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The Magnitude And Directions Of Strains And Stresses In Edge Loaded Concrete Slabs, William M. Baldwin

Masters Theses

"The concrete industry in the United States represents one of the fastest growing segments of the national economy. Many reasons for this may be given, among which are, the durability of concrete structures, the local availability of a large portion of the materials used in concrete, and its wide range of adaptability to the designs of engineers and architects.

One of the most recent changes in concrete usage is the change from reinforced concrete to prestressed concrete. The term prestressed as used herein refers to any type of reinforced concrete in which the reinforcing material has a stress prior to …

Test 633: Oliver Oc-15, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 632: John Deere 830 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 613: Case 311 Gasoline, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT:

TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.

This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker, point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.

BELT HORSEPOWER TESTS

TEST B: The throttle …

Servomechanism Compensation With An Active Phase-Lead Network, Robert T. Dewoody

Masters Theses

"The problem is to develop a phase-lead compensation network for a servomechanism which will not reduce the low-frequency gain and thus decrease the velocity-lag error. The principal part of this thesis deals with the design of such an active phase-lead network. The active network does not have d-c coupling; this eliminates drift problems.

To illustrate an active phase-lead network a simple second order servomechanism is used as a basis for comparing three methods of compensation.

The first method is compensation with a conventional phase-lead network with a gain decrease. The second method is compensation with a conventional phase-lead network with …

Influence Of Some Metals On The Rate Of Corrosion And Deposition Of Titanium In Molten Salt Baths, Yu-Pu Huang

Masters Theses

"2. The purpose of this investigation. The substances obtained by corrosion of titanium in fused salts, if leached with water and dried, are composed of three kinds of products, namely of black, gray and yellowish ones. The black product was identified by X-ray diffraction as titanium-oxygen alloy with 9-10% by weight oxygen which later was used as coating material instead of the titanium sheet for deposition experiments described previously. The yellowish product was identified as rutile. The grayish product was also rutile but containing some titanium powder. Of these three products only the black one possessed the ability to deposit …

Physical Properties Of Concrete At Early Ages, Curtis E. Weddle Jr.

Masters Theses

"The introduction of the motor vehicle and the subsequent rapid expansion of the highway systems of the United States have brought with them many problems.

The Civil Engineer, in his attempts to provide adequate safe avenues of travel for the populace, has been faced with many problems. Handicapped by the need for speed in design and lack of information of the trends in motor vehicle design, the engineer has been forced at times to utilize design methods inconsistent with good engineering practices.

Of the many types of pavement sections which have been designed in an effort to provide structurally and …

An Investigation Of The Dissolution Of Hafnium-Free Zirconium In Hydrofluoric Acid And The Effect Of Fluoride Additions, Alfred S. Neiman

Masters Theses

"Hafnium-free zirconium has assumed great importance in commercial use in recent years. When economical methods were developed in 1950 to remove hafnium from Zr, a metal was produced which not only exhibited good corrosion resistance and desirable physical properties, but also had a very low absorption cross section for thermal neutrons. Such a metal could obviously be utilized to advantage as a structural material for nuclear reactors. This application is the most important one for Zr at present.

Good corrosion resistance to most mineral acids is one of the outstanding non-nuclear properties of Zr. Hf-free Zr has good corrosion resistance …

Development Of Rating Curves For Concrete Rebound Hammer On Concrete Specimens From Local Aggregates, Rolla Smith Lush

Masters Theses

"Frequently engineers find it imperative to determine the compressive strength of concrete as it exists in a structure. There are two methods of making this determination, either by a destructive or a non-destructive test. The destructive test has the disadvantage of being costly, time consuming, and detrimental to the appearance of the concrete surface. The non-destructive, pulse-velocity, sonic measuring devices used to determine the compressive strength of concrete in the field also have the disadvantage of high cost due to the large initial cost of the equipment.

