Civil Engineering Commons^™

How To Lower The Cost Of Housing?, Lynn Hannley

International Symposia on Low Cost Housing Problems

No abstract provided.

Labor-Requirement And -Cost Comparison Of Construction Methods For Lower-Cost Housing, Schlomo Peer

International Symposia on Low Cost Housing Problems

No abstract provided.

Housing Functions: Shelter And Environment, Michael J. Burrill

International Symposia on Low Cost Housing Problems

No abstract provided.

Efficiency Of Planning Of Housing Systems, P. Purushothaman, Jawalker K. Sridhar Rao, K. S. Mathur

International Symposia on Low Cost Housing Problems

No abstract provided.

Some Innovate Housing Units, Sidney Shore, Jack R. Vinson

International Symposia on Low Cost Housing Problems

No abstract provided.

Author Index, University Of Missouri--Rolla

International Symposia on Low Cost Housing Problems

No abstract provided.

Table Of Contents, University Of Missouri--Rolla

International Symposia on Low Cost Housing Problems

No abstract provided.

High Speed Magnetically Supported Vehicles For Reducing Transportation's Degradations Of The Environment, Pravinchandra Shukla

Masters Theses

"The development of new techniques for higher speed transportation is desirable to satisfy the environmental, conservation, and economic requirements of society. Some of the important factors are presented for developing magnetically supported vehicles. A new method for improving the ratio of lift force to drag force is suggested and discussed. An application of the new technique to vehicles that would ride on a carpet of magnetism and would operate with less waste of energy is suggested "--Abstract, page ii.

Laboratory Studies Using Diffused Oxygen And Air For Hypolimnion Reaeration, Chin-Ming Pai

Masters Theses

"The purposes of this research were to study the oxygen transfer rates and the oxygen transfer efficiencies of different types of aerators using different sources of oxygen in different types of water bodies, and to evaluate the number of diffusers required to be installed in a selected lake for hypolimnion aeration.

The experiments were conducted using a specially designed column. Four types of aerators, including a cylindrical stone diffuser, a spherical stone diffuser, and 2 ceramic diffusers (types A and B) which differed in pore size, were utilized as the aerators. The water bodies selected for the studies were Rolla …

Effect Of Glass Aggregates Upon Abrasiveness Of Asphaltic Mixtures, Dwarka Prasad Gupta

Masters Theses

"The utilization of glass as an aggregate in asphaltic concrete pavements has been suggested as a means for reusing the increasing amounts of waste glass generated each year in the United States. Recent studies have shown that asphaltic mixtures containing glass aggregates can be designed to meet Marshall requirements for stability, flow and void content but the abrasiveness of mixtures containing glass aggregates had not been investigated. The objectives of this study were to develop a laboratory wear testing apparatus and compare the abrasiveness of asphaltic concrete mixtures using glass aggregates with the abrasiveness of mixtures using several different conventional …

A Study Of Right Turn On Red At Signalized Intersections, Ronald Duane Rains

Masters Theses

"Traffic engineers have discussed the controversial subject of allowing drivers to make a right-turn-on-red (R.T.O.R.) for many years. There have been many strong points given for and against allowing this movement.

Within this paper R.T.O.R. is discussed and conclusions are drawn for a research of literature and questionnaire survey.

Questionnaires were sent to ninety-three cities and all fifty states. Many valuable unwritten facts and opinions were received from the seventy city and thirty-six state traffic engineers that completed and returned the questionnaires.

It was determined that 63.8% of the states replying and 64.3% of the cities are presently utilizing R.T.O.R. …

The Structural Behavior Of Cold-Formed Steel Members With Perforated Elements, Charles S. Davis

Doctoral Dissertations

"Analytical and experimental investigations have been conducted to study the influence of perforations on the structural behavior of cold-formed steel structural members. Since in many cases, the load-carrying capacity of cold-formed steel members depends on the buckling behavior of individual component elements, emphasis has been concentrated on the study of the instability and post-buckling strength of perforated elements. In this investigation, the buckling loads and post-buckling strength of stiffened and unstiffened compression elements having single circular and square holes have been studied analytically by using the finite element method. The effects of different holes on the buckling coefficient have been …

Computer Assisted Teaching Of Steel Design, Wendelin Henry Mueller Iii

Doctoral Dissertations

"A method for use in creating a university level course is presented. The specifics of each of the steps is given in general terms to allow its application to as many different topics as possible. This method is then specifically applied in the formation of a fundamental steel design course using the American Institute of Steel Construction Specification. The reasoning utilized in each phase of development is documented. A lecture style presentation complemented by a series of student oriented computer programs was chosen for use. The details of the course material in outline form is given along with the computer …

Thermal Stresses And Movements In Bridges, Joseph Charles Reynolds

Masters Theses

"A state of the art regarding the thermal behavior of bridges and considerations to be given to the resultant thermal effects is presented. The results of studies related to the thermal effects on bridges are reviewed. Studies attempting to relate environmental factors to bridge temperatures, and subsequently to bridge movements and stresses, indicate that the task is extremely complex. Some correlation has been made between equations predicting bridge temperatures and movements based on weather bureau records. However, further research is needed to evaluate the effects of factors other than temperature, such as creep, shrinkage, and humidity on bridge movements and …

