1. Given the following two aggregate gradations shown in Table 1. plot individually on a semi-log scale and determine which ASTM C33 size number is appropriate for each. following chaum in Tabl

Structural Analysis
6th Edition
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Chapter2: Loads On Structures
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45
1.
2.
Given the following two aggregate gradations shown in Table 1. plot individually on a
semi-log scale and determine which ASTM C33 size number is appropriate for each.
Give the following two aggregate gradations shown in Table 1, determine the best
combined aggregate gradation using a 45 power curve. Include a neat, well-organized
spreadsheet with at least three possible combinations in addition to the original gradations and
state which combination you think is the most well-graded.
Table 1. Aggregates for blending
Sieve
1 in.
% in.
½ in.
3/8 in.
#4
#8
# 16
# 30
# 50
# 100
Percent Passing
100
80
60
80
40
60
20
40
20
0
Percent Passing
100
Aggregate 1 (%
passing)
0
100
100
68
41
6
3.0
2.3
2.1
2.0
1.9
Aggregate 2 (% passing)
100
100
100
100
99
93
76
2
3
Sieve Size Raised to 0.45 Power
Figure 1. Basis of 0.45 Power Chart (Source: Asphalt Institute SP-2)
45
14
1
Example:
4.75 mm sieve plots at (4.75) 0.45 = 2.02
OREK) ۹:۰۰ م | 0.5ك.ب/تا
max
size
-maximum density graciation
0
0 075 3 6 1.18 2.36 4.75 9.5 12.5 19.0
Sieve Size, mm, Rased to 0.45 Power
Figure 2. Maximum Density Gradation for 19mm Maximum Size (Source: Asphalt Institute
SP-2)
Transcribed Image Text:45 1. 2. Given the following two aggregate gradations shown in Table 1. plot individually on a semi-log scale and determine which ASTM C33 size number is appropriate for each. Give the following two aggregate gradations shown in Table 1, determine the best combined aggregate gradation using a 45 power curve. Include a neat, well-organized spreadsheet with at least three possible combinations in addition to the original gradations and state which combination you think is the most well-graded. Table 1. Aggregates for blending Sieve 1 in. % in. ½ in. 3/8 in. #4 #8 # 16 # 30 # 50 # 100 Percent Passing 100 80 60 80 40 60 20 40 20 0 Percent Passing 100 Aggregate 1 (% passing) 0 100 100 68 41 6 3.0 2.3 2.1 2.0 1.9 Aggregate 2 (% passing) 100 100 100 100 99 93 76 2 3 Sieve Size Raised to 0.45 Power Figure 1. Basis of 0.45 Power Chart (Source: Asphalt Institute SP-2) 45 14 1 Example: 4.75 mm sieve plots at (4.75) 0.45 = 2.02 OREK) ۹:۰۰ م | 0.5ك.ب/تا max size -maximum density graciation 0 0 075 3 6 1.18 2.36 4.75 9.5 12.5 19.0 Sieve Size, mm, Rased to 0.45 Power Figure 2. Maximum Density Gradation for 19mm Maximum Size (Source: Asphalt Institute SP-2)
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