CET-3120 Advanced Construction Materials Quiz No. 5

UNIVERSITY OF TOLEDO COLLEGE OF ENGINEERINGENGINEERING TECHNOLOGY DEPT.

Name:

CET-3120 Advanced Construction MaterialsQuiz No. 5

Open Book & Notes

A quarrying operation will require a several large hauling vehicles to remove the rockfrom the pit and transport it to the crushing machines. Determine the structural number(SN) for a flexible pavement for the following criteria and loading. (Show your work onthis sheet and the attached homograph.) What thickness of ODOT Item 301 AsphaltConcrete Base would be needed if it were to be used as the only asphalt course for thishaul road if placed on 8" of Item 304 Aggregate Base?

172,000 loaded passes of trucks over the life of the pit.

Assume SN=3 for a starting point for axle load conversions.

CBR=8.33 R=70% pt=2.0

MR= /ÿ,ÿ;ÿ/ÿ" W18= ÿ",fYtÿt,ÿ'dÿ,

ODOT Item 301 thickness = ÿ h,

&PSI = ÿ, ÿ' " 2,0 =ÿ. ÿ"

SN (Graph) =

62k 58k 24kIf,'7 /O, "7 '/3'

D"? 301 Asphalt Conc. Base

8" 304 Aggregate Base

Proposed Pavement Section

SPRING 2020 CET-3120Advanced Construction Materials


Table D.1, Axle load equivalency factors for flexible pavements,single axles and Pt of 2,0,

Axle Pavement Structural Numbar (SN)Load(kipl) 1 2 3 4 6 6i

2 .0002 .0002 °0002 .0002 .0002 .00024 .002 .003 .002 .002 .002 .0026 .009 .012 .011 .010 .009 .0098 .030 .036 .036 .033 .031 .029

10 .075 .085 .090 .085 .079 .07612 .166 .177 .189 .183 .174 .18814 .326 .338 .354 .350 .338 .33116 .689 .598 .613 .612 .603 .59518 1.00 1.00 1.00 1.00 1.00 1.0020 1.81 1.69 1.56 1.55 1.57 1.5922 2.49 2.44 ÿ 2.31 2.36 2.4124 3.71 3.52ÿ 3.33 3.40 3.5126 5.38 6.21 4.68 4.77 4.9628 7.54 7.31 8.78 6.42 6.52 8.8330 10.4 10.0 9.2 8.8 8.7 9.232 14;0 13.5 12.4 11.6 11.5 12.134 18.5 17.9 18.3 16.0 14.9 15.638 24.2 23.3 .21.2 19.3 19.0 19.938 31.1 29.9 27.1 24.6 24.0 25.140 39.6 38.0 34.3 30.9 30.0 31.242 49.7 47.7 43.0 38.6 37.2 38.644 81.8 69.3 53.4 47.6 45.7 47.148 76.1 73.0 65.6 58.3 55.7 57.048 92.9 89.1 80.0 70.9 57.3 88.650 113. 108. 97. 88. 81. 82.

Table D.2. Axle load equivalency factors for flexible pavements,tandem axles and Pt of 2.0.

AxleLoad(kips)

Pavement Structural Number {SN}

1 2 3 4 6 6

50 6,15 5.99 5,64 5.44 5,56 5.7752 7,37 7.16 6,71 6,43 6.56 6.8354 8.77 8.51 7.93 7.55 7.69 8.0358 10.4 10.1 ÿ 8,6 9,0 9.458 12.2 11.8ÿ 10.3 10.4 10.960 14.3 13.8 11.9 12,0 12,662 16.6 16.0 13.7 13.8 14.664 19.3 18.6 15.8 15.8 16.666 22.2 21.4 19.6 16.0 18,0 18.968 26.5 24.6 22,4 20.6 20,5 21.570 29.2 28.1 25.6 23.4 23.2 24.372 33.3 32,0 29.1 26.6 26.2 27.474 37.8 36.4 33,0 30.0 29,4 30.876 42.8 41.2 37.3 33.8 33.1 34.578 48.4 46,5 42.0 38.0 37.0 38.680 54,4 52,3 47,2 42,5 41,3 43,082 61.1 58,7 52.9 47.6 46.0 47,884 68,4 65.7 59.2 53.0 51,2 53.086 76.3 73,3 66.0 59.0 56.8 58,688 8&o 81.6 73.4 65.5 62.8 64.790 94.4 90.6 81.5 72.6 69.4 71.3



Flexible Pavement Design ChartSegment I

402-2July 2008

Reference Section & Figure402, 402.1 (step 3)

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Sÿngle Axle Iÿqad ÿ11171 ÿ 1 ' 11311

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Flexible Pavement Design ChartSegment 2

402-3July 2008

Reference Section & Figure402, 402.1 (step 3)

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9 8 7 6 5 4 3 2Design Structure Number, SN

Example:APSI = 2.0

:Solul-ion" SN = 4.5



CET-3120

Name: /ÿ7

Advanced Construction MaterialsQuiz No. 5

Open Book & Notes

A quarrying operation will require a several large hauling vehicles to remove the rockfrom the pit and transport it to the crushing machines. Determine the structural number(SN) for a flexible pavement for the following criteria and loading. (Show your work onthis sheet and the attached nomograph.) What thickness of ODOT Item 301 AsphaltConcrete Base would be needed if it were to be used as the only asphalt course for thishaul road if placed on 10" of Item 304 Aggregate Base?

