Engineering Commons^™

New Developments In Concrete Pavement Construction, Gordon K. Ray

Kentucky's Annual Forum on Transportation

No abstract provided.

"Planning Aspects Of The Highway Program", J. R. Harbison

Kentucky's Annual Forum on Transportation

No abstract provided.

"Compaction Of Flexible Pavements", Charles R. Foster

Kentucky's Annual Forum on Transportation

No abstract provided.

Federal-Aid Highway Financing, Henry Ward

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky Highway Conference Program [1961], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.

A Radar Refraction Correction For Symmetric And Nonsymmetric Tropospheric Index Distributions, Ralph J. Rainey Jr.

Electrical and Computer Engineering ETDs

The high precision radars now in use have demonstrated the need for more exact refraction correction than is afforded by any fixed "standard" refractive index profile. The precision capabilities are even substantial enough to cause concern over the possible effects of the non-symmetric index distribution which introduces azimuthal errors. However, the indications are that the present limitation on true range measurements are primarily due to limitations on the radar itself, and a "gross" average correction is adequate for many cases of interest.

Performance Report On Bridge Resurfacings With Silica Sand-Asphalt Mixture, Robert L. Florence

Kentucky Transportation Center Research Report

When the Maintenance Division found it necessary to resurface the Clark Memorial and Ashland-Coal Grove Bridges in 1958, a thin, silica sand-asphalt, wearing surface was recommended by the Research Division. The basis of the recommendations was the promising results obtained in laboratory testing and the apparently successful resurfacing of bridges with thin applications of silica sand-asphalt in the New York Area and elsewhere. The design and construction details pertaining to these two projects have been reported previously. This report is a record of the performance of the two projects and of the repair of spalled areas on the deck of …

Analysis Of Pavement Roughness, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

In earlier progress reports dealing with the development of triaxial acceleration analysis as applied to the evaluation of pavement riding qualities, of which this report is a continuation, riding comfort or discomfort was emphasized. The accelerations monitored then were evaluated in terms of g's per sec., or "jerk" which is considered by some authorities to be a more significant index of comfort. The earlier methods of analysis have been reviewed, and acceleration is considered here to be the most practical parameter to use as a measure of pavement roughness. Most of the equipment and instrumentation has been retained, and the …

Proposed Special Specification For Sand Asphalt, Skid-Resistant, Wearing Course, James H. Havens

Kentucky Transportation Center Research Report

Because of the prominence that natural, sandstone, rock asphalt enjoyed in Kentucky during the past 50 years, sand-asphalts and sheet-asphalt mixes have not been used very extensively for paving in Kentucky. This is somewhat unfortunate because the natural, sand stone, rock asphalt has not been available since about 1955 and because there is now a need for a fine-textured, skid-resistance, wearing course for resurfacing work as well as on new pavements. These circumstances, coupled with the realization (1953-54) that surface courses and chip seals using 100% limestone aggregates tend to become slick, have emphasized the need for specifications for sand-asphalts. …

A Method For The Design Of Foundations Supporting Highway Signs, Robert C. Deen

Kentucky Transportation Center Research Report

With the increased mileage of highways being built to high standards, the resulting high-speed travel requires that more and larger signs be installed to relay to the motoring public information they require. It would be desirable to have a method of design which will result in a foundation involving rather simple construction procedures. It was decided that a cylindrical, non-reinforced concrete foundation with an uniform diameter would be the most advantageous for construction purposes. It should be realized, however, tha(the most efficient shape theoretically is one that has increased diameters at the top and the bottom.

The resistance of a …

Experimental Paving Projects Using Curtiss-Wright’S Coal-Modified, Coal-Tar Binder (First Year Performance), James F. Hardymon

Kentucky Transportation Center Research Report

This report has been prepared as a sequence to the author's publication entitled, "Experimental Paving Projects using Curtiss-Wright's Coal-Modified, Coal-Tar Binder (Construction Phase)."

The previous study was concerned with the selection of test sites, the construction of the test and control sections, and the laboratory investigation performed before and d uring the construction period. This project started in April, 1959, when the Curtiss-Wright Corporation announced the development of a new and superior road-paving binder utilizing bituminous coal. The development was the result of their research program conducted in an effort to find new uses for coal and coal products.

