Civil and Environmental Engineering Commons^™

Electrolytic Corrosion Of Reinforcing Steel In Concrete., Lawrence D. Green

Masters Theses

"Deterioration of bridge decks has increased the interest in the corrosion of steel in concrete. A comprehensive review of literature on the subject of electrolytic corrosion of steel in concrete is presented in this thesis.

Development of theory from the literature leads to the following statements. There are two causes for electrolytic corrosion of steel in concrete, stray currents from direct current power sources and the formation of macro-cells within the structure. The corrosion caused by the macro-cells appears to be the more important of the two. Anodic areas exhibit corrosion of the steel and cracking of the concrete.

Many …

A Study Of The Relationships Between The Structure And The Consolidation And Swell Characteristics., Victor Foute Spruill

Masters Theses

"This paper reports the experimental results of an investigation of the relationships between the consolidation and swell characteristics of a cohesive soil and the structure of the soil. Consolidation and swell tests were run on samples prepared at their liquid limits in order to permit the effects of structure to show up in the results. The series of samples tested consisted of Putnam Clay Soil with (1) 2% sodium carbonate added, (2) no admixture, (3) 1% calcium hydroxide, and (4) 4% calcium hydroxide. Determinations were made of the per cent consolidation and per cent swell, decrease and increase in height …

Economical Span Length Ratios For Four Span Continuous Girder Bridges., C. C. Jogani

Masters Theses

"This study presents the results of an analysis of maximum movement in a four span continuous bridge with total span length of 100¹, 200¹, 300¹, and comparison with maximum moment on three span continuous bridge with total span length of 200¹ and 300¹. The four span continuous bridge was found to have a maximum moment which was 46% that of the three span bridge at both 200¹ and 300¹ length"-Abstract p. ii

The Effect Of Haunched Members On Vierendeel Trusses, Rashmikant D. Parikh

Masters Theses

"The purpose of this study was to analyze a Vierendeel Truss and determine the effect of haunches on moments. Loads were applied at the interior panel points in sequence. The classic slope-deflection method with coefficients taken from a table of frame constants (8) was used for the analysis.

In this investigation, one effect of haunches was determined to be the distribution of moments more evenly throughout the structure. Also, they insure rigidity of the joints and increase architectural flexibility"--Abstract, page ii.

Behavior Of Clay Under Compaction By Vibratory Rollers., Glenn R. Taylor

Masters Theses

"This thesis presents an analysis of the behavior of a lean clay when compacted by commercial vibratory rollers using the results of field investigations conducted by the U. S. Army Engineer Experiment Station, Vicksburg, Mississippi. Conclusions reached indicate that a lean clay soil will behave substantially the same under compaction by a vibratory roller as it does under other conventional methods of field compaction. The relationship of amplitude to the density and moisture content is also examined in this paper with the conclusion that the variations in amplitude of a vibratory roller is not significant as a measure of the …

Swelling Properties Of Putnam Soil, Oscar M. Palma

Masters Theses

"Volume change of Putnam soil under different moisture contents and the swelling pressure developed by the soil at the same moisture contents were investigated using standard test procedures.

The theory of one dimensional consolidation of Terzaghi was reviewed as well as the literature on swelling and swell pressure.

It was found that swell depends mainly on the initial water content, while swelling pressure depends mainly on the dry density of the soil"--Abstract, page ii.

Effect Of Stiffness Ratio On Stresses In A Rigid Frame., James Juh-Ling Tang

Masters Theses

"The elastic center method has been used to analyze several rigid frames with different geometric configurations and with component members of variable cross-sections. The basic approach is to divide the frame into small segments to solve this problem. From this analysis the best frame which is in the range of an economical design may be obtained for a given loading condition"--Abstract, p.2

Interaction Curve For A Beam Column., Mahendra Khushalchand Sanghavi

Masters Theses

"The theoretical interaction curve for a circular section is established. Experimentally the interaction curve f or a beam-column with a varying circular cross section, is established. The effect of stress history is discussed, and the comparisons of different interaction curves are made"--Abstract p.i

An Engineering Evaluation Of Surficial Soils Of Dent County, Missouri, William L. Durham

Masters Theses

“This study is the report of an investigation to: Determine the engineering characteristics of Dent County, Missouri soils using a pedologic soil association map for areal extrapolation of soil test data; and, Evaluate the feasibility of determining the engineering characteristics of all Ozark Region soils by the same method.

