A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Factors Affecting Deterioration of Transverse Cracks in Jointed Reinforced Concrete Pavements
Jointed reinforced concrete pavements (JRCP) develop transverse cracks as the drying and thermal shrinkage of the concrete is resisted by friction with the supporting layers. These cracks deteriorate with time and traffic due to loss of aggregate-interlock load transfer capacity. The report describes the first year of a laboratory investigation to determine the relative effects of a few selected factors (coarse aggregate type, gradation, and treatment) on transverse crack deterioration in JRCP. The work described herein focused on the development, execution, collection and analysis of load transfer data from the testing of a series of large-scale pavement test specimens that were subjected to repeated applications of loads simulating the passage of heavy truck traffic. Test results indicate that slabs cast using crushed limestone and natural gravel graded to meet Michigan Department of Transportation specification 6A (1.5 in top size, coarser gradation) perform comparably while specimens cast using similarly graded slag deteriorate much more rapidly. The use of more finely graded gravels meeting MDOT specification 17A (1.0 in top size, finer gradation) resulted in performance only slightly worse than that of the larger gravel. Finally, specimens using 100% recycled gravel concrete (6A gradation) or a blend of recycled gravel concrete and large crushed limesone (MDOT gradation 4A, 2.5 in top size) performed only slightly better than the slag specimen.
Factors Affecting Deterioration of Transverse Cracks in Jointed Reinforced Concrete Pavements
Jointed reinforced concrete pavements (JRCP) develop transverse cracks as the drying and thermal shrinkage of the concrete is resisted by friction with the supporting layers. These cracks deteriorate with time and traffic due to loss of aggregate-interlock load transfer capacity. The report describes the first year of a laboratory investigation to determine the relative effects of a few selected factors (coarse aggregate type, gradation, and treatment) on transverse crack deterioration in JRCP. The work described herein focused on the development, execution, collection and analysis of load transfer data from the testing of a series of large-scale pavement test specimens that were subjected to repeated applications of loads simulating the passage of heavy truck traffic. Test results indicate that slabs cast using crushed limestone and natural gravel graded to meet Michigan Department of Transportation specification 6A (1.5 in top size, coarser gradation) perform comparably while specimens cast using similarly graded slag deteriorate much more rapidly. The use of more finely graded gravels meeting MDOT specification 17A (1.0 in top size, finer gradation) resulted in performance only slightly worse than that of the larger gravel. Finally, specimens using 100% recycled gravel concrete (6A gradation) or a blend of recycled gravel concrete and large crushed limesone (MDOT gradation 4A, 2.5 in top size) performed only slightly better than the slag specimen.
Factors Affecting Deterioration of Transverse Cracks in Jointed Reinforced Concrete Pavements
M. B. Snyder (author) / Z. I. Raja (author)
1991
120 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Pavement joints , Concrete pavements , Reinforced concrete , Cracking(Fracturing) , Pavement damage , Deterioration , Concrete durability , Loads(Forces) , Aggregates , Pavement deflections , Mechanical properties , Limestone , Slags , Road materials
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