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Articles 2191 - 2220 of 2796
Full-Text Articles in Civil and Environmental Engineering
An Investigation Of Low-Strength Concrete And Resulting Structural Failure In A Bridge Deck, James H. Havens
An Investigation Of Low-Strength Concrete And Resulting Structural Failure In A Bridge Deck, James H. Havens
Kentucky Transportation Center Research Report
This investigation concerns the discovery of weak concrete in a portion of the deck of the Elkhorn City bridge, APD 640(4), within a year after it was opened to traffic. The deck concrete was placed between April 14 and June 14, 1968. The bridge serves heavy coal-trucks traffic. Failures occurred in the eastern-most span (No. 5) in April or May of 1969, Undoubtedly, the heavy loading contributed to early disclosure of defective concrete.
A preliminary investigation was made in May 1969, and reported by memorandum May 21, 1969. The bottom third or half of concrete in the affected portion, Span …
Locating And Tracing Seepage Water In Unstable Slopes, Yasin A. Alkhoja, Gordon D. Scott
Locating And Tracing Seepage Water In Unstable Slopes, Yasin A. Alkhoja, Gordon D. Scott
Kentucky Transportation Center Research Report
With the increase in modern highway construction, the occurrence of landslides has been growing proportionally due to the use of deeper cuts and higher fills. It has been observed that landslides on highways often occur in fills on hillsides. Accumulation of water in the embankment, usually seeping from a nearby hill, may reduce the shear strength of the embankment soil and result in failure at a later time. Many landslides on Kentucky highways have occurred a few years after construction and obviously have been caused by the gradual weakening of the embankment due to a damming and accumulation of water. …
Slip-Form Paving, Kerry P. Magan
Slip-Form Paving, Kerry P. Magan
Kentucky Transportation Center Research Report
The proper placement, consolidation, and finishing of low-slump concrete without the aid of pre-erected side, forms has been widely acclaimed as an economical and effective procedure in the construction of portland cement concrete pavements. This construction procedure, commonly referred to as slip-form paving, depends upon the ability of low-slump concrete to remain in place after consolidation and removal of forms.
Slip-form pavers differ from conventional pavers in that no fixed side forms are required inasmuch as the slip-form paver has side forms that advance with the machine. Concrete is merely deposited on the prepared subgrade in front of the machine, …
Final Performance Report On Experimental Use Of Thermoplastic Pavement-Striping Materials, Assaf S. Rahal, Ronald D. Hughes
Final Performance Report On Experimental Use Of Thermoplastic Pavement-Striping Materials, Assaf S. Rahal, Ronald D. Hughes
Kentucky Transportation Center Research Report
This study was undertaken in order to: 1) evaluate the performance of thermoplastic striping materials, 2) compare their performance on both portland cement concrete and bituminous concrete pavements to that of conventional traffic paints, and 3) to evaluate the economics of thermoplastics in terms of cost per mile per day of useful life. The performance of two brands of thermoplastic striping materials and conventional traffic paints applied at nine test sites in both rural and urban areas is reported herein. Application procedures, site locations, repair histories and materials specifications are included. Accumulative costs for each material at all sites for …
Slurry Seal Maintenance Applications, Robert L. Florence, Herbert F. Southgate
Slurry Seal Maintenance Applications, Robert L. Florence, Herbert F. Southgate
Kentucky Transportation Center Research Report
A slurry seal mixture consists of graded fine aggregate (normally minus 3/8-inch material), mixing grade emulsified asphalt (SS-1 or SS-lH), and water. The water is added to aid in mixing and to provide a free-flowing consistency so that the mixture can be spread in thin layers on the surface of an existing pavement. After the mixture is spread, the water evaporates and the remaining material, aggregate and base asphalt, forms a thin seal on the pavement surface which resembles a fine-grained asphaltic-concrete surface. As a result of the free-flowing consistency and the fineness of the aggregate, a slurry mixture readily …
An Investigation Of Core-Strengths Of A Portland Cement Concrete Pavement, James H. Havens
An Investigation Of Core-Strengths Of A Portland Cement Concrete Pavement, James H. Havens
Kentucky Transportation Center Research Report
This investigation concerns observed differences between the strengths of molded cylinder and beam specimens and the strength of concrete in situ. The specific project is a section of I 64 in Rowan County [I 64-6(15)130]. The paving was done between August 19 and September 27, 1968. Cylinder specimens molded on the project were tested after they had cured 28 days. Beam specimens were tested before they had cured 14 days. Those test results were "normal". However, cores taken to measure thickness of the pavement were subsequently tested for strength; and the pavement cores, even though older when tested, yielded strengths …
Equal Employment Opportunity, B. B. Meyers
Equal Employment Opportunity, B. B. Meyers
Kentucky's Annual Forum on Transportation
No abstract provided.
