stockpile to meet the r grading for the proposed AC 14 mix. ii. Calculate the specific gravity of the blended aggregates. Material BS Sieve 200 mm AC 14 100 Stockpile A SG = 2.565 100 Stockpile B SG = 2.654 % passing 100 Stockpile C SG = 2.714 100

Traffic and Highway Engineering
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Chapter18: Bituminous Materials
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Problem 8P: Given four different types of aggregates to be used to produce a blended aggregate for use in the...
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2.9.2 Given are sieve analysis results for materials to be blended for AC 14 mix along with the
required grading.
i.
Find the correct proportion for each aggregate stockpile to meet the required
grading for the proposed AC 14 mix.
Calculate the specific gravity of the blended aggregates.
ii.
Material
Percent Passing, %
BS Sieve
20.0 mm
14.0 mm
10.0 mm
5.0 mm
3.35 mm
1.18 mm
425 um
150 um
75 um
100
90
80
70
60
50
40
30
20
10
0
0.01
AC 14
100
90 - 100
76-86
50 - 62
40-54
18-34
12-24
6-14
4-8
0.10
Stockpile A
SG = 2.565
100
92.6
48.8
22.9
2.9
1.7
0
0
0
Stockpile B
SG = 2.654
% passing
100
100
98.2
45.4
30.4
12
6.7
2.3
0
1.00
Sieve Size, mm
Stockpile C
SG = 2.714
100
100
100
93.4
76.8
51.2
29.4
13.7
4.5
10.00
Stockpile D
SG = 3.200
100
100
100
100
100
100
100
98.4
88.9
100.00
Transcribed Image Text:2.9.2 Given are sieve analysis results for materials to be blended for AC 14 mix along with the required grading. i. Find the correct proportion for each aggregate stockpile to meet the required grading for the proposed AC 14 mix. Calculate the specific gravity of the blended aggregates. ii. Material Percent Passing, % BS Sieve 20.0 mm 14.0 mm 10.0 mm 5.0 mm 3.35 mm 1.18 mm 425 um 150 um 75 um 100 90 80 70 60 50 40 30 20 10 0 0.01 AC 14 100 90 - 100 76-86 50 - 62 40-54 18-34 12-24 6-14 4-8 0.10 Stockpile A SG = 2.565 100 92.6 48.8 22.9 2.9 1.7 0 0 0 Stockpile B SG = 2.654 % passing 100 100 98.2 45.4 30.4 12 6.7 2.3 0 1.00 Sieve Size, mm Stockpile C SG = 2.714 100 100 100 93.4 76.8 51.2 29.4 13.7 4.5 10.00 Stockpile D SG = 3.200 100 100 100 100 100 100 100 98.4 88.9 100.00
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