Engineering Commons^™

Maintenance Of Calcium Chloride Treated Surfaces And Shoulders, W. S. G. Britton

Kentucky's Annual Forum on Transportation

No abstract provided.

The Properties Of Aggregate For Dense Graded Base Course Construction, J. E. Gray

Kentucky's Annual Forum on Transportation

No abstract provided.

Proper Procedures For Acquiring Right Of Way, C. W. Phillips

Kentucky's Annual Forum on Transportation

No abstract provided.

A Peep At The Turnpike, J. J. Pollitte

Kentucky's Annual Forum on Transportation

No abstract provided.

Urban Transportation Planning, Garland E. Marple

Kentucky's Annual Forum on Transportation

No abstract provided.

Address [1962], Henry Ward

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky Highway Conference Program [1962], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.

Pavement Roughness Studies, James H. Havens

Kentucky Transportation Center Research Report

During 1961, the equivalent of about 800 lane-miles of pavement were tested and analyzed. The largest portion of this mileage was on completed Interstate projects. In November, three pavements selected by the Bureau of Public Roads for serviceability-index ratings (6) were tested; and these are discussed briefly in this report.

Periodic surveillance of the roughness of all of the roads presently listed in Tables 1 and 2 is contemplated. New primary and Interstate construction will be included in the future. Thus, each respective project may be eventually characterized by a history of roughness measurements.

An Evaluation Of Four Retarding Admixtures In Structural Concrete, Milton Evans Jr., Ralph R. Waddle

Kentucky Transportation Center Research Report

Early in 1960, the Construction Division was becoming quite concerned with the growing problem of obtaining satisfactorily smooth reinforced concrete bridge decks. Increasing areas of new decks were not measuring up to requirements when checked with a straight-edge, and rough-riding surfaces were resulting even after corrective grinding. It appeared that, on large pours, perhaps more time for placing and finishing was needed; this was so particularly on hot, windy days when ambient conditions would cause the concrete to set more rapidly. A proposed method of providing more working time was to use retarding admixtures to slow the setting time of …

Base Stabilization Bryantsville-Beuna Vista Road, Garrard County, Robert C. Deen

Kentucky Transportation Center Research Report

Construction plans for the summer of 1961 called for the placement of a bituminous surface (Class C-1) on Ky. 753 in Garrard County (see Fig. 1). The project extends from US 27 in Bryantsville to Ky. 152 at Beuna Vista, a distance of approximately 2.8 mites. To prepare the roadbed for this bituminous surfacing, personnel of the Maintenance Division placed additional stone on the roadway and stabilized it with calcium chloride. The Research Division was requested to make recommendations as to application rates of the available stone and calcium chloride and to follow the general performance of the project.

Pavement Slipperiness Studies (A Progress Report), James H. Havens, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

Traction or frictional resistance of tires on clean, dry pavements tends to be fairly high (coefficient of friction of 0.6 to 0.8) and to be independent of the texture of the pavement surface. In contrast, the loss of traction on a wet pavement is due entirely to lubrication effects; and, while wet friction seems to be fairly independent of the identity of the aggregate, it is extremely dependent upon the texture and porosity of the surface. Likewise, the mineralogical and lithological characteristics of the aggregates largely determine the natural texture, i.e., type of wear (coarse or fine) which the aggregate …

Cutback Asphalt Emulsion Primer, Type L, Nelson County, Project Rs Group 38 (1961), J. D. Shackelford

Kentucky Transportation Center Research Report

Personnel of the Research Division visited the Nelson County project to observe the application and behavior of the cutback asphalt emulsion primer, Type L, on Ky. 733, northeast of Boston. The following remarks concerning this project are submitted for your information.

Second Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes

Kentucky Transportation Center Research Report

A criteria for the design and installation of reinforced concrete pipe culverts was developed by the Bureau of Public Roads in cooperation with the American Concrete Pipe Association and distributed to the various highway agencies in April, 1957, under Circular Memorandum 22-40. This criteria was developed in order to bring together and simplify methods for computing necessary pipe strengths for use under various heights of fill and provide for more effective utilization of reinforced concrete pipe for use as culverts. The memorandum also described various methods for bedding reinforced concrete pipe and outlined procedures for installation of the pipe under …

Evaluation Of Calcium-Chloride Maintained, Traffic-Bound Roads, George R. Laughlin