Traffic Operations During Maintenance, William G. Galloway
Traffic Operations During Maintenance, William G. Galloway
Kentucky's Annual Forum on Transportation
No abstract provided.
Public Hearings - Closing The Communications Gap, James G. Apple
Public Hearings - Closing The Communications Gap, James G. Apple
Kentucky's Annual Forum on Transportation
No abstract provided.
Relocation Assistance, Carl H. Bradley
Relocation Assistance, Carl H. Bradley
Kentucky's Annual Forum on Transportation
No abstract provided.
References [1969], Kentucky Transportation Center
References [1969], Kentucky Transportation Center
Kentucky's Annual Forum on Transportation
No abstract provided.
Lane Distribution, G. R. Garner
Lane Distribution, G. R. Garner
Kentucky's Annual Forum on Transportation
No abstract provided.
Effects Of Auto-Utility Trailers, B. S. Siria
Effects Of Auto-Utility Trailers, B. S. Siria
Kentucky's Annual Forum on Transportation
No abstract provided.
Evaluation Of The Function Of Models In Interchange Design, C. F. Davis, J. A. Dearinger
Evaluation Of The Function Of Models In Interchange Design, C. F. Davis, J. A. Dearinger
Kentucky's Annual Forum on Transportation
No abstract provided.
Median Design And Accident History, G. R. Garner
Median Design And Accident History, G. R. Garner
Kentucky's Annual Forum on Transportation
No abstract provided.
Impact Attenuating And Redirectionalizing Safety Barriers, Gordon R. Garner, Bruce S. Siria
Impact Attenuating And Redirectionalizing Safety Barriers, Gordon R. Garner, Bruce S. Siria
Kentucky's Annual Forum on Transportation
No abstract provided.
Accidents At Median Crossovers, G. R. Garner
Accidents At Median Crossovers, G. R. Garner
Kentucky's Annual Forum on Transportation
No abstract provided.
An Evaluation Of The Effectiveness Of Televised, Locally Oriented Driver Re-Education, J. W. Hutchinson
An Evaluation Of The Effectiveness Of Televised, Locally Oriented Driver Re-Education, J. W. Hutchinson
Kentucky's Annual Forum on Transportation
No abstract provided.
Grooving Of Pavements, G. R. Garner
Grooving Of Pavements, G. R. Garner
Kentucky's Annual Forum on Transportation
No abstract provided.
Pavement Marking Systems, J. H. Havens
Pavement Marking Systems, J. H. Havens
Kentucky's Annual Forum on Transportation
No abstract provided.
Structural Paints, J. H. Havens
Structural Paints, J. H. Havens
Kentucky's Annual Forum on Transportation
No abstract provided.
Blow-Ups And Cracking Of Pcc Pavements, J. H. Havens
Blow-Ups And Cracking Of Pcc Pavements, J. H. Havens
Kentucky's Annual Forum on Transportation
No abstract provided.
Road Roughness, R. L. Rizenbergs
Road Roughness, R. L. Rizenbergs
Kentucky's Annual Forum on Transportation
No abstract provided.
Stability Of A Guided Air Cushion Vehicle, Don J. Wood
Stability Of A Guided Air Cushion Vehicle, Don J. Wood
Kentucky's Annual Forum on Transportation
No abstract provided.
Pavement Surface Hydrodynamic Drainage, J. W. Hutchinson
Pavement Surface Hydrodynamic Drainage, J. W. Hutchinson
Kentucky's Annual Forum on Transportation
No abstract provided.
Skid Resistance, R. L. Rizenbergs
Skid Resistance, R. L. Rizenbergs
Kentucky's Annual Forum on Transportation
No abstract provided.
Freeze And Thaw Phenomena Of Concrete Aggregate, J. H. Havens
Freeze And Thaw Phenomena Of Concrete Aggregate, J. H. Havens
Kentucky's Annual Forum on Transportation
No abstract provided.
Slurry Seal Maintenance Applications, H. F. Southgate
Slurry Seal Maintenance Applications, H. F. Southgate
Kentucky's Annual Forum on Transportation
No abstract provided.
Stress Distribution In Rectangular Concrete Slabs Under Wheel Loads, Y. H. Huang
Stress Distribution In Rectangular Concrete Slabs Under Wheel Loads, Y. H. Huang
Kentucky's Annual Forum on Transportation
No abstract provided.
Submerged Cross-Jet Control Of Hydraulic Jump, T. Y. Kao
Submerged Cross-Jet Control Of Hydraulic Jump, T. Y. Kao
Kentucky's Annual Forum on Transportation
No abstract provided.