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Articles 5521 - 5550 of 5911
Full-Text Articles in Engineering
Kentucky Highway Conference Program [1963], Kentucky Transportation Center
Kentucky Highway Conference Program [1963], Kentucky Transportation Center
Kentucky's Annual Forum on Transportation
No abstract provided.
Some Effects Of Fabrication Practices On The Strength Characteristics Of Reinforced Concrete Culvert Pipe, Robert C. Deen, James H. Havens
Some Effects Of Fabrication Practices On The Strength Characteristics Of Reinforced Concrete Culvert Pipe, Robert C. Deen, James H. Havens
Kentucky Transportation Center Research Report
Underground conduits have been used for hundreds of years for drainage and water supply purposes. With the advent of railway and auto-mobile transportation, the use of underground conduits for drainage purposes beneath the roadways increased greatly. It soon became apparent that there was a definite need for knowledge concerning the manufacture, installation, and field behavior of pipe culverts. Accordingly, in the first half of the century, much attention and research has been directed toward the development and establishment of acceptable techniques and specifications fot the manufacture and installation of pipe culverts. This work has been accomplished by many individuals and …
Concrete, Bridge Decks: Deterioration, Coatings And Repairs, James H. Havens, William B. Drake
Concrete, Bridge Decks: Deterioration, Coatings And Repairs, James H. Havens, William B. Drake
Kentucky Transportation Center Research Report
This report is not wholly a culmination of a planned or programmed research project. It is a historical account of damage sustained by both new and old concrete bridge-decks -- through freeze-thaw, salt action, etc, -- and of some expedient repairs which have been effected. The problem of durability in concrete bridge-decks has become increasingly critical during the past ten years or so and is now a major concern to highway engineers throughout the northern tier of states. While there is not yet a concerted agreement in regard to the cause of the trouble, relief is being sought through improved …
Fundamental Principles In Paint Technology, James H. Havens
Fundamental Principles In Paint Technology, James H. Havens
Kentucky Transportation Center Research Report
There are certain fundamental volumetric relationships which should be observed in designing and formulating paints for various uses.
A Study Of The Hydraulics Of Drop-Inlet-Type Culvert Models, Ronald D. Hughes
A Study Of The Hydraulics Of Drop-Inlet-Type Culvert Models, Ronald D. Hughes
Kentucky Transportation Center Research Report
In certain unique situations, a drop-inlet-type of culvert might be employed to a greater advantage than the standard box- or pipe-type culvert. A drop-inlet consists merely of a vertical drop-section at the upstream end of the culvert. The drop section is connected to the main barrel of the culvert by means of an elbow or merely a rightangle intersection. The entrance to the drop-section must collect and funnel the channel water into the drop section. Thus, intercepting dams and sidewalls may be needed to form the entrance. Figure 1 illustrates, in a general way, some of the options which may …
Third Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes
Third Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes
Kentucky Transportation Center Research Report
In April, 1957, under Circular Memorandum 22-40, the Bureau of Public Roads issued a rational criterion covering beddings of reinforced concrete pipe, construction methods, and simplified methods for determining the allowable heights of fill over pipe having given D-load strengths. The states were urged to adopt the criterion; and, accordingly, the Kentucky Department of Highways issued Amendments No. 15 and 16 (Feb, 28, 1958) to its 1956 edition of Standard Specifications for Road and Bridge Construction and Standard Drawings Nos. 11.22 and 11.23. These amendments and standard drawings were patterned after the criterion of the Bureau of Public Roads but …
Construction Report On Experimental Use Of Natural, Bituminous, Quartz Sandstone (Kentucky Rock Asphalt) As A Traffic-Bound Aggregate, George R. Laughlin
Construction Report On Experimental Use Of Natural, Bituminous, Quartz Sandstone (Kentucky Rock Asphalt) As A Traffic-Bound Aggregate, George R. Laughlin
Kentucky Transportation Center Research Report
Major deposits of natural, bituminous, quartz sandstone (Kentucky Rock Asphalt) occur in six counties of western Kentucky and a few minor deposits occur in eastern Kentucky. Crushed rock asphalt has been used extensively in Kentucky and elsewhere for over 50 years for surfacing roads.* The most productive area was in Edmonson County where the Caseyville and Bee Springs formations were quarried and mined. These deposits have been described as oil-pools which are now defunct and from which only the asphaltic residue remains. The bitumen content of the rock varies locally in a quarry or mine; and, because of this, enormous …
Investigation Of Aggregate Occurrence In Logan County, Kentucky, George R. Laughlin
Investigation Of Aggregate Occurrence In Logan County, Kentucky, George R. Laughlin
Kentucky Transportation Center Research Report
As requested in your memorandum of September 12, we have conducted an extensive series of tests on the natural sand produced by Kapco Construction Company in Logan County. There was some question regarding the classification of the sand -- whether it would be termed a manufactured, a crushed conglomerate, or a natural sand. I had Mr. George R. Laughlin, Geologist of the Research Division, visit and inspect the pit. A copy of Mr. Laughlin's report to me is attached for your file. He reports that the material being produced is a washed, natural sand and similar in production procedure to …
Laboratory Test Results On Natural Sand Produced By The Kapco Construction Company In Logan County, Ronald D. Hughes
Laboratory Test Results On Natural Sand Produced By The Kapco Construction Company In Logan County, Ronald D. Hughes
Kentucky Transportation Center Research Report
On September 19, 1962, a sample of sand produced by the Kapco Construction Company was received by the Research Division. This material was sampled at the quarry in Logan County and forwarded to the Research Division by personnel from District No. 3 of the Bowling Green Office. The sample was submitted for laboratory evaluation in regard to possible use of the material as fine aggregate in Class A concrete.