Performance Survey Of Reinforced Concrete Pipe Culverts, Robert C. Deen, Ronald D. Hughes

Kentucky Transportation Center Research Report

Methods of installation and design criteria have tended to restrict the usefulness of rigid pipe culverts. With the increased mileage of highways which meet high standards, there has been an increase in the number of pipe culverts installed under high fills. This, of course, has accented the need for criteria for the proper design and installation of rigid pipe to obtain the maximum utilization of the pipe strength and to minimize the possible steelements that may occur in the road surface near the pipe installation or in the flow line of the pipe culvert.

In order to provide for an …

A Development Of An Equivalent Circuit Of A Hall Generator Which Utilizes A Flux Concentrator, Laurence L. Rosier

Electrical and Computer Engineering ETDs

The development of the transistor has brought about a great deal of research in the field of semiconductors. One of the results in this research is the development of the Hall effect. A number of new devices which utilize the Hall effect have been proposed; however, more theoretical and experimental work is required to determine which of these devices are practical. The success of the equivalent circuit approach in the other fields of electrical engineering suggests that an equivalent circuit which would represent Hall effect devices would be useful. The development of such an equivalent circuit should be centered about …

Performance Report On Application Of Wire Mesh Reinforcement To Asphaltic Concrete Pavement Overlays, Robert C. Deen, Robert L. Florence

Kentucky Transportation Center Research Report

During the past two decades an increasing mileage of portland cement concrete pavements has been resurfaced with bituminous concrete. This has generally proven to be a satisfactory and economical method of restoring, improving and enhancing the traffic service life of the highways. After a short period, however, cracks often begin to appear over the joints and cracks of the underlying concrete pavement. This condition is commonly referred to as "reflection cracking".

The presence of these reflection cracks are undesirable for a number of reasons. The open crack that develops may permit water to penetrate, often causing rave ling of the …

Evaluation Of A Vibratory Roller For Use In Compacting Bituminous Concrete Mixes, Robert C. Deen

Kentucky Transportation Center Research Report

According to Article 4.3.5-D-1 of the 1956 Edition of Kentucky's Standard Specifications for Road and Bridge Construction, a minimum of two rollers, one 3-wheeled roller and one tandem roller, shall be required on each state project involving bituminous concrete paving operations. A further requirement of the specifications is that additional rollers will be provided so that there is avaHable "...at least one roller for each 30 tons of the bituminous mixture per hour..." that is laid. This, of course, means that for paving operations involving the laying of the bituminous mixture at rapid rates, the contractor must have available and …

Light Gage Cold-Formed Steel Design Manual, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Commentary On The 1961 Edition, George Winter

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Local Control Of Crows By Trapping, C J. Woodbury

Journal of the Department of Agriculture, Western Australia, Series 4

THE common crow seen frequently around farms in the South-West is the raven (Corvus coronoides) whilst the pest of pastoral areas is the true Australian crow (Corvus cecilae).

Farmers and pastoralists, although recognising the importance of these birds as scavengers and destroyers of insects, particularly grasshoppers, sometimes for one reason or another, wish to reduce their numbers over a localised area.

Baiting with phosphorus has been used in the past, but the purpose of this article is to describe and illustrate a type of trap which has become universally known as the "Australian Crow Trap."

Water Conservation On The Farm, John W. Lewis

Journal of the Department of Agriculture, Western Australia, Series 4

SMALL scale conservation of water for agricultural use is becoming increasingly important throughout Australia.

As land development intensifies, it is natural that farmers turn to more dams and earthen tanks for stock water and irrigation.

Adequate water is essential to supply the carrying capacities made possible by improved pastures, and where greater quantities of water can be stored, fodder crops, pastures, orchards and vegetables can be irrigated.

Australian Tractor Tests : Fordson Farm Major : Report On Test No. 33, G H. Vasey, W. F. Baillie

Journal of the Department of Agriculture, Western Australia, Series 4

THIS Report is taken from the full Technical Report No. 33 of this test; test results are shown here in briefer form: fuller explanations are added.

