Civil and Environmental Engineering Commons^™

Laboratory Investigations On Latex-Modified Concrete, Sidney Diamond, Qizhong Sheng

JTRP Technical Reports

No abstract provided.

Engineering Soils Map Of Adams County, Indiana, Arvind Chaturvedi

JTRP Technical Reports

No abstract provided.

Irish Building Services News

Building Services Engineering

No abstract provided.

Time Characteristics Of Small Watersheds In Response To The Probable Maximum Precipitation, Brian Jay Swenty

Doctoral Dissertations

"The EPA Storm Water Management Model (SWMM) was used to perform single event simulations of Probable Maximum Precipitation (PMP) level rainfall events on the Loss Lake watershed in southcentral Missouri. Overland flow was simulated using kinematic wave routing and channel flow was simulated using dynamic wave routing.

Lag time was defined as the time between the centroid of the excess rainfall hyetograph and the centroid of the direct runoff hydrograph.

Rainfall depth, rainfall duration, and the distribution of rainfall intensity were found to be significant predictor variables for lag time. Defined as hydrologic parameters for this study, channel flow roughness, …

The Development Of Optimal Strategies For Maintenance, Rehabilitation, And Replacement Of Highway Bridges: Volume 2 - A System For Bridge Structural Condition Assessment, Ah Beng Tee, Mