Engineering Commons^™

The Measurement Of Explosively Induced Stresses In Rock-Like Materials With A Capacitive Transducer, Vincent Paul Crane

Masters Theses

"A capacitive transducer was developed for measuring the free surface motion in Hydrostone blocks loaded by an explosive plane wave generator approximately one foot from the specimen. The charge to specimen distance was adjusted to produce a single spall, the position of the fracture being noted on the recovered specimen. The longitudinal wave velocity in each specimen was determined by the ultrasonic pulse technique before each shot. From the above measurements the stress, strain and strain rate at the point of fracture were determined. An attempt was made to determine the actual fracture time with imbedded [sic] conductive graphite rods, …

Quality Of Surface And Subsurface Water In A Missouri Carbonate Karst Terrain (Dry Fork, Norman, And Benton Creek Watersheds), James Chi Huang

Masters Theses

"Little is known about the effect of carbonate karst terrain on water quality in the United States. Karst topography occurs over a large portion of Missouri and over a significant part of other midwestern states. The objectives of this study were the determination of the quality of surface and subsurface water in carbonate karst terrain and the investigation and evaluation of the effect of rainfall and runoff on water quality in the Meramec Spring area, east of Rolla, Missouri, during both the dry and wet seasons over the period of one year. Water samples were collected at a large number …

Some Effects Of Nickel On The Microbial Population Of Activated Sludge, Virgil Eugene Carr

Masters Theses

"The purpose of this investigation was to study the effects of nickel on the microbial population of activated sludge, to establish a relationship between effluent quality and changes in microbial population, and to determine the fate of nickel applied. Five one liter fill and draw activated sludge units were fed settled domestic sewage and received constant daily nickel doses of 1-10 mg/l, and a 50 mg/l slug dose applied after 27-30 days of operation. The parameters used were the chemical oxygen demand (COD) of the effluent and membrane filtered effluent, mixed liquor and effluent total suspended solids, mixed liquor volatile …

The Influence Of A Fixed Failure Plane On The Direct Shear Test, Kenneth Hodges Bell

Masters Theses

"The analysis of the direct or box shear test for determining the shear strength of a soil makes use of the assumption that the failure plane coincides with the plane of separation between the two halves of the box. Hvorsley, Roscoe, Hansen and others have theorized and experimentally shown that this is not always the case. The stress distributions on the failure plane, however it may be oriented, are not as uniform as generally assumed. This investigation was carried out to compare direct shear tests run on granular, air dry material where the failure was allowed to take place naturally …

Stress Analysis Of A Wall Footing Subjected To External Vertical Loads And Overturning Moments By The Finite Element Method, Adil Godiwalla

Masters Theses

"This investigation pertains to the stress analysis by the finite element method of a wall footing subjected to external vertical loads and external overturning moments. This problem has been reduced to a two-dimensional stress analysis problem by taking a unit length of the wall. A rectangular plate - element is used throughout this investigation. The development of the matrix equations is shown and the solution is performed by digital computer. Stresses in the horizontal direction show essentially linear variation which is in agreement with simple structural theory, while stresses in the vertical direction show severe perturbation near the column load. …

The Recovery And Characterization Of Organic Micropollutants From Missouri Subsurface Waters, John Warren Smith

Masters Theses

"The main objectives of this investigation were the recovery and partial characterization of organic micropollutants from Missouri subsurface waters and the evaluation of the number of filters in series required for effective removal of organic materials from water using the Carbon Adsorption Method.

The organics were recovered from a spring and two deep wells using three large capacity (1. 5 cu. ft.) activated carbon filters in series. Chloroform and ethanol were employed as primary elutants, but acetone and benzene were also investigated. Characterization was by organoleptic, chemical, and biological determinations, toxicity measurements, and solubility partitioning.

Organic materials were found in …

Gap-Graded Gravel For Asphaltic Paving Mixtures, Ernest Harrington Martin

Masters Theses

"The objective of this investigation was to determine if naturally occurring gap-graded gravel can produce asphaltic mixtures meeting minimum requirements for satisfactory pavement behavior.

Ten gap-graded mixes were blended by eliminating certain intermediate sized fractions or combination of fractions from the gradation of a control mix. The weight of the fractions eliminated was distributed to either the coarser or finer aggregate fractions.

All specimens were prepared and tested in strict accordance with procedures set forth in ASTM Designation D1559, "Resistance to Plastic Flow of Bituminous Mixtures Using Marshall Apparatus."

The physical properties compared and analyzed were (1) unit weight, (2) …

The Role Of Mortar Aggregate In The Strength Of Concrete : Technical Paper, Charles F. Scholer

JTRP Technical Reports

No abstract provided.

Automatic Technique For Abstracting Color Descriptions From Aerial Photography : Technical Paper, J. Gourley, Harold Teddy Rib, Robert Douglas Miles

JTRP Technical Reports

No abstract provided.

System Evaluation By The Simplified Proportional Assignment Technique : Progress Report, Hassan A. Ayad

JTRP Technical Reports

No abstract provided.

Some Orthosilicates And Their Hydrates, Larry E. Campbell

JTRP Technical Reports

No abstract provided.

