IJSRD - International Journal for Scientific Research & Development| Vol. 3, Issue 09, 2015 | ISSN (online): 2321-0613
An Implication of Fatigue Concept on Design of Cement Concrete Pavement and its Critical Comparison with Other Methods Shri S.S Goliya1 Dr. K.K Pathak2 Dr. Y.P. Joshi3 Miss Tanu Chaturvedi4 1 Assistant Professor 2,3Professor 4Lecturer 1,2,3,4 Department of Civil Engineering 1,3,4 S.A.T.I, Vidisha (M.P) 2N.I.T.T.T.R, Bhopal (M.P) Abstract— Fatigue is the important aspect in the rigid pavement design. Due to applications of the heavy loads fatigue occurs in the pavement in the form of micro cracks. This research “An Implication of Fatigue Concept on Design of Cement Concrete Pavement and Its Critical Comparison with Other Methods” gives the concept of involvement of fatigue concepts which is an important parameter in cement concrete pavement and mainly failure occurs due to fatigue failure. therefore study has been done in order to study the fatigue concepts. IRC method of design shall be compared with Portland Cement Association (PCA), American Association of State Highway and Transportation Officials (AASHTO) and other available methods. The effect of the over loading of the truck on pavement design shall be analyzed .Temperature related stresses in designing the rigid pavement are important parameter. Therefore day & night temperature difference shall be work out. Best design method is being evolved and a significance of fatigue concept is consequence Concrete pavements fail in field due to improper design. Proper method of design shall be proposed to achieve higher life and economy in long run. Early failure of pavement is observed in field due to poor design, which is a great loss to society and big inconvenience to road user. Such situation shall be avoided through proper design of road based on the research work. Key words: Fatigue Concept, Cement Concrete Pavement I. INTRODUCTION Like conventional concrete and other engineering materials, CC pavement is subject to effects of fatigue. A fatigue failure occurs when a material ruptures under continued repetitions of loads that cause stresses less than the strength of material. Best design method is being evolved and a significance of fatigue concept is consequence Concrete pavements fail in field due to improper design. Proper method of design shall be proposed to achieve higher life and economy in long run. Early failure of pavement is observed in field due to poor design, which is a great loss to society and big inconvenience to road user. Such situation shall be avoided through proper design of road based on the research work. II. OBJECTIVES Fatigue method shall be compared by PCA method and AASHTO method. On the basis of this proper method could be evolved. These are the methods IRC Method (IRC:58 2011) PCA Method AASHTO Method. Effect of temperature stresses and overloading is analyzed.
III. COMPARISON OF THICKNESS Thickness of rigid pavement is compared the methods i.e. IRC58(2011), PCA and AASHTO (1993)methods comparison of pavement thickness is being done in order to analyze the better pavement thickness method i.e. the fatigue concept and temperature stresses method i.e. the IRC method as it contains the fatigue concept and the temperature stresses as per as Indian conditions. Axle is load spectrum taken of the kerela region from the IRC journal which consists of 2000cvpd. The details of the region is given below in the table Tandem Axle Tridem Axle Single Axle Loads Loads Loads Expected Expected Expected Loa Loa Load Repetitio Repetitio Repetitio d d ns ns ns >19.5 0 >40 0 >56 0 18.538530.64 2.14 0 19.5 40 56 17.536500.81 2.14 0 18.5 38 53 16.534470.80 2.14 0 17.5 36 50 15.532442.58 2.14 0 16.5 34 47 14.530412.58 4.28 0 15.5 32 44 13.528385.81 4.28 0 14.5 30 41 12.526355.81 12.85 0 13.5 28 38 11.5243211.82 12.85 0 12.5 26 35 10.5222911.82 10.71 0 11.5 24 32 9.5202612.52 10.72 0 10.5 22 29 18238.5-9.5 12.52 3.57 0 20 26 <8.5 32.29 <18 32.18 <23 0 Tota Tota Total 100.00 100.00 0.00 l l Table 1: Loads Type of Carriageway 2-lane Shoulders type Tied shoulder Design Life in Years 20 years Design Wheel Load 9700 kg Present Traffic Intensity 2000 Present Total No. of Axels in 1 1000 CVPD Direction Traffic Growth Rate 7.50%
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