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Articles 4681 - 4710 of 5088
Full-Text Articles in Engineering
A Study Of The Effects Of Quick Freezing On Saturated Fragments Of Rocks, John W. Scott, George R. Laughlin
A Study Of The Effects Of Quick Freezing On Saturated Fragments Of Rocks, John W. Scott, George R. Laughlin
Kentucky Transportation Center Research Report
Quick freezing of a fragment of rock which is fully saturated with water is, perhaps, the most rigorous of all tests for soundness, durability, or resistance to weathering. So-called soundness or quality tests employed currently, or heretofore, for evaluating concrete aggregates are usually less rigorous inasmuch as the state of saturation at the outset of freezing is not at a critical level. Hence, the number of freeze-thaw cycles endured by a rock specimen undergoing freezing and thawing in the presence of available water may merely reflect the duration of the exposure before the rock becomes vulnerable to damage -- i.e., …
A Rheological Investigation Of Asphaltic Materials, W. A. Mossbarger Jr.
A Rheological Investigation Of Asphaltic Materials, W. A. Mossbarger Jr.
Kentucky Transportation Center Research Report
Asphalts, serving as cements or binders in bituminous pavements, behave essentially as purely viscous, mobile, liquids at high temperatures and assume varying degrees of viscoelasticity, plasticity, elasticity, etc., upon cooling. They stiffen to a semi-solid state at cold temperature and do not. exhibit a discrete melting or freezing point, Saal (1)* classifies bitumens into three types according to their rheological properties at normal temperatures. They are: 1) those which behave entirely or almost entirely like Newtonian liquids, 2) those which show elastic effects during initial deformation and which exhibit Newtonian flow thereafter, and 3) those which show almost complete resilience …
Fourth Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes
Fourth Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes
Kentucky Transportation Center Research Report
A stylized, rational criterion for the structural design and installation of reinforced concrete pipe culverts was developed by the Bureau of Public Roads in cooperation with Prof. M. G. Spangler of Iowa State College and the American Concrete Pipe Association and was distributed to the various state highway agencies, April 4, 1957, as Circular Memorandum 22-40.* The criterion was intended to bring together and simplify methods for computing the strengths required for various fill heights and conditions of bedding. The several highway agencies were urged to adopt the criterion for use on all Federal-aid projects and accordingly, the Kentucky Department …
Status Report On Landslide Area On I-75, Covington, Kentucky [August 1963], Robert C. Deen
Status Report On Landslide Area On I-75, Covington, Kentucky [August 1963], Robert C. Deen
Kentucky Transportation Center Research Report
This report has been prepared to describe the conditions of the landslide area on Interstate Route I-75 in Covington, Kentucky, since May 15, 1963, the date of an earlier status report. Subsurface data which has been collected and assembled during the past three months is also included. Possible corrective considerations have also been included in this report.
