Engineering Commons^™

Rheological And Ultimate Strength Properties Of Cohesive Soils, Gordon D. Scott

Kentucky Transportation Center Research Report

In recent years, there have been considerable advances made in rheological theory and its application to various materials. There has not been, however, nearly as much work done toward applying rheology to soil mechanics as the successes of others would seem to indicate. For instance, it has been shown that a variety of stress and deflection problems considering the application of a load by means of an elastic plate to an elastic foundation can be extended to include rate effects through the application of linear viscoelastic theory. Before this theory can be applied to foundation design, however, two questions must …

Settlement Of Highway Bridge Approaches And Embankment Foundations, Tommy C. Hopkins

Kentucky Transportation Center Research Report

The nature and causes of the differential settlement between a bridge deck and the adjoining highway pavement have been studied by only a few investigators. Highway engineers often attribute this fault in the riding surface to the settlement of the embankment because of the improper placement and compaction of material in the approach embankment. Although there exists suggestive evidence that this condition produces the bridge approach fault, no conclusive evidence has been presented which shows this to be the primary source of settlement. Jones (1), Bishop (2) and Deen (3) suggest that differential settlement between the bridge deck and approach …

Flexible Pavement Design Criterion, James H. Havens

Kentucky Transportation Center Research Report

Our recent report on "Rational Analysis of Kentucky Flexible Pavement Criterion," November 1968, presented theoretical treatments of current design curves – which enabled transformation of the current curves into companion sets of curves embodying alternative proportions of bituminous concrete and dense-graded aggregate base. We are privileged now to submit additional analytical information and to offer recommendations for revising the present design criterion.

Developments In Concrete Pavement Construction, Dan C. Woodward

Kentucky's Annual Forum on Transportation

No abstract provided.

The National Bridge Inspection Program, W. Jack Wilkes

Kentucky's Annual Forum on Transportation

No abstract provided.

State Bridge Program, T. J. Hopgood

Kentucky's Annual Forum on Transportation

No abstract provided.

Bridge Modernization Program - Logan County, Henry A. Padgett Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

Hot Mix Sand Surface, James H. Havens

Kentucky's Annual Forum on Transportation

No abstract provided.

The Relationship Between The Development Of Highways And Water Resources Management, G. F. Hughes Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

Impact Of Highway Construction On Water Resource Management, Joe Tucker

Kentucky's Annual Forum on Transportation

No abstract provided.

Joint Development And Design Team Concept, F. L. Anthony

Kentucky's Annual Forum on Transportation

No abstract provided.

The Architecture Of Bridges, Arnold H. Vollmer

Kentucky's Annual Forum on Transportation

No abstract provided.

New Developments In Joint Sealing Practice For Longer Spans, Stewart C. Watson

Kentucky's Annual Forum on Transportation

No abstract provided.

Manual Of Uniform Traffic Control Devices And Problems In Traffic Control Agreements, Grover C. Ethington Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

State Road Systems And Maintenance Responsibility, John W. Spurrier

Kentucky's Annual Forum on Transportation

No abstract provided.

Rural Secondary And County Road Aid Programs, John D. Witt

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky Highway Program, W. B. Hazelrigg

Kentucky's Annual Forum on Transportation

No abstract provided.

Federal-Aid Highway Program After Interstate, Robert S. Holmes

Kentucky's Annual Forum on Transportation

No abstract provided.

New Provisions Of The Federal Aid Highway Act Of 1968, John A. Swanson

Kentucky's Annual Forum on Transportation

No abstract provided.

Twentieth Kentucky Highway Conference Committee, Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.

Hot Mix Sand Surfacing, James H. Havens

Kentucky Transportation Center Research Report

Everyone has some compassion toward drivers who become victims of pavement slipperiness. The development of slipperiness on a road surface follows one of the laws of nature. Why not, then, employ other laws provided by nature to better advantage? For example, craftsmen use grinders, abrasives, buffers, etc. to achieve glossy surface finishes. Traffic does the same to our pavements. We might employ craftsmens' routine in reverse -- that is, roughen the surface. Better still, the principles that are apparent in a grinding wheel or whetstone may be used as a model for our pavement surface: a material of hard, abrasive …

Rational Analysis Of Kentucky Flexible Pavement Design Criterion, Herbert F. Southgate, Robert C. Deen, James H. Havens

