Engineering Commons^™

"Compaction Of Flexible Pavements", Charles R. Foster

Kentucky's Annual Forum on Transportation

No abstract provided.

Federal-Aid Highway Financing, Henry Ward

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky Highway Conference Program [1961], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.

Performance Report On Bridge Resurfacings With Silica Sand-Asphalt Mixture, Robert L. Florence

Kentucky Transportation Center Research Report

When the Maintenance Division found it necessary to resurface the Clark Memorial and Ashland-Coal Grove Bridges in 1958, a thin, silica sand-asphalt, wearing surface was recommended by the Research Division. The basis of the recommendations was the promising results obtained in laboratory testing and the apparently successful resurfacing of bridges with thin applications of silica sand-asphalt in the New York Area and elsewhere. The design and construction details pertaining to these two projects have been reported previously. This report is a record of the performance of the two projects and of the repair of spalled areas on the deck of …

Analysis Of Pavement Roughness, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

In earlier progress reports dealing with the development of triaxial acceleration analysis as applied to the evaluation of pavement riding qualities, of which this report is a continuation, riding comfort or discomfort was emphasized. The accelerations monitored then were evaluated in terms of g's per sec., or "jerk" which is considered by some authorities to be a more significant index of comfort. The earlier methods of analysis have been reviewed, and acceleration is considered here to be the most practical parameter to use as a measure of pavement roughness. Most of the equipment and instrumentation has been retained, and the …

Proposed Special Specification For Sand Asphalt, Skid-Resistant, Wearing Course, James H. Havens

Kentucky Transportation Center Research Report

Because of the prominence that natural, sandstone, rock asphalt enjoyed in Kentucky during the past 50 years, sand-asphalts and sheet-asphalt mixes have not been used very extensively for paving in Kentucky. This is somewhat unfortunate because the natural, sand stone, rock asphalt has not been available since about 1955 and because there is now a need for a fine-textured, skid-resistance, wearing course for resurfacing work as well as on new pavements. These circumstances, coupled with the realization (1953-54) that surface courses and chip seals using 100% limestone aggregates tend to become slick, have emphasized the need for specifications for sand-asphalts. …

A Method For The Design Of Foundations Supporting Highway Signs, Robert C. Deen

Kentucky Transportation Center Research Report

With the increased mileage of highways being built to high standards, the resulting high-speed travel requires that more and larger signs be installed to relay to the motoring public information they require. It would be desirable to have a method of design which will result in a foundation involving rather simple construction procedures. It was decided that a cylindrical, non-reinforced concrete foundation with an uniform diameter would be the most advantageous for construction purposes. It should be realized, however, tha(the most efficient shape theoretically is one that has increased diameters at the top and the bottom.

The resistance of a …

Experimental Paving Projects Using Curtiss-Wright’S Coal-Modified, Coal-Tar Binder (First Year Performance), James F. Hardymon

Kentucky Transportation Center Research Report

This report has been prepared as a sequence to the author's publication entitled, "Experimental Paving Projects using Curtiss-Wright's Coal-Modified, Coal-Tar Binder (Construction Phase)."

The previous study was concerned with the selection of test sites, the construction of the test and control sections, and the laboratory investigation performed before and d uring the construction period. This project started in April, 1959, when the Curtiss-Wright Corporation announced the development of a new and superior road-paving binder utilizing bituminous coal. The development was the result of their research program conducted in an effort to find new uses for coal and coal products.

Performance Survey Of Reinforced Concrete Pipe Culverts, Robert C. Deen, Ronald D. Hughes

Kentucky Transportation Center Research Report

Methods of installation and design criteria have tended to restrict the usefulness of rigid pipe culverts. With the increased mileage of highways which meet high standards, there has been an increase in the number of pipe culverts installed under high fills. This, of course, has accented the need for criteria for the proper design and installation of rigid pipe to obtain the maximum utilization of the pipe strength and to minimize the possible steelements that may occur in the road surface near the pipe installation or in the flow line of the pipe culvert.

In order to provide for an …

Performance Report On Application Of Wire Mesh Reinforcement To Asphaltic Concrete Pavement Overlays, Robert C. Deen, Robert L. Florence

Kentucky Transportation Center Research Report

During the past two decades an increasing mileage of portland cement concrete pavements has been resurfaced with bituminous concrete. This has generally proven to be a satisfactory and economical method of restoring, improving and enhancing the traffic service life of the highways. After a short period, however, cracks often begin to appear over the joints and cracks of the underlying concrete pavement. This condition is commonly referred to as "reflection cracking".