During the course of the study, the geology and pedology of the county was investigated and a sampling and testing program formulated. Pedologic soil types in each soil association area were sampled, tested in the laboratory, and the results interpreted.

The results obtained showed that the engineering characteristics of the soil …

A Simplified Method Of Estimating Drilling And Blasting Costs Of A Highway Through-Cut Excavation In Rock, Donald J. Roberts

Masters Theses

"The development of cost estimating methods has been the most neglected phase of highway engineering. Overlooked in particular has been the development of an easily understood and easily applied method of estimating the costs of the drilling and blasting operations involved in a highway through-cut excavation in rock.

This investigation developed such a method by adapting and applying recent developments in the blasting planning field. The study was limited to small diameter blastholes and excavations in lifts of less than thirty feet. Normal efficient construction practices were presumed.

It was found from the investigation that the blast geometry and, subsequently, …

A Study Of Chemical Stabilization Of The Swell Properties Of Putman Soil, Dale E. Dobson

Masters Theses

"The theory of chemical stabilization of a swelling clay was reviewed. The effect of several chemicals on the engineering properties of Putnam soil was investigated using the Atterberg tests. Strength of concentration of chemical additives versus preferred structural orientation of treated Putnam was investigated using sedimentation procedures similar to those used in the hydrometer analysis of fine grained soil sizes. Swell tests were conducted under a static load of 1.25 psi on untreated Putnam, Putnam in combination with sodium carbonate, and Putnam treated with calcium hydroxide. These tests were conducted at varying initial moisture contents and dry densities.

It was …

The Electrochemical Degradation Of Alkyl Benzene Sulfonate., Melvin David Rickard

Masters Theses

"The ever increasing use of nonbiodegradable synthetic detergents, mainly the alkyl benzene sulfonates, has created difficulties in water and wastewater treatment, and in stream pollution. Although considerable attention has been given to this problem, no solution has been developed which can be effectively employed in the abatement of detergent pollution.

The purpose of this investigation was to determine the feasibility of the use of direct current electrochemical degradation in the removal of alkyl benzene sulfonates (ABS) from water. The rate and degree of completion of the electrochemical reactions were determined, and the nature of the end products formed was investigated. …

Composite Beams In Building Constructions., Mahendrasinhji M. Jhala

Masters Theses

"The use of composite beams is very common in bridge and. in building construction due to the fact that a savings in material is effected.

The study herein shows a simplified procedure for design of composite beams. A number of design charts for rapid selection of a wide-flange section and the necessary cover plates are presented herein. These charts are based on economic sections of steel beams when used in a simple span, if one knows the approximate depth of the beam, slab thickness, allowable stresses in the steel and concrete and live load moment, it is very easy to …

Commentary On The 1962 Edition, George Winter

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

No abstract provided.

Specification For The Design Of Light Gage Cold-Formed Steel Structural Members, American Iron And Steel Institute

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

No abstract provided.

Circular Arch Analysis, Aylmer Pao-Sheng Cheng

Masters Theses

"This work presents an analysis of a two-hinged circular arch by both the elastic theory and the deflection theory. The basic assumption made in this analysis was that the moment of inertia of the arch rib and the normal force vary as the secant of the angle with respect to the crown. The increase of maximum moment as found by the deflection theory was in the range of 30%"--Abstract, page 2.