Study Of Light Compaction-Equipment For Maintenance Patching, Robert L. Florence
Study Of Light Compaction-Equipment For Maintenance Patching, Robert L. Florence
Kentucky Transportation Center Research Report
Patching pot-holes and resurfacing small areas of pavement entail certain compaction-equipment difficulties for the maintenance crews. Areas in need of repair are often small but may be widely scattered. Large steel-wheeled rollers are difficult to transport from one location to another and tend to bridge across small, deep pot-holes. The bridging effect can be reduced by use of small rollers or pneumatictired rollers, which conform better to the area to be patched. The efficiency of a patching crew depends greatly upon its mobility. The compaction equipment, therefore, should be portable, should conform to the area to be repaired, and should …
Special Provisions For Non-Leafing Aluminum, Basic Lead Silico-Chromate Oil-Alkyd Finish-Coat Paint For Guard Rails And Bridges, William B. Drake
Special Provisions For Non-Leafing Aluminum, Basic Lead Silico-Chromate Oil-Alkyd Finish-Coat Paint For Guard Rails And Bridges, William B. Drake
Kentucky Transportation Center Research Report
These provisions cover the material requirements for a pre-mixed, non-leafing aluminum, basic lead silico-chromate, oil-alkyd finish-coat paint which is intended for use in one or two finish-coat applications. This paint is considered to be compatible with undercoat paints currently covered by Special Specification No. 14-56b and may be substituted for the green finish-coat, Para. IV, therein, when so indicated by appropriate notations on the plans, proposals, invitations, etc. This paint may be used for either new or re-paint work on bridges, guard rails, and other steel structures as may be designated. Undercoat paints, when required, shall be in accordance with …
The Kentucky Department Of Highway’S Scholarship Program, D. V. Terrell
The Kentucky Department Of Highway’S Scholarship Program, D. V. Terrell
Kentucky Transportation Center Research Report
The Kentucky Department of Highways was organized in 1912, at that time the field of highway engineering was new, little was actually known about the scientific process of building roads, there were no highway engineers as such. The civil engineer because of his experience in the construction of railroads and public works was to become the highway engineer in the future. As road building began to be an important fact, most schools added courses in highway construction to the already over-crowded field of civil engineering, and highway engineering today is considered on of the major branches of the broad field …
Processed Kentucky Rock Asphalt, P. F. Phelan
Processed Kentucky Rock Asphalt, P. F. Phelan
Kentucky Transportation Center Research Report
Attached are three copies each of two laboratory reports covering tests on a 50 lb. sample of processed Kentucky rock asphalt forwarded to our laboratory by Mr. C. H. McKinney. The sample arrived June 6. These reports include results of laboratory analysis and evaluation tests - and small scale road tests - to determine the proper amount of tar to be added to the processed material to produce a satisfactory road surfacing mixture.
Laboratory Testing Of Wet-Processed Kyrock, Robert L. Florence
Laboratory Testing Of Wet-Processed Kyrock, Robert L. Florence
Kentucky Transportation Center Research Report
No abstract provided.
Structural Repair Of Concrete Pavement, Barren County Project U 543(3), William B. Drake
Structural Repair Of Concrete Pavement, Barren County Project U 543(3), William B. Drake
Kentucky Transportation Center Research Report
The Research Division assisted the District Construction personnel with structural repairs of five areas of cement concrete pavement that had been adjudged unsatisfactory. I had an opportunity to observe the repaired areas on July 19, 1962, and they all appear to be performing. adequately. The color of the epoxy patching material does not completely match the adjacent concrete but with normal weathering the two materials should approach a better match.
Comments On: Aasho Interim Guide For The Design Of Rigid Pavement Structures (Aasho Committee On Design, February, 1962), James H. Havens, Ronald D. Hughes
Comments On: Aasho Interim Guide For The Design Of Rigid Pavement Structures (Aasho Committee On Design, February, 1962), James H. Havens, Ronald D. Hughes
Kentucky Transportation Center Research Report
We have reviewed the AASHO Interim Guide for the Design of Rigid Pavement Structures, and Messrs. Havens and Hughes of our staff have prepared comments on the guide. These comments do not deal entirely with the rigid pavement guide, but rather compare some of the design concepts from the Flexible Pavement Interim Guide.