Values quoted may be rounded out to two instead of three significant figures; to this extent the values may differ slightly but not significantly from those shown in the Technical Report.

Graphs of belt test performance, shown in the Technical Report, are not shown here.

Potatoes Sprinkler Irrigated From The Collie River, John W. Lewis

Journal of the Department of Agriculture, Western Australia, Series 4

THE highly productive soils of the flats along the Collie River at Roelands are an important source of many of our summer grown potatoes in this State.

Large areas are planted year after year, the record being held by Mr. Clarry Cox of Roelands, who has planted potatoes on the same seven acres every season since 1922.

Flooding Of Salt Land, C V. Malcolm

Journal of the Department of Agriculture, Western Australia, Series 4

Many farmers have expressed concern and some have gone to considerable expense in trying to alleviate flooding problems on salt affected land.

Some consideration will be given here to flooding, its causes, effects on salt encroachment, methods of prevention and alleviation.

Plan For Quality In Silage, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

SILAGE making time is fast approaching in the South-West.

Last minute preparations before harvesting will help avoid delays at the time of making this valuable fodder, thereby reducing the amount of costly spoilage caused by hold-ups.

Test 805: Case 310e (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Its Shearing Time, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

SHEARING will soon be taking place on your property. For a smooth annual wool harvest, remember:—

Australian Spark Arrester Tests : Test No. Spa-21 : Caterpillar D7 Turbocharger, W F. Baillie, G. H. Vasey

Journal of the Department of Agriculture, Western Australia, Series 4

FORMAL tests on spark arresters are conducted by The Tractor Testing Committee* at the Testing Station, Werribee, on behalf of those Companies concerned with tractors, engines or spark arresters who wish to have these equipments tested.

The arrester is tested on the engine it is specially designed for (as in this instance), or if it is sold for use on any or several engines, it is tested on an engine of the highest power for which the spark arrester is intended.

Automatic Waterers For Day Old Chickens, P Smetana, W. Ward

Journal of the Department of Agriculture, Western Australia, Series 4

ONE of the most tedious and time consuming tasks on a poultry farm is the provision of water to chicks from day old up to the age of three or four weeks.

Most poultry farmers use half-gallon glass fonts with metal bases for the first few weeks, until the chicks are old enough to use the automatic watering system usually situated along one wall of the brooder house.

This cumbersome glass font system can be replaced by the cheap and easily installed automatic watering system described below. This system has already been adopted by several local poultry farmers.

Engineer Intelligence Guide 32, Stream Hydrology And Hydraulic Structures, [1961], Army Map Service, Us Army Corps Of Engineers, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

Despite the title, this engineer intelligence guide (EIG) is a photo-interpretation handbook. It was intended to help photo-interpreters recognize streams, rivers, lakes, and other hydrologic features. The introduction says that the purpose is:

a) To give “the officer responsible for furnishing hydrologic and hydraulic data in an assigned area … an understanding of the usefulness and limitations of photography in furnishing the type of information needed …,” and to assist in planning requests for photographic coverages of the assigned area.

b) To give “photo-interpreters sufficient knowledge of hydrology and hydraulics to be able to satisfy requests for information that can …

Weed Control In Cereals : Aerial Spraying Trials, G R W Meadly

Journal of the Department of Agriculture, Western Australia, Series 4

SPRAYING cereal crops for weed control is now standard farming practice in Western Australia. Almost 500,000 acres of cereal crops, mainly wheat, are sprayed each year, and approximately three-quarters of this area is treated by aircraft.

Recent trials have shown that aerial application of 'extra low" volumes of hormone-like herbicides, with oil or water solvents, does not damage cereals if spraying is done at the right stage of growth.

Effects Of Solids On Friction Factor In A Sand-Water Mixture, Frank J. Capek

Masters Theses

"At the present time various industries in both the United States and Europe are very interested in using pipelines as a means of transporting solids. The pumping of solids in pipelines isn't new, however, many of the pipelines in use today were constructed on an empirical basis. This is primarily due to the lack of knowledge concerning the flow properties in fluid-solid mixtures and slurries. With this need for fundamental information in mind, the author made a study on the effect solids have on the friction factor in fluid-solid mixtures.

In this paper various percentages of fine and coarse sand …