Evaluation Of Safety At Railroad-Grade Crossings: Technical Paper, William D. Berg, Thomas Gordon Schultz, Joseph C. Oppenlander

JTRP Technical Reports

No abstract provided.

Distribution Of Stresses And Displacements Within And Under Long Elastic And Viscoelastic Embankments : Progress Report, George Y. Baladi

JTRP Technical Reports

No abstract provided.

Terrain Analysis By Computer : Technical Paper, A. Keith Turner, Robert Douglas Miles

JTRP Technical Reports

No abstract provided.

The Journey To Work: A Singular Basis For Travel Pattern Surveys : Progress Report, Gordon Shunk

JTRP Technical Reports

No abstract provided.

Stress Distribution Within And Under Long Elastic Embankments: Research Paper, William H. Perloff, George Y. Baladi, Milton Edward Harr

JTRP Technical Reports

No abstract provided.

Correlation Of Design Characteristics And Operational Controls With Accident Rates On Urban Arterials : Technical Paper, Thomas Mulinazzi, Harold L. Michael

JTRP Technical Reports

No abstract provided.

Tordon - 2,4-D Dimethylsulfoxide Combination Herbicides For Use In Roadside Development, D. James Morré

JTRP Technical Reports

No abstract provided.

Stress-Deformation Behavior Of Anisotropic Bituminous Mixtures: Technical Paper, Herbert William Busching, William Harner Goetz, Milton Edward Harr

JTRP Technical Reports

No abstract provided.

Evaluation Of Delays And Accidents At Intersections To Warrant Construction Of A Median Lane : Technical Paper, Robert B. Shaw, Harold L. Michael

JTRP Technical Reports

No abstract provided.

The Journey To Work: A Singular Basis For Travel Pattern Surveys : Technical Paper, Gordon Shunk, William Louise Grecco

JTRP Technical Reports

No abstract provided.

A Method For Comparing Alternate Pavement Designs, Edgar P. Ulbricht

JTRP Technical Reports

No abstract provided.

Development Of An Urban Street Needs Study: Technical Paper, Ronald G. Rude, Joseph C. Oppenlander

JTRP Technical Reports

No abstract provided.

Fracture Of Hardened Cement Paste : Progress Report, Steven John Hanna

JTRP Technical Reports

No abstract provided.

Simplified Procedure For Estimating Recreational Travel To Multi-Purpose Reservoirs : Technical Paper, Judson Stillman Matthias, William Louise Grecco

JTRP Technical Reports

No abstract provided.

Termites Or White Ants, Clee Francis Howard Jenkins

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

TERMITES are commonly but erroneously called "white ants."

Actually they are more nearly related to cockroaches than to ants, but their general appearance and subterranean habits have given strong support to the popular designation.

They may be divided into two major groups from an economic point of view, viz., wood-dwelling and earth-dwelling termites.

The Effect Of Epoxy Resin In Stone And Slag Concrete, James Chun-Min Chou

Masters Theses

"In concrete construction, the weight of the structure represents a large portion of the total load carried; thus, there is considerable advantage in reducing the weight of the concrete. To obtain this result, there are at least three approaches (1). The first method of producing lightweight concrete is by means of substituting a porous lightweight aggregate of low specific gravity for the ordinary aggregate. The second method relies on introducing large voids within the concrete or mortar mass; this is known as aerated, cellular or gas concrete. The third method is simply to omit the fine aggregate from the mix …

The Development Of A Modified Soil Shear Vane, Vernelle Truman Smith

Masters Theses

"The purpose of this investigation was to determine how the soil shear graph could be modified to measure more accurately values of shear strength of fine-grained, cohesive soils. Several modifications were tried, however, the one that gave the most satisfactory results consisted of a vane and base plate mechanism.

A red clay of high plasticity obtained from a local cave was tested in both the natural or undisturbed state and in the remolded state. The only variable was the moisture content. Compaction effort was the same for all remolded specimens. Tests were conducted on undisturbed samples taken with thin walled …

Checking Rigid-Framed Structures By Extended Moment-Area Equations, Lucky Li-Chi Chow

Masters Theses

"Using the known moments obtained from the moment distribution solution, the extended moment-area equations are used to check whether or not delta x, delta y, delta theta are truly zero, or are any other quantity they are supposed to be. In order to get a reasonably correct answer, a solution must meet both the elastic checks and the static checks for their equilibrium and compatibility functions. Using the extended moment-area equations, the magnitudes of the slopes and deflections at all of the joints in framed structures can be found easily"--Abstract, page ii.

The Shrinkage Characteristics Of Plastic Clay, Edward De Santis

Masters Theses

"This investigation was conducted to determine the shrinkage properties of a clay soil whose structure had been artificially altered in the laboratory. Various percentages of dispersing and flocculating agent were added to the soil and the shrinkage curves plotted.

The shrinkage curves of the chemically treated soil were compared with those of the untreated soil. The values of the theoretical and observed shrinkage limits were also compared to determine the validity of the standard shrinkage limit test which, at present, does not take into consideration the structure of the soil.

An explanation of the differences in the shrinkage characteristics of …