Effect Of Biological Activity On Pesticide Desorption, Loh-Tien Chiang

Masters Theses

"The purpose of this research study was to investigate the effect of biological activities on the desorption of pesticides from humic acid solids. The pesticides selected in this study are dieldrin and heptachlor, both of which have been commonly used in agricultural applications. The humic acid adsorbent was extracted from a coal-like substance called "leonardite", which has a humus content of as high as 53 percent by weight. The first step of this study involved a proper cultivation of biological culture so that the culture could be adapted to a test environment containing a high concentration of humic acids. The …

Use Of Glass Separated From Municipal Refuse In Asphaltic Concrete, Thomas Eugene Keith

Masters Theses

"The recent interest in municipal refuse recycling has brought about the development of several systems for separation of the refuse into components. One of the components reclaimed is a glass-rich fraction which, although primarily glass, contains various non-glass materials which the system is not able to remove. Clean waste glass can be used as an asphaltic concrete aggregate, and it would be desirable to use this glass-rich fraction in a similar manner. However, the effect, if any, of the non-glass components on the properties of an asphaltic mixture must be determined in order to utilize the glass-rich fraction with a …

Adsorption And Desorption Of Chlorinated Hydrocarbon Pesticides By Organic Humic Sludge, Fu-Sheng Chien

Masters Theses

"This research study was undertaken to investigate the fundamental sorption and desorption of selected organic pesticides by organic humic acids under laboratory-controlled conditions. Emphasis was placed on the evaluation of both the rate and the equilibrium of adsorption and desorption. Two types of chlorinated hydrocarbon pesticides were employed in this study. These are dieldrin and heptachlor, both of which are commonly used in today's agricultural applications. The adsorbent of organic humic acids was extracted from a coal-like substance called "leonardite," which has a humus content as high as 53 percent by weight. The experimental work of this study was conducted …

A Study On The Lateral Placement Of Automobiles Due To Restrictions On Two-Lane Rural Highways, Warren Chip Woods

Masters Theses

"The driver of an isolated vehicle on a given section of highway, whether it is urban or rural, will choose a path on the pavement that offers the least resistance to driver effort and which to him seems safest. Lateral obstructions, such as retaining walls, trees, bridge abutments, ect., which may cause him to deviate from the desired path represent some degree of hazard to the driver and should be removed, if practicle. The purpose of this investigation was to determine any change in the lateral placement of automobiles due to side restrictions on rural two-way, two-lane highways. Phase one …

Structural Test And Analysis Of A Vierendeel Steel And Concrete Composite Girder, Melvin Crews Oestreich

Masters Theses

"The results of the structural load testing of a unique type of steel and concrete composite girder are described. The structural system, referred to as a composite Vierendeel girder, is a hybrid type which incorporates features of a castellated beam and a Vierendeel truss. The performance of the composite girder agreed reasonably well with calculated values based on section properties for a prismatic beam. Observations indicated web stiffeners were required on the stub beams to prevent premature failure of the system. Failure of the girder was due to concrete crushing over a stub web beam. Design considerations for a structural …

Fitting Discrete Probabilistic Frequency Distributions To Disturbed Traffic Flow At An Unsignalized Urban Intersection, Horst Walter Kaminsky

Masters Theses

"Traffic variables, such as volume, speed, gaps and lags, and headways can be described by probability distributions. In this study vehicle arrivals from three directions have been recorded at a four-leg, right-angled, at-grade intersection in Rolla, Missouri, and statistically analyzed. Two distinct probabilistic statistical concepts were used, the continuous (gap) and discrete (counting) distribution. The negative exponential distribution is discussed briefly, whereas the applicability of discrete statistical models for the traffic situation selected is elaborated in detail.

The purpose of this research was to investigate the impairment and distortion that various interferences such as upstream traffic lights, bottlenecks or other …

Development Of A Sampling System And Characterization Of Stormwater Runoff From A Small Urban Area, William Clark Ford

Masters Theses

"Increasing urbanization and the demand for high quality water have directed attention to the problem of combined sewer overflows, while recent research has demonstrated that stormwater alone, without the influence of sanitary sewage, carries a significant pollutional load. The purpose of this investigation was to determine the quality and pollutional contribution of stormwater runoff from a small urban area, with specific emphasis on the development of a suitable sampling and flow recording system, the characterization of runoff and the correlation of runoff quality with local environmental factors and storm characteristics. The system developed consisted of an automatic sampler capable of …

Proceedings Of The 2nd International Symposium On Lower-Cost Housing Problems, Oktay Ural

International Symposia on Low Cost Housing Problems

To protect and improve the total human environment is a major concern of all the nations of the world. This is well noted in the recent activities of the United Nations. The provision of decent homes for every family of our world is an integral part of the human environment. It is this belief which generated the initial interest for the planning of the International Symposia on Lower-Cost Housing Problems.