The presence of these reflection cracks are undesirable for a number of reasons. The open crack that develops may permit water to penetrate, often causing rave ling of the …

Evaluation Of A Vibratory Roller For Use In Compacting Bituminous Concrete Mixes, Robert C. Deen

Kentucky Transportation Center Research Report

According to Article 4.3.5-D-1 of the 1956 Edition of Kentucky's Standard Specifications for Road and Bridge Construction, a minimum of two rollers, one 3-wheeled roller and one tandem roller, shall be required on each state project involving bituminous concrete paving operations. A further requirement of the specifications is that additional rollers will be provided so that there is avaHable "...at least one roller for each 30 tons of the bituminous mixture per hour..." that is laid. This, of course, means that for paving operations involving the laying of the bituminous mixture at rapid rates, the contractor must have available and …

Discussion Of The Kentucky Criteria For Design Of Flexible Pavement Thicknesses, Kentucky Highway Materials Research Laboratory

Kentucky Transportation Center Research Report

The Kentucky Department of Highways, in 1946, sought a more systematic criteria and basis for designing the thickness of bituminous concrete pavements. The Research Division was authorized to pursue this work and to develop the criterion. These efforts were embodied in a report (1) to the Department, which offered a system of design based upon CBR's and EWL's. EWL's were computed originally for a 10-year period but this practice was revised in 1954 to encompass 20-year traffic (more realistic with respect to average road life). Then, in 1957, the Department requested a re-evaluation of the criteria from the standpoint of …

A Discussion On The Durability Of Expanded Shale Aggregate For Exposed Concrete Structures (Bridges), James H. Havens

Kentucky Transportation Center Research Report

During the period between 1924 and 1934, in particular, numerous reinforced concrete bridges were built in Kentucky and elsewhere. Although many of them are still in service, they are some 30 years old and are showing the effects of time and weather. While it is true, of course, that they were constructed without the benefit of air-entrainment and without many present-day control practices, the influences of aggregate quality and freeze-thaw are usually apparent. The advent of the de-icing salt era, about 1940 and following World War II, introduced an additional deteriorating influence gnawing at old and new structures alike. The …

Criteria For Design Of Pavement Thicknesses, Kentucky Interstate Highways, William B. Drake, James H. Havens

Kentucky Transportation Center Research Report

The Kentucky Department of Highways, in 1946, sought a more systematic criteria and basis for designing the thickness of bituminous concrete pavements. The Research Division was authorized to pursue this work and to develop the criterion. These efforts were embodied in a report (1) to the Department, which offered a system of design based upon CBR's and EWL's. EWL's were computed originally for a 10-yr. period but this practice was revised in 1954, to encompass 20-yr. traffic (more realistic with respect to average road life). Then, in 1957, the Department requested a re-evaluation of the criteria from the standpoint of …

Experimental Paving Projects Using Curtiss-Wright’S Coal-Modified, Coal-Tar Binder [1960], James F. Hardyman

Kentucky Transportation Center Research Report

On April 7, 1959, the Curtiss-Wright Corporation announced the development of a new coal-based road paving binder, utilizing bituminous coal. This development was the result of their research program conducted in an effort to find new uses for coal and coal products. The basic principle used in preparing this bituminous binder was the digestion of powdered coal in coal tar and tar oils at temperatures of 500-600°F. By adjusting the proportions of tar, tar oils, and coal, binders could be prepared having penetration ranges comparable to asphalt cements. It was the intent of the developers that the modified binders be …

Precast-Prestressed Concrete I-Beam Bridges, Paul H. Kaar, Alan H. Mattock

Kentucky's Annual Forum on Transportation

No abstract provided.

Highway Impact Research: Origins, Aims, Directions, Robert H. Stroup, Eugene C. Holshouser, Louis Varga

Kentucky's Annual Forum on Transportation

No abstract provided.

"Kentucky's Bituminous Pavement Research On Modified Coal Tar", W. B. Drake

Kentucky's Annual Forum on Transportation

No abstract provided.

"Asphalt Mix Designs", John M. Griffith, B. F. Kallos

Kentucky's Annual Forum on Transportation

No abstract provided.

"Signals And Lighting", Grover C. Ethington

Kentucky's Annual Forum on Transportation

No abstract provided.

"Channelization", W. G. Galloway

Kentucky's Annual Forum on Transportation

No abstract provided.

"Traffic Patterns", K. B. Johns

Kentucky's Annual Forum on Transportation

No abstract provided.

"Findings And Recommendations Of The Sagamore Conference On Urban Highway Development", Alan M. Voorhees

Kentucky's Annual Forum on Transportation

No abstract provided.

"Design And Construction Coordinated With Electronic Computation", W. B. Carrington

Kentucky's Annual Forum on Transportation

No abstract provided.

"Construction Practices For Bridge Decks", Austin Griffith

Kentucky's Annual Forum on Transportation

No abstract provided.

"Maintenance Policy And Practices Of The Bureau Of Public Roads", Harold G. Tipton

Kentucky's Annual Forum on Transportation

No abstract provided.

"Problems In Highway Bridge Design, Fabrication And Erection", E. L. Durkee

Kentucky's Annual Forum on Transportation

No abstract provided.

"Methods For Selecting Roads For The Rural Secondary Program", L. A. Whitmer

Kentucky's Annual Forum on Transportation

No abstract provided.

"The Relation Of Rural Highways And Rural Secondary Highways To The County Road Program", James T. Sabel

Kentucky's Annual Forum on Transportation

No abstract provided.

Address [1960], Bert T. Combs

Kentucky's Annual Forum on Transportation

No abstract provided.