A relatively new non-destructive testing device has been developed which may replace the …

Statistical Analysis Of X-40 (Stellite-31) Production Blends., Edward P. Patterson

Masters Theses

"An investigation was undertaken to statistically analyze the data obtained on X-40 (Stellite 31) production blends which were tested to the requirements of AMS 5382. For our purpose a blend is one or more furnace heats, the shot of which has been thoroughly mixed to produce greater uniformity of product. The mixed shot is charged to the arc furnaces and cast into parts, and test specimens. A great range of test results have been obtained in testing blends, and it was felt that a statistical analysis of a few of the variables might yield information which could be applied toward …

A Determination Of The Sonic Modulus Of Early Age Concrete, William Dale Nelson

Masters Theses

"The problem which the writer is analyzing in this thesis was suggested by Professor E. W. Carlton of the Civil Engineering Department. It is a determination, by use of sonic testing equipment, of the growth in the sonic modulus of early age concrete.

Since 1938 when T. C. Powers published his paper, "Measuring Young's Modulus of Elasticity by Means of Sonic Vibrations", in the proceedings of the American Society of Testing Materials, Vol. 38, Part II, a great deal of work has been done on the applications of sonic testing of concrete. It began a new era in concrete testing, …

A Comparative Determination Of Weld Shearing Values In Welded Wire Reinforcement Fabric, Ernest Charles Kobs

Masters Theses

"At the suggestion of Professor E. W. Carlton, Chairman, Civil Engineering Department, Missouri School of Mines and Metallurgy, the author selected as subject for research thesis, “A Comparative Determination of Weld Shear Values in Welded Wire Reinforcement Fabric”.

In 1948, the Wire Reinforcement Institute initiated a research program to measure the actual stresses, including weld shear stresses, that occur in Welded Wire Fabric when used as reinforcement in a concrete slab. A great majority of this research was under the supervision of Professor Carlton.

The results of these investigations indicated a wide variation in strength of welds. As a means …

The Strength Of Bituminous Mixtures And Their Behavior Under Repeated Loads, Part 2, Leonard E. Wood, William Harner Goetz

JTRP Technical Reports

No abstract provided.

A Literature Survey On Soil Stabilization Lime-Flyash Admixtures : Informational Report, F. Kocataskin

JTRP Technical Reports

No abstract provided.

Pumping Of Highway And Airfield Pavements: Technical Paper, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.

Power Augers And Earth Resistivity Units As Supplements To Drilling Machines, D. G. Shurig

JTRP Technical Reports

No abstract provided.

Summary Report On State Highway Needs In Indiana, Donald O. Covault, Harold L. Michael, Arthur K. Branham

JTRP Technical Reports

No abstract provided.

Selection And Retention Of Civil Engineer Employees : Technical Paper, Arthur K. Branham

JTRP Technical Reports

No abstract provided.

Principles Of Soil Stabilization : Technical Report, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.

Progress Report No. 1 On The Uses Of Fly Ash In Highway Materials: Results Of Tests On Mortars And Concretes Containing A Mechanically Precipitated Fly Ash, F. Kocataskin, John Francis Mclaughlin

JTRP Technical Reports

No abstract provided.

The Federal Aid Highway Act Of 1956 -- Its Implications, Benefits And The Problem Of Highway Cost Allocation : Technical Paper, Arthur K. Branham

JTRP Technical Reports

No abstract provided.

Indiana's Highway Needs Study : Technical Paper, Donald O. Covault

JTRP Technical Reports

No abstract provided.

Triaxial Testing Of Bituminous Mixtures At High Confining Pressures : Technical Paper, Joseph C. Oppenlander, William Harner Goetz

JTRP Technical Reports

No abstract provided.

A Review Of Research On Deleterious Substances In Concrete Aggregates : Technical Paper, Robert Lee Schuster

JTRP Technical Reports

No abstract provided.

The Effect Of Base Course Gradation On The Results Of Laboratory Pumping Tests : Technical Paper, W. P. Chamberlin, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.

Considerations Of Equipment, Methods And Standards Of Accuracy Applicable To Aerial Surveys For Different Purposes : Technical Paper, Robert Douglas Miles

JTRP Technical Reports

No abstract provided.

Highway Highlights Of 1956 And The Challenge Ahead : Technical Paper, Arthur K. Branham

JTRP Technical Reports

No abstract provided.

Selection And Retention Of Civil Engineers, Arthur K. Branham

JTRP Technical Reports

No abstract provided.

Lane Use Control On Urban Thoroughfares, Kevin A. Macnaughton

JTRP Technical Reports

No abstract provided.

Annual Report Of The Assistant Director, 1956-1957, Harold L. Michael

JTRP Technical Reports

No abstract provided.