Kentucky Transportation Center Research Report

Rational criteria for the structural design of pavements are emerging from classical theories equated to the observed behavior of real pavements. Pavement behavior is known to be affected by traffic, variations in soil support, and variations of component thicknesses. Considerable attention has been devoted to the mechanistic response of pavements to static and dynamic loads and to the development of theoretical design procedures, which rely, in part, on the computation of certain critical stresses, strains, and(or) deflections in the structure. A computer program (1) for the elastic analysis of multilayered pavement systems has enabled an extensive investigation of the effects …

Proposed Experimental Design And Construction Features, Kentucky Department Of Highways

Kentucky Transportation Center Research Report

PURPOSE AND OBJECTIVES: The experimental features proposed in connection with this project are three-fold: the first pertains to subsurface drainage of the pavement system, the second pertains to the feasibility of constructing full-depth, asphaltic concrete pavement sections directly on subgrade material -- rock or soil; the third pertains to the structural design and performance of pavement sections employing designated substitutions of bituminous concrete dense-graded aggregate base.

Landslides In Kentucky, Robert C. Deen, James H. Havens

Kentucky Transportation Center Research Report

The reoccurrence of certain features of landslides in Kentucky suggests that the difficulties in the State can be readily classified. Because of this repetitive nature, one can be alerted to the possibility of slides in certain situations early in the planning and design stages of the facility to be constructed. Thus, the traveling public might be spared the inconvenience illustrated in Figure 1. Enough cannot be said concerning the necessity for having adequate soils and geological information concerning possible routes for highway locations, and a review of a number of landslides in Kentucky suggests that there are certain troublesome geologic …

Discussion On Skid Resistance Of Pavement Surfaces, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

The concern for adequate skid resistance or friction of pavement surfaces is confined to wet weather conditions. Dry pavements are highly skid resistant unless the surface contains loose material, such as gravel, sand, etc., which could provide rolling action by the particles under the tires. Surface contaminates, such as oil, soft tars and asphalt, etc., could also provide lubrication to the surface and create a slippery condition. Normally, however, water is the lubricating agent reducing pavement friction and in some cases creating very hazardous driving conditions. Another situation of concern is drainage, or lack of proper drainage, of the pavement. …

I-75 Kenton County Slide, Herbert F. Southgate

Kentucky Transportation Center Research Report

No abstract provided.

Determination Of Traffic Parameters For The Prediction, Projection, And Computation Of Ewl’S, John A. Deacon, Robert L. Lynch

Kentucky Transportation Center Research Report

One of the first published methods for the structural design of highway pavements was called the Massachusetts Rule and was presented in the eighth annual report of the Massachusetts Highway Commission in 1901 (1). The essence of this procedure was a rather intuitive assumption concerning the distribution of vertical pressures beneath a loaded area. For design purposes, this required the selection of a design load which, since failure was assumed to be catastrophic and not cumulative, could be taken as the largest load that could reasonably be anticipated during the design life of the pavement. The prediction of such a …

Equivalent Axleloads For Pavement Design, John A. Deacon, Robert C. Deen

Kentucky Transportation Center Research Report

Proper structural design of highway pavements requires an evaluation of the destructive effects of the anticipated vehicular loading. The concept of load equivalency provides a means for expressing these destructive effects in terms of a single measure, the equivalent axleloads (EAL's). The design EAL's represents the equivalent number of applications of a standard or base axleload anticipated during the design life.

Florida Skid Correlation Study Of 1967 – Skid Testing With Automobiles, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

The inclusion of automobiles in the Florida skid correlation study was promoted by the recognition of the following needs: 1) to compare stopping-distance measurements obtained with different instrumentation, 2) to suggest a standard method of stopping-distance testing, 3) to relate skid-resistance measurements of trailer-type testers with stopping distances of automobiles, and 4) to explore other skid-resistance measurements techniques using an automobile.

The vehicles were all full-size automobiles. Each vehicle was instrumented to measure a distance from a predetermined pressure in the brake hydraulic system to where the vehicle came to rest. Stopping distance in most of the automobiles was read …

Kentucky Rock Asphalt Hot-Mix Surfaces, Robert L. Florence

Kentucky Transportation Center Research Report

When this study was initiated in 1962, the objectives were disposed toward the development of Kentucky Rock Asphalt for use as a traffic-bound base and surface on rural roads near its source and toward redevelopment of the material for use as hot-mixed, hot-laid, skid-resistant surface course for higher echelon roads. Between July 1962 and August 1965, eight experimental, lean rock-asphalt bases were constructed and evaluated (1, 2, 3).

During the fall of 1965 a hot-mixed, enriched, rock-asphalt surfacing material was successfully produced through a conventional hot-mix plant and laid with a paver on a 8.4-mile section of Nolin Dam Road …