Table Of Content,
This thesis having been approved by the
,
special Faculty Committee is accepted by
the Graduate School of the
,
University of Wyoming
in partial fulfillment of the requirements
for the degree of Master of Science__
_____
Dean of the Graduate School.
Date—MlY-^-lH0
____
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CORRELATION OF FLEXIBLE PAVEMENT
DESIGN METHODS
by
August E. Kuiper
A Thesis
Submitted to the Department of Civil and
Architectural Engineering and the Graduate School
of the University of Wyoming in Partial
Fulfillment of Requirements for the Degree of
Master of Science
lib r a r y
UNIVEhSI] OF WYOMING
i
LARAMIE
University of Wyoming
Laramie, Wyoming
July, 1950
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UMI Number: EP21920
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Ge!)&ra Roosa
ACKNOWLEDGEMENT
The author wishes to express his sincere appreciation to
Mr. J. H. Zoller, Assistant Professor of Civil Engineering, for
his assistance in preparation of the working plan of the investigation,
and. to Professor A. J. McGaw, Head, Civil and Architectural
Engineering, and Dr. H. S. Sweet, Assistant Professor of Civil
Engineering, for their review of the manuscript and their encourage
ment at all stages of the investigation. Mr. George Sylvester,
Instructor in English, reviewed the manuscript, and his assistance
is gratefully acknowledged.
Mr. D. J. Olinger, Engineer for the Wyoming State Highway
Department, contributed valuable suggestions and made arrangement
for taking the samples, and his assistance is gratefully acknowledged.
A. E. K.
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TABLE OF GONTENTS
Chapter Page
I. INTRODUCTION................................................................................. 1
II. GENERAL DISCUSSION OF SOIL TESTS............................ 4
III. REVIEW OF LITERATURE......................................................... II
Triaxial Compression T est........................ 11
California Bearing R a tio ...................................................... 13
Previous Data .................................................................. 14
IV. DESCRIPTION OF PROJECT........................ ‘ 17
V. SAMPLING PROCEDURE............................... 22
VI. TEST PROCEDURES..................................................................... 24
Mechanical Analysis . .................................... . . 24
Atterberg Limit .......................................................... . 25
Classification............................ 26
Moisture-density or Compaction ................................. 26
California Bearing Ratio . . . . . . . . . . . . . . 27
Triaxial Compression ........................ 34
VII. TEST RESULTS AND DISCUSSION........................... . . . 48
Mechanical Analysis ............................ 48
M oisture-density...................................................................... 53
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iv
Chapter Page
California Bearing R a tio ................................................. 53
Tristxial Compression................................................................... 56
VIII. DESIGN OF FLEXIBLE PAVEMENT................................. 58
CBR M ethods.................................................................. 58
Triaxial Compression Method - . . 59
Correlation Data........................................................ 66
IX. CONCLUSIONS AND RECOMMENDATIONS . . . . . . 77
BIBLIOGRAPHY.......................................................................... 82
SELECTED REFERENCES........................................................................... 85
APPENDIX................................ . . 88
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LIST OF FIGURES
Figure ‘ Page
1. Triaxial Compression Chamber . . .................................. 13
2. Correction of California Bearing Ratio Curves......... 31
3. Triaxial Compression Apparatus . . . . . . . . . . . . 44
4. Grain-size Curves for Samples 1, 2, 3 and-4. . . . . . 49
5. Grain-size Curves for Samples 5, 6, 7 and 1 2 ..... 50
6. Grain-size Curves for Samples 8, 9 and 10 . . . . . . . 51
7. Grain-size Curves for Samples 11 and 13 . . . ..... 52
8. Wyoming State Highway Design Curve..................•................. 60
9. Corps of Engineers Design Curve ................... 61
10. Pavement Thicknesses R equired................... 62
11. Traffic Coefficient C urve............................................................ 64
12. Stress-strain Curve.................................... . Z ............................ 65
13. Plot of Pavement Thickness Versus Percent Passing
200 Sieve ........................ 67
14. Plot of Pavement Thickness Versus Maximum Density. 69
15. Plot of Pavement Thickness Versus Optimum
Moisture Content........................ 70
16. Plot of Pavement Thickness Versus Plasticity Index . . 72
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vi
Figure Page
17. Plot of Pavement Thickness Required by the Triaxial
Compression Versus the Wyoming State Highway GBR 73
18. Plot of Pavement Thickness Required by the Triaxial
Compression Versus the Corps of Engineers CBR . . 74
19. Plot of Pavement Thickness Required by Wyoming
State Highway CBR Versus Corps of Engineers GBR. 75
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LIST OF PLATES
Plate Page
I. Photographs of Typical Terrain Encountered and the
Method of Lifting Sam ples...............................................................18
. 2. Photograph of Compaction Equipm ent.................. 28
3. Photograph of Penetration Set-up for CBR Penetration . 30
4. Photograph of CBR Test Equipment .................. . 32
5. Photograph of Unassembled Triaxial Test Equipment . . 36
6. Photograph of Compaction Set-up for Triaxial Com
pression Test Specimens.......................................................... 39
7. Photograph of Triaxial Compression Apparatus with
Sample Mounted for T esting...............................................•. 42
8. Photograph of Triaxial Compression Apparatus
Illustrating the Magnification Obtained with the Fluid 43
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