129,000 loaded passes of trucks over the life of the pit.

Assume SN=4 for a starting point for axle load conversions.

CBR=3.33 R=70% pt=2.0 APSI = ÿ" "ÿ'- 20 =" ÿ. ÿ"

MR= 'ÿ:2,d'ÿ l'' W18= ÿt'j ÿdÿIÿ SN (Graph) = ÿ.'ÿ

ODOT Item 301 thickness = ÿ / t

64k 60k 24k

D"? 301 Asphalt Conc. Base

10" 304 Aggregate Base

Proposed Pavement Section

/S-



TableD.I, Axle load equivalency feotors for flexible pavements,single axles and Pt of 2.0,.

Axle Pavemant Structural Number (SN)Load(kips) 1 2 3 (4j) 5

2 .0002 ,0002 ,0002 ,0002 .0002 .00024 .002 .003 .002 .002 .002 .0026 .009 .012 ,011 .010 .009 .0098 .030 .035 ,03S .033 .031 ,029

10 .075 .085 .090 .085 ,079 .07612 ,166 ,177 .189 .183 .174 .15814 .325 238 .354 .350 .338 .33115 ,599 .698 .613 .812 .603 ,598.18 1.00 1.00 . 1.00 1,(30 1.00 1.0020 1.81 1.89 1.58 1.65 1.57 1.5922 2.49 2.44 2.36 ÿ 2.3ÿ 2.4124 3.71 3.52 3.43ÿ 3.40 3.5126 6.35 5.21 4.88 4.77 4.9828 7.54 7.31 5,78 6,42 6,52 8.8330 10.4 10.0 9.2 8,6 8,7 9,232 14.0 13.6 12.4 11.5 11.5 12.134' 18.5 17.9 16.3 15.0 14.9 16.635 24.2 23.3 21.2 19.3 19.0 19.938 31.1 29.9 27.1 24,8 24.0 25,140 39.S 38.0 34.3 30.9 30.0 31.242 49.7 47.7 43.0 38.6 37.2 38.544 81.8 69.3 63.4 47.6 45,7 47.148 76.1 73.0 65,5 58.3 55,7 57.048 92.9 89.! 80.0 70.9 67.3 88.650 113. 108. 97. 88. 81. 82.

Table D.2.

AxleLoad(kips)

Axle load equivalency factors for flexible pavements,tandem axles and.Pt of 2.0.

Pavement Structural Number (SN}

1 2 3 /#'ÿ ) 6 6

50 6,15 5.99 5.64 5.44 5.55 5.7752 7.37 7.16 6_.71 6.43 6.56 6.8354 8.77 8.51 7.93 7.55 7.69 8.0356 10.4 10.1 9.3 8,8 9.0 9.458 12.2 11.8 10.9 ÿ 10.4 10,960 14.3 13.8 12.7 ('11,9.,' 12.0 12,862 16.6 16.0 14.7ÿ 13.8 .14.664 19,3 18.6 17.0 15,8 16.666 22.2 21.4 19.6 t8;O 18.0 " 18,968 25.5 24.6 22.4 20.6 20,5 21.6

• 70 29,2 28.1 25.6 23.4 23,2 24.372 33.3 32.0 29.1 26.6 26,2 27.474 37.8 36.4 33.0 30.0 29.4 30.876 42.8 41.2 37.3 33,6 33.1 34.578 48.4 46.5 42.0 38.0 37.0 38,680 54,4 52.3 47.2 42.5 41.3 43.082 61.1 58.7 62.9 47.6 46.0 47,884 68,4 65.7 59.2 53.0 51.2 53,086 76.3 73.3 66.0 59.0 56.8 58.688 85.0 81.6 73.4 65.5 62.8 64.790 94.4 90,6 81.5 72,6 69.4 71.3



Flexible Pavement Design ChartSegment I

402-2July 2008

Reference Section & Figure402, 402-1(step 3)

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Flexible Pavement Design ChartSegment 2

402-3July 2008

Reference Section & Figure402, 402-1 (step 3)

I00Design Serviceobility Loss, A PSI

90

80

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o 4O4-- (39)

30

20

10

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9 8 7 6 5 4 3 2Design Sfrucfure Number, SN

Exomple:APS! = 2.0

Solulion" SN = 4.5


CET-3120 Advanced Construction Materials Quiz No. 5

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