The Effect Of A Continuous Low Temperature On The Operation Of Waste Stabilization Lagoons, Ralston Kennedy Dennis

Masters Theses

"This study was undertaken to determine the effect of a continuous low temperature on the operation of a waste stabilization lagoon and to provide information of value to the sewage treatment field.

The investigation was conducted using two experimental lagoons subjected to a continuous illumination of 550 to 600 foot candles emitted by two fluorescent light fixtures. Of these units, the Cold Room Lagoon was maintained at a controlled temperature of 5° C. and the Warm Room Lagoon was operated at room temperature in the range of 16 to 32° C.

Dissolved oxygen and biochemical oxygen demand determinations were the …

The Application Of Preaeration Of Sewage To The Design And Operation Of Waste Stabilization Lagoons, Richard G. Huber

Masters Theses

"The application of preaeration of sewage on the operation and design of waste stabilization lagoons was investigated and its effect on the permissible BOD loadings was determined to provide original and basic information of value to the sewage treatment field.

The investigation was conducted using two 15 gallon aquariums, one of which was designated as the Control Lagoon and the other as the Test Lagoon. These experimental lagoons were subjected to 12 hour diurnal light and dark cycles, provided by means of fluorescent light fixtures.

Raw sewage and aerated raw sewage were fed daily to the Control and Test Lagoons, …

Model Analysis By The Moiré Method, David D. Kick

Masters Theses

"This study presents the use of Moiré fringes for model analysis of deflections and strains. Deflection of a beam, strain in a disk, and an Influence diagram for a frame are presented as examples of uses of the Moiré method. The necessary equations for the determination of strain using the Moiré method are also derived and presented in this work"--Abstract, page v.

Gathering Haunch Design Data By Photoelasticity, Richard B. Heagler

Masters Theses

"The haunching of beams and columns and the haunching of rigid frames is performed by design engineers for the purpose of relieving stress concentrations that might occur at discontinuities in structures. The haunch performs this relieving of stress concentration by increasing the rigidity of the structure at regions of high stress. Usually this design step is one of trial and error; that is, the engineer will select a haunch or method of haunching and then check to see if the result is sufficient for his purpose. This can be a time consuming process and can lead to uneconomical design.

In …

Effect Of The Mixed Liquor Suspended Solids Concentration On The Treatment Of Dairy Wastes By Activated Sludge Process, Meredith Hambleton Saxer

Masters Theses

"The effect of the mixed liquor suspended solids concentration on the treatment of dairy wastes by the activated sludge process was investigated to provide original and basic information of value to the waste water treatment field.

The studies were conducted using a continuous flow activated sludge laboratory unit. Two different synthetic dairy waste systems were used in this investigation, the 0.05 Percent Skim Milk Waste System and the 0.1 Percent Skim Milk Waste System. These wastes provided BOD loadings of 43.9 and 91.1 lb. BOD per day per 1000 cu. ft., respectively, at the 12 hour detention period employed. Mixed …

A Study Of The Electro-Chemical Injection Of Ca(Oh)₂ Into Pure Kaolin Clay, Sam Michael Savas Jr.

Masters Theses

"The work presented in this thesis is the investigation and study of a possible and successful means of injecting an electrolyte solution into a fine grain soil mass with the use of electric current and to measure some of the changes of its physical properties. A NoKarb Georgia Kaolin Clay was treated by passing a preferential electrolyte solution of Ca(OH)₂ using direct current for a period of one and six days. The tests performed during this investigation included the following: (a) tri-axial tests, (b) atterberg limits, (c) pH determination, (d) moisture content change (from treatment), (e) visual settling of treated …

Investigation Of Flow Rates Through A Rockfill Dam With An Internal Spillway, Jerry R. Bayless

Masters Theses

"Tests were performed on a model of a rockfill dam with an internal spillway for the purpose of developing a method of predicting the flow rate through the dam. The flow rate depends upon the head but is affected by the rock size and the height of the impervious core; there- fore, these factors were varied in the study. A relation for flow rate in terms of head was found for each combination of rock size and core height used and was compared to the general weir equation to find the coefficient of contraction; thus the effect of changing core …

Study Of The Design Of Reinforcement For Prestressed Concrete And Blocks, Charles Robert Hoffman

Masters Theses

"This thesis is an analysis of the transverse tensile stress condition in an end block of a prestressed concrete beam. A stress analysis was made by photoelasticity and compared to the mathematical solutions and experimental solutions performed by others on concrete models. The photoelastic model was made from a piece of Columbia Resin, 39.