The Application Of Nuclear Techniques To The Measurement Of Moisture And Density Of Highway Construction Materials, Robert C. Deen, J. D. Shackelford
The Application Of Nuclear Techniques To The Measurement Of Moisture And Density Of Highway Construction Materials, Robert C. Deen, J. D. Shackelford
Kentucky Transportation Center Research Report
In recent years much attention has been directed toward the application of neutron and gamma ray techniques to soil moisture and density measurements. This application of radiological measurements of these characteristics of materials of highway construction, of course, is of great interest to the highway industry since the performance of the total pavement system is highly dependent upon the condition of the embankment, subgrade, and base components of this system. An important measure of the state of condition of unconsolidated earth materials is their unit weights and moisture contents. The highway engineer undoubtedly would welcome any method or technique which …
Pavement Roughness Studies (A Progress Report), Rolands L. Rizenbergs
Pavement Roughness Studies (A Progress Report), Rolands L. Rizenbergs
Kentucky Transportation Center Research Report
Road roughness testing in Kentucky was first reported in 1949 (1). At that time, emphasis was placed on localized irregularities in pavement profiles detectable by a roller-type straight edge. The experience gained then pointed to the necessity for making a fast, continuous recording of characteristics of the road which would be more closely related to riding quality. Subsequent progress reports (2)(3) dealing with the development of triaxial acceleration as applied to the evaluation of pavement riding qualities emphasized riding comfort or discomfort. The accelerations monitored then were evaluated in terms of g's per seconds or "jerk", which is considered by …
Engineering Properties For Soil Series Mapped In Kentucky, Robert C. Deen
Engineering Properties For Soil Series Mapped In Kentucky, Robert C. Deen
Kentucky Transportation Center Research Report
Soil maps, and particularly engineering soil maps, are proving to be desirable in the planning and design stage of many types of structures and land developments. Problems associated with foundations, drainage and soil behavior may be recognized at a very early stage during the preliminary location and site selection through the use of adequate soil maps.
Development In Nuclear Moisture Density Testing, R. C. Deen
Development In Nuclear Moisture Density Testing, R. C. Deen
Kentucky's Annual Forum on Transportation
No abstract provided.
Highway Legal Problems, William A. Lamkin Jr.
Highway Legal Problems, William A. Lamkin Jr.
Kentucky's Annual Forum on Transportation
No abstract provided.
Highway Materials Research Laboratory—1942-1962, D. V. Terrell
Highway Materials Research Laboratory—1942-1962, D. V. Terrell
Kentucky's Annual Forum on Transportation
No abstract provided.
The Need For Coordination Of Urban Improvement Programs, James Smith
The Need For Coordination Of Urban Improvement Programs, James Smith
Kentucky's Annual Forum on Transportation
No abstract provided.
Operating Problems On The Kentucky Interstate Highway System, K. B. Jones
Operating Problems On The Kentucky Interstate Highway System, K. B. Jones
Kentucky's Annual Forum on Transportation
No abstract provided.
Techniques Of Urban Transportation Studies, Robert Vogt
Techniques Of Urban Transportation Studies, Robert Vogt
Kentucky's Annual Forum on Transportation
No abstract provided.
Financing Streets: Summary And Possible Solutions, James W. Martin
Financing Streets: Summary And Possible Solutions, James W. Martin
Kentucky's Annual Forum on Transportation
No abstract provided.
Rural Highway Maintenance Policies And Procedures By Department Maintenance Force, L. E. Richardson
Rural Highway Maintenance Policies And Procedures By Department Maintenance Force, L. E. Richardson
Kentucky's Annual Forum on Transportation
No abstract provided.
Base Stabilization, Walter Spencer, James C. Johnson, C. M. Foard, P. F. Phelan, E. G. Robbins, R. S. Boynton, W. E. Dickinson, R. L. Greenman
Base Stabilization, Walter Spencer, James C. Johnson, C. M. Foard, P. F. Phelan, E. G. Robbins, R. S. Boynton, W. E. Dickinson, R. L. Greenman
Kentucky's Annual Forum on Transportation
No abstract provided.
Ultimate Strength Of Reinforced Concrete Beams In Combined Torsion And Bending, Fred Schuette
Ultimate Strength Of Reinforced Concrete Beams In Combined Torsion And Bending, Fred Schuette
Kentucky's Annual Forum on Transportation
No abstract provided.
Economic Possibilities Of High Strength Low Alloy Steel In Highway Bridges, S. P. Maggard
Economic Possibilities Of High Strength Low Alloy Steel In Highway Bridges, S. P. Maggard
Kentucky's Annual Forum on Transportation
No abstract provided.