The rainfall data included in this report, as well as the previous status report (May 15, 1963), are the official 24-hour precipitation recorded by the U. S. Weather Bureau at the Greater Cincinnati Airport in Boone County, Kentucky. The airport is located approximately …
Interim Report On Rural Secondary, Base Stabilization Projects, Robert C. Deen, J. D. Shackelford
Interim Report On Rural Secondary, Base Stabilization Projects, Robert C. Deen, J. D. Shackelford
Kentucky Transportation Center Research Report
Early in 1962, the Division of Rural Highways selected several base stabilization projects for construction during the 1962 season. These projects were to involve the addition of 1-1/2 to 3 inches of compacted granular base to existing, rural secondary, traffic-bound macadam roads. Since these roads were not intended to be surfaced, calcium chloride and sodium chloride were to be added to the additional granular base material in an attempt to retain or "hold" the aggregate on the road. This treatment was in tended to improve the road and to build up the base over a period of a few years …
Status Report On Landslide Area On I-75, Covington, Kentucky [May 1963], Robert C. Deen
Status Report On Landslide Area On I-75, Covington, Kentucky [May 1963], Robert C. Deen
Kentucky Transportation Center Research Report
This report has been prepared to describe the history and present condition of a landslide area on Interstate Route I-75 in Covington, Kentucky, This landslide is one of several to be studied as part of a research project on the "Development of a Practical Method of Locating and Tracing Seepage Water in Unstable Slopes. " On April 10, 1963, a request was submitted to the Bureau of Public Roads to change the Work Program HPS-1(24) to include this research project. Approval was received on May 2, 1963. Work done on this research project prior to May 2 was at Department …
Experimental Use Of Thermo-Plastic Pavement-Striping Materials, James H. Havens
Experimental Use Of Thermo-Plastic Pavement-Striping Materials, James H. Havens
Kentucky Transportation Center Research Report
The purposes and objectives of this experimental study are: 1) to evaluate the application and performance characteristics of hot-melt plastic, pavement-striping materials which are presently prominent and known commercially as "Catatherm" and "Perma-Line"; 2) to compare the performance of these materials with the performance of painted stripes applied and re-newed according to the current practices of the Kentucky Department of Highways; and 3) to evaluate the economics of these striping materials in terms of cost-per-mile per-day-of-useful-life, The project is described more fully in the "Proposal... " (approved by Division Engineer, September 7, 1962) and in Report No. 1 (Pre-Construction Report) …
Inspection-Performance Report; Plant-Mix, Initial Treatment; Morgantown-Woodbury Road, Butler County, Robert L. Florence
Inspection-Performance Report; Plant-Mix, Initial Treatment; Morgantown-Woodbury Road, Butler County, Robert L. Florence
Kentucky Transportation Center Research Report
No abstract provided.
Slurry Seal Maintenance And Test Applications Of 1962, Robert L. Florence
Slurry Seal Maintenance And Test Applications Of 1962, Robert L. Florence
Kentucky Transportation Center Research Report
No abstract provided.
On A Highway Built By You, Ben West
On A Highway Built By You, Ben West
Kentucky's Annual Forum on Transportation
No abstract provided.
Quality Requirements For Concrete Aggregates, Stanton Walker
Quality Requirements For Concrete Aggregates, Stanton Walker
Kentucky's Annual Forum on Transportation
No abstract provided.
The Green River Bridge On The Western Kentucky Turnpike, Carl P. Kroboth
The Green River Bridge On The Western Kentucky Turnpike, Carl P. Kroboth
Kentucky's Annual Forum on Transportation
No abstract provided.
Introductory Remarks For Green River Bridge Over Western Ky. Turnpike, Robert M. Gillim
Introductory Remarks For Green River Bridge Over Western Ky. Turnpike, Robert M. Gillim
Kentucky's Annual Forum on Transportation
No abstract provided.
The Effects Of Limited Access Highways On Adjacent Property Values, Kenneth E. Cook
The Effects Of Limited Access Highways On Adjacent Property Values, Kenneth E. Cook
Kentucky's Annual Forum on Transportation
No abstract provided.
Recent Developments In Maintenance Concepts, Robert F. Baker
Recent Developments In Maintenance Concepts, Robert F. Baker
Kentucky's Annual Forum on Transportation
No abstract provided.
Highway Maintenance Equipment, Paul E. Boyer
Highway Maintenance Equipment, Paul E. Boyer
Kentucky's Annual Forum on Transportation
No abstract provided.
The Research Program Of County Road Management, Howard Bussard
The Research Program Of County Road Management, Howard Bussard
Kentucky's Annual Forum on Transportation
No abstract provided.
Address [1963], Bert T. Combs
Address [1963], Bert T. Combs
Kentucky's Annual Forum on Transportation
No abstract provided.
The Significance Of Highway Maintenance, Bertram D. Tallamy
The Significance Of Highway Maintenance, Bertram D. Tallamy
Kentucky's Annual Forum on Transportation
No abstract provided.
Excerpts From Address [1963], Henry Ward
Excerpts From Address [1963], Henry Ward
Kentucky's Annual Forum on Transportation
No abstract provided.
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 …
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 …
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.
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 …