Kentucky Transportation Center Research Report

Calcium chloride has been used on unpaved road surfaces for over fifty years. Originally, it was used as a dust palliative and later as a stabilizing agent. Observations have shown that traffic-bound roads containing well-graded aggregate and sufficient binder tend to have smooth, stable surfaces. While the binder remains in a damp, cohesive state, the road surface remains in a smooth, compact condition. If the surface becomes dry, dusting and attrition becomes pronounced. Therefore, for a properly constructed traffic-bound base to remain in smooth, stable condition, it is essential that the surface remain damp. Calcium chloride, being a hygroscopic and …

Class I, Type B, Plant-Mix Initial Treatment, Pac-9, Robert L. Florence

Kentucky Transportation Center Research Report

Initial surface treatments of so-called traffic-bound macadam rural secondary roads presents a challenging but frustrating problem in the over-all highway program. In many cases, these roads do not merit the expenditures that would be needed to construct the type of pavement desired, yet there is a need for a dust-free, all-weather type of surface for these roads. It may be argued, for instance, that initial surfacing should be deferred until such time that the construction of a proper base and surface would be justified. On the other hand, one might argue that even a light surfacing would be preferred despite …

Dynamics Of Sprung Loads On Pavements, James H. Havens, D. F. Hutcheson

Kentucky Transportation Center Research Report

The attached report, "Dynamics of Sprung Loads on Pavements," resulted from a need for reliable impact factors for use in the structural design of pavements. For some years, it has been customary to use 1.2 times the static wheel load for designing portland cement concrete pavements. We, along with other investigators, have questioned this value, and have actually used higher values for some specific conditions. Impact factors for specific situations are listed on page 33 of the report. The three roads classed as smooth averaged 1.25, while the rough road gave a value of 1.35. Depressions at culverts and bridge …

A Modified Class I Surface Mixture, Robert L. Florence

Kentucky Transportation Center Research Report

Since the summer of 1954, it has been the practice of the Department to require only natural. sand or slag as the fine aggregate in high-type (Class I, Type B) bituminous surface mixtures. This, of course, was done in order to build skid resistance into the mixture, i.e. by use of polish-resistant fine aggregate. At first, this was specified by means of plan notes; and, during 1957, an Amendment was made to the Standard Specifications. While this has apparently reduced the slickness problem it has created problems relating to the durability and, at times, the stability of the surface course.

Seal Coat Application To Clark Memorial Bridge, Robert C. Deen

Kentucky Transportation Center Research Report

The maintenance of the surface of the approach ramps and bridge deck of the Clark Memorial Bridge in Louisville has presented certain problems over the past few years. The ramps at each end of the bridge are rather steep, and on the Louisville side the ramp intersects Main Street where traffic movements are controlled by traffic signals. Thus, the northbound traffic accelerating upgrade from a stop and the southbound traffic braking to a stop on the downgrade present two very severe conditions that the surface must withstand. The increased use of salt for snow and ice removal has also contributed …

Experimental Paving Projects Using Curtiss-Wright’S Coal-Modified, Coal-Tar Binder [1962], William B. Drake

Kentucky Transportation Center Research Report

This report covers the observation and evaluation of 13 sections of experimental pavement constructed in Kentucky using coal-modified coal-tar binder. These are compared with the performance of control sections in which normal specification asphalt cements were used. The results of laboratory and field tests are also reported to support and supplement the visual surveys.

A Machine-Laid Surmountable Bituminous Concrete Median, Robert L. Florence

Kentucky Transportation Center Research Report

On August 28, 1961, personnel of the Research Division were requested to observe a demonstration of a newly developed Etnyre Median Paver. The demonstration was given at the Lehman-Roberts Company plant in Lexington, and was arranged primarily for the benefit of the paving contractor working on Euclid Avenue in Lexington. The paving contract called for the construction of a surmountable bituminous concrete median which, to our understanding, is the first instance for construction of that type to be machine-laid. Some doubts arose during the demonstration as to the ability of the machine to hold alignment and to give adequate compaction. …

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

Kentucky Transportation Center Research Report

No abstract provided.

Concrete Color Variations Observed In Specimens Made From 12 Type 1 Portland Cements, Milton Evans Jr.

Kentucky Transportation Center Research Report

No abstract provided.

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 …

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.

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.

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

Kentucky Transportation Center Research Report

No abstract provided.

"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

Kentucky's Annual Forum on Transportation

No abstract provided.

Local Policy On Urban Highway Planning, Robert D. Bugher

Kentucky's Annual Forum on Transportation

No abstract provided.