Civil and Environmental Engineering Commons^™

Suggested Changes To Kentucky Statutes (Vehicle Weights And Dimensions), Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

The purposes of this report are: 1. To clearly define the terms ''tandem," "tridem," and “triaxle." 2. To clearly define the term "600 pounds per inch width of tire" as the "width of the tread in contact with the pavement." 3. To make the axle load limits the same throughout the statutes. 4. To suggest elimination of indentified discriminatory legislation. 5. To recommend additional legislation: a. to clearly define the purpose and use of "air-bag" suspension systems -- those that can be raised or lowered by the driver, and b. to enable vehicle weight enforcement officers to use shipping documents …

Effects Of Load Distributions And Axle And Tire Configurations On Pavement Fatigue, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

Damage factor relationships for axle and tire configurations are presented. Adjustment factors are provided to account for variations in load distributions within axle groups, distances between axles of a tandem, and variations in tire pressure for both dual and flotation tire configurations.

Properly accounting for accumulated fatigue of a pavement requires an accurate Measure of traffic volume, proportions of vehicle styles (classifications) within the traffic stream, dates of service, estimate of the average damage factor for each classification, and estimate of the tire contact pressure. Weigh-in-motion equipment in its current form provides all of the above ingredients except for the …

Unstable Subgrade, I 65, Hardin County (I 65 - 5 (17) 92; Fsp 047-0065-091-0396), Tommy C. Hopkins, Gary W. Sharpe

Kentucky Transportation Center Research Report

During construction of the southbound lanes of I 65, Stations 120+00 to 218+00, in Hardin County, Kentucky, near Elizabethtown, large deformations were observed when dense-graded aggregate (DGA) base courses were loaded with construction traffic. Rutting and cracking of the DGA also was noticeable. A study was performed to determine the causes of the unstable subgrade and base, recommend remedial actions, and evaluate the effectiveness of the remedial measures. The stability, or bearing capacity, of the unstable pavement was determined for different construction stages and combinations of pavement layer thicknesses using a relatively new stability model HOPK-I. The stability of the …

Nondestructive Evaluation Of Rigid Pavements Using Road Rater Deflections [1984], Gary W. Sharpe, Mark Anderson, Robert C. Deen, Herbert F. Southgate

Kentucky Transportation Center Research Report

Road Rater deflections have been used to determine in-place structural conditions of rigid and composite pavements, based on modifications of principles and experience with the structural evaluation of flexible pavements. Details of the use of elastic layer theory to simulate deflection measurements associated with loadings for the Kentucky Road Rater are presented. Included is an illustration of the use of field deflection measurements to "back calculate'" in-place moduli. The procedures are generally iterative and involve matching measured deflections with theoretical deflections. Elastic layer principles have been used to simulate deflections only at the midslab position. Relationships regarding deflections at other …

Pavement Thickness Designs Utilizing Low-Strength (Pozzolanic) Base And Subbase Materials, Gary W. Sharpe, Robert C. Deen, Herbert F. Southgate, Mark Anderson

Kentucky Transportation Center Research Report

This paper presents information whereby laboratory test data for pozzolanic base and subbase materials may be combined with elastic layer theory and a limiting strain criterion to determine thickness designs equivalent to conventional asphaltic concrete and crushed stone pavement structures. A summary of laboratory testing in Kentucky also is presented. An example thickness design determination is presented and includes an economic comparison of alternative designs with the conventional asphaltic – crushed stone thickness design.

An Evaluation Of Pavement Drainage Interstate 64, Rowan-Carter Counties, David L. Allen, Herbert F. Southgate

Kentucky Transportation Center Research Report

No abstract provided.

Development Of A Thickness Design System For Portland Cement Concrete Pavements, Herbert F. Southgate, James H. Havens, Robert C. Deen, Donald C. Newberry Jr.

Kentucky Transportation Center Research Report

This report covers the merger of criteria used in the Portland Cement Association's and MSHTO's pavement thickness design systems. The combined criteria is coupled with the principle of equal work as defined in classical physics to produce thickness design curves for portland cement concrete pavements. The thickness of portland cement concrete varied by approximately 0.15 inches for the same CBR and design EAL when the thickness of crushed-stone base varied from 3 to 6 inches. Therefore, the design thickness of the portland cement concrete is relatively insensitive to changes in thickness of the crushed stone base.

A Training Guide For Pavement Maintenance Personnel, Herpicc

Indiana Local Technical Assistance Program (LTAP) Publications

These Guidelines have been prepared as a reference for highway maintenance personnel responsible for patching pavements and are intended as a reference for the patching crew. The Guidelines are not intended to be a detailed reference describing the successes and failures of techniques and materials used by various agencies to construct pavement patches. The patching techniques and materials presented in these Guidelines are those which have been developed by research and successfully used by various agencies to patch highway pavements under various climatic or weather conditions.

The D-Cracking Phenomenon: A Case Study For Pavement Rehabilitation, James H. Havens

Kentucky Transportation Center Research Report

No abstract provided.

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 …

Report Of An Inspection Of Pavement Construction On The New Jersey Turnpike, L. E. Gregg

Kentucky Transportation Center Research Report

No abstract provided.

Stability Investigation Of Bituminous Pavements, Kentucky Highway Materials Research Laboratory

Kentucky Transportation Center Research Report

This stability investigation was started by the Bituminous Division of the Highway Materials Research Laboratory, Lexington, Kentucky during the month of October, 1944, and was completed the first of March 1945. The purpose of this investigation was to develop information on the design and control of asphalt pavements. The data presented may be used to compare mixes made from commercial aggregates with mixes containing local aggregates. It is believed that sufficient amount of reliable data is presented in this report to enable the design engineer to use the Marshall stability equipment and testing procedure to select the best available aggregate …