The purpose of the Second International Symposium is many sided: to generate concern on the housing problems around the world as they exist today; to gather people who share mutual …

Probabilistic Models For Construction Estimating And Bidding, James E. Spooner

Doctoral Dissertations

"Two probabilistic models are offered as a means for quantitatively determining contingency in a lump-sum bid. The first model is based on the isolated project and requires subjective evaluation of probabilities associated with the individual elements of the estimate. Contingency is defined as a function of the standard deviation of project field costs. Procedures are developed to obtain the variance of the total field cost from three-value estimates of the primary quantities. The second model considers the business as a stochastic process with an initial risk reserve and a positive risk loading, and contingency in this model is a function …

Characterization And Staged Lagoon Treatment Of Swine Feedlot Waste, Abraham H. Loudermilk Jr.

Masters Theses

"Feedlot pollution is developing into a serious problem because of the trend toward intensive farming techniques and the increasing number of animals in confinement feeding operations. The purpose of this study was to characterize swine waste collected under a slotted feeding floor using a water-carriage system, and to evaluate the treatment of this waste in a staged lagoon system consisting of an anaerobic, a dual anaerobic-aerobic, and an aerobic lagoon. A small feeding floor unit capable of maintaining 3 separate groups of animals, and a pilot 3-lagoon system were designed, constructed, and operated for a period of approximately 4 months. …

The Artificial Sedimentation Of Soil, John Richard Wagner

Masters Theses

"Previous investigations concerned with artificially sedimented soils and a review of the literature on soil structure are summarized. These studies show that many of the physical properties of a soil depend upon its structure and that the structure of a sedimented soil depends principally upon the salt content of the pore water. In addition, artificially sedimented soils have been shown to have a "natural" soil structure. An apparatus was developed which will automatically sediment soils in water of controlled salt content. To determine whether or not the apparatus was able to sediment uniform and homogeneous soil samples, moisture content determinations, …

Transient Hydraulic Simulation: Breached Earth Dams, D. L. Fread

Doctoral Dissertations

"A conceptual method to alleviate flood damages due to over-topping failures of small earthfill dams is the incorporation of a relatively thin erosion retarding layer within the dam. This paper investigates the reduction in the reservoir release due to the hypothetical erosion retarding layer. In addition, the paper provides a method for the determination of an optimal location of the layer so as to minimize the maximum possible reservoir release due to a gradually breached earth dam. The transient reservoir flow is simulated by a numerical model, based upon the solution of the one-dimensional St. Venant unsteady open-channel flow equations. …

Thickening And Dewatering Characteristics Of Activated Sludge Containing Metal-Precipitated Phosphorus, Lyle Wayne Merritt

Masters Theses

"The purpose of this research study was to investigate methods for the disposal of activated sludge containing metal-precipitated phosphorus. To accomplish this objective, chemically-treated activated sludge or a mixture of the secondary sludge with primary sludge were thickened and dewatered by vacuum filtration and centrifugation. The putrescibility of the dewatered secondary sludge was also evaluated, and since anaerobic digestion is the usual method of sludge treatment, a digestion study was conducted. Secondary sludge for these studies was produced in five 38-gpd (144-1/day) activated sludge pilot plants operated at the Rolla Southeast Treatment Plant. Ferric chloride and alum were added directly …

Some Factors Affecting The Results In Cyclic Triaxial Tests, Suresh Kumar Chaudhary

Masters Theses

"A major cause of damage to structures and earth embankments during earthquakes or any other such dynamic vibrating loading conditions has been the liquefaction of saturated sands. There have been several investigations to establish a convenient and relatively simple laboratory test procedure and to study the nature of field conditions leading to sand liquefaction. This investigation evaluates the effects of sample size, testing frequency, and the method of sample preparation on the number of cycles to cause initial liquefaction in pulsating triaxial tests using standardized equipment and test procedures. It has been found that sample size does affect test results …

Comparing Community Resources To Industrial Needs With Application To Daviess County, Missouri, Jay Eldon Waggoner Jr.

Masters Theses

"A method of matching industries with communities, the modified Miller-Weiss Indugram, is developed. The technique compares the environmental needs of industry with the environmental resources of a community. The comparison is based upon twenty-five environmental factors. Application of the technique is made to Daviess County, Missouri. Results indicate those industries which are best suited for this rural area"--Abstract, page ii.

The Influence Of Temperature, Carbon Content, And Preloading On Secondary Consolidation Of A Clay, Richard Kai-Ming So

Masters Theses

"The effect of temperature, organic carbon content, and preloading on secondary consolidation of Bryce clay has been studied. A straight line plot of void ratio versus logarithm of time was established in secondary consolidation for long term loading periods up to one month. Temperature changes within the range of 5ºC. to 45ºC. were studied in the secondary consolidation phase at different stress levels and different carbon contents of the soil. Secondary consolidation in a preloading cycle at a stress level of 2 tsf unloaded to 1 tsf and reloaded to 2 tsf was studied. The preloading tests were at temperatures …