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Articles 5581 - 5610 of 5920

Full-Text Articles in Civil and Environmental Engineering

Portland Cement Stabilization Of Western Kentucky Gravels, Robert C. Deen Nov 1961

Portland Cement Stabilization Of Western Kentucky Gravels, Robert C. Deen

Kentucky Transportation Center Research Report

It has been known for some time that some Western Kentucky bank gravels perform rather poorly as base or shoulder material. In the fall of 1956, the Division of Research participated in the experimental design and evaluation of a group of ten rural highway base stabilization projects. Two of these projects, one in Ballard County and one in Marshall County involved the stabilization of Western Kentucky bank gravels with a bituminous material; AE-200, a mixing-type emulsion, was used.

The performance of these bitumirlous-stabilized gravels has not been entirely satisfactory. Even though little tendency was noted for the asphalt to bleed …


Proposal For Experimental Use Of Thermo-Plastic Pavement-Striping Materials, James H. Havens Nov 1961

Proposal For Experimental Use Of Thermo-Plastic Pavement-Striping Materials, James H. Havens

Kentucky Transportation Center Research Report

No abstract provided.


Performance Of A Reinforced Concrete Pipe Culvert With Standard And B1 High Fill Bedding Under Rock Embankment, Ralph R. Taylor Aug 1961

Performance Of A Reinforced Concrete Pipe Culvert With Standard And B1 High Fill Bedding Under Rock Embankment, Ralph R. Taylor

Kentucky Transportation Center Research Report

In co-operation with the Bureau of Public Roads, a number of reinforced pipe culvert installations in a number of states have been selected to evaluate the effectiveness of the design and construction criteria. One particular pipe has been chosen for this special study because of its installation conditions. This pipe is located on I 75-6 (5) 123 in Scott County at Station 37 + 50, US460, SW Ramp, and has been constructed using both type beddings that are specified in the 1956 edition of the Kentucky Department of Highways Standard Specifications for Road and Bridge Construction and amendments thereto. Observation …


Pavement Surveys, Milton Evans Jr. Jul 1961

Pavement Surveys, Milton Evans Jr.

Kentucky Transportation Center Research Report

The major considerations in the evaluation of a slab's condition, where surface defects exist, are the number of defects, their type and size. It is possible for a slab to contain a large number of surface intrusions without being appreciably damaged, if the impairments are all very small. On the other hand, only a few very large defects would be very damaging. Certainly, the most satisfactory condition would be the complete absence of blemishes.

In the surveys which have been made since the beginning of these pavement investigations, soil holes, chert pop-outs, shale pitting, trash imbedments and cracks have comprised …


Investigation Of Concrete Pavement Us-60 Between Versailles And Frankfort, Milton Evans Jr. May 1961

Investigation Of Concrete Pavement Us-60 Between Versailles And Frankfort, Milton Evans Jr.

Kentucky Transportation Center Research Report

A complete survey of the above project was made between April 27, and May 13, of this year to deter mine the condition of the pavement after the second winter of service. The data from this survey include all of the approximately ten miles of four-lane highway, Tables I and II; all of the cross-overs, Table III; and the ramps and connecting lanes in the interchanges, Tables IV and V. Table VI covers the areas where several surveys have been conducted and Table VII is a breakdown of the total defects by type for the whole project. These tables are …


Proposed Special Specifications For Lightweight Concrete, James H. Havens Apr 1961

Proposed Special Specifications For Lightweight Concrete, James H. Havens

Kentucky Transportation Center Research Report

No abstract provided.


"The Engineer's Obligation To The Public", W. P. Curlin Mar 1961

"The Engineer's Obligation To The Public", W. P. Curlin

Kentucky's Annual Forum on Transportation

No abstract provided.


Economic Impact Of Highway Construction And Right Of Way Purchasing, Carl H. Bradley Mar 1961

Economic Impact Of Highway Construction And Right Of Way Purchasing, Carl H. Bradley

Kentucky's Annual Forum on Transportation

No abstract provided.


Local Policy On Urban Highway Planning, Robert D. Bugher Mar 1961

Local Policy On Urban Highway Planning, Robert D. Bugher

Kentucky's Annual Forum on Transportation

No abstract provided.


"Federal Policy On Urban Highway Planning", Fred B. Farrell Mar 1961

"Federal Policy On Urban Highway Planning", Fred B. Farrell

Kentucky's Annual Forum on Transportation

No abstract provided.


"Observations Of A Visiting Highway Engineer", J. Alan Proudlove Mar 1961

"Observations Of A Visiting Highway Engineer", J. Alan Proudlove

Kentucky's Annual Forum on Transportation

No abstract provided.


County Planning; An Important Factor In Rural Resources And Development, A. J. Gray Mar 1961

County Planning; An Important Factor In Rural Resources And Development, A. J. Gray

Kentucky's Annual Forum on Transportation

No abstract provided.


Substructure, J. H. Word Mar 1961

Substructure, J. H. Word

Kentucky's Annual Forum on Transportation

No abstract provided.


"Welded Shop Fabricated New Clays Ferry Bridge", C. G. Cook Mar 1961

"Welded Shop Fabricated New Clays Ferry Bridge", C. G. Cook

Kentucky's Annual Forum on Transportation

No abstract provided.


High Strength Reinforcing Steel For Bridges, R. S. Fountain Mar 1961

High Strength Reinforcing Steel For Bridges, R. S. Fountain

Kentucky's Annual Forum on Transportation

No abstract provided.


Experimental Pavements With Curtiss-Wright's Coal-Modified, Coal-Tar Binder (First Year's Performance), James F. Hardyman Mar 1961

Experimental Pavements With Curtiss-Wright's Coal-Modified, Coal-Tar Binder (First Year's Performance), James F. Hardyman

Kentucky's Annual Forum on Transportation

No abstract provided.


"Kentucky Interchanges, Past, Present And Future", Marx A. Anderson Mar 1961

"Kentucky Interchanges, Past, Present And Future", Marx A. Anderson

Kentucky's Annual Forum on Transportation

No abstract provided.


The Roadside Chemical Control Program In Ohio, James R. Riddle Mar 1961

The Roadside Chemical Control Program In Ohio, James R. Riddle

Kentucky's Annual Forum on Transportation

No abstract provided.


New Developments In Concrete Pavement Construction, Gordon K. Ray Mar 1961

New Developments In Concrete Pavement Construction, Gordon K. Ray

Kentucky's Annual Forum on Transportation

No abstract provided.


"Planning Aspects Of The Highway Program", J. R. Harbison Mar 1961

"Planning Aspects Of The Highway Program", J. R. Harbison

Kentucky's Annual Forum on Transportation

No abstract provided.


"Compaction Of Flexible Pavements", Charles R. Foster Mar 1961

"Compaction Of Flexible Pavements", Charles R. Foster

Kentucky's Annual Forum on Transportation

No abstract provided.


Federal-Aid Highway Financing, Henry Ward Mar 1961

Federal-Aid Highway Financing, Henry Ward

Kentucky's Annual Forum on Transportation

No abstract provided.


Kentucky Highway Conference Program [1961], Kentucky Transportation Center Mar 1961

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 Mar 1961

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 Mar 1961

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 Mar 1961

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 Mar 1961

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 Mar 1961

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 Mar 1961

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 Feb 1961

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 …