Whatever method is chosen to determine the stress condition, there is no exact code that can be established to fit the various type problems which arise"--Abstract, page 1.

A Study Of Small Watersheds Within The State Of Missouri, Terence E. Harbaugh

Masters Theses

"The present status of data from watersheds in the under 10 square mile drainage area classification, pages much to be desired. However, this study of 45 small watersheds within the State of Missouri gives an indication that surface runoff from these basins may be predicted with a fair degree of accuracy. The inclusion of a shape factor AL² and its use as a portion of the "basin index" (AL²S^1/2) gives accurate results as a predictor of the "mean annual flood". The mean annual flood may be adequately computed by the formula, MAF = 113(AL^{2 …}

Shear Stress Distribution In Haunched Beam Models, Manyu K. Mehta

Masters Theses

"The purpose of this thesis has been to give the distribution of shear stress inside a haunch. A haunch is generally provided to relieve high stress concentrations at the face of the column. However the nature of shear stress distribution inside the haunch is not known.

This stress distribution was determined from a photo- elastic study on a CR-39 model. It is noted that the haunch reduces the stress concentration at the face of the column but at the same time somewhere near the point where the haunch meets the beam there is a high stress concentration.

Shear stress changes …

Velocity Distribution Induced By Free Jet Impact On A Stilling Basin, Sedat Özkol

Masters Theses

"At present, the use of the free jet impacting on a stilling basin as an energy dissipator is not very common, as there is very little information available concerning this particular field. However, if conditions are favorable, this type of energy dissipator will be quite economical to construct.

In this paper it was found that the hydraulic behavior of the free jet impacting on a stilling basin can be determined to a degree which may be considered accurate for practical purposes. It was also shown that given the free jet velocity, the magnitudes of the velocities at the critical points …

A Comparison Of Backwater Profile Computation, Alwin Chang Hsin Young

Masters Theses

"Bakhmeteff's, Von Seggern's, and the Standard Step methods were chosen for a comparative study of backwater profile determinations made with the assistance of a digital computer. This study concentrated on the M-l type of curves for different kind of prismatic channels; i.e. rectangular, trapezoidal, and parabolic channels. From the results obtained by each method for different channels, the consistency between the several methods and their applicability to all shapes of channel had been studied. Also the effect of the number of reaches used in flow profile determinations, the effect of the use of an average value of (1-ß), hydraulic exponents …

Analysis Of Flat Plates By Reaction Distribution Method, David D. W. Yang

Masters Theses

"This study was made to analyze rectangular flat plates by the method of Reaction Distribution and to compare results obtained by this method with that of other methods. The basic approach is to divide the plate into an equivalent grid system and introduce temporary supports at the intersecting joints. The results from this study shows that the Reaction Distribution method is useful in a qualitative analysis of the behavior in a plate but is less satisfactory in obtaining reliable quantitative results"--Abstract, page 2.

A Study Of Composite Beams Made To Find An Approximate Relationship Between The Top And Bottom Flange Steel Ratio, Murli U. Hasrajani

Masters Theses

"At present in building construction the use of the composite beams is not very common. The use of the concrete beams is seen in almost all construction. By using composite beams in building construction more durability and savings in cost could be achieved. This paper shows an approximate design procedure which could be followed without running a number of trials with different sections to arrive at the required one. The ratio of top flange steel to the bottom flange steel can be determined if one knows the loads, span and the depth of the beam required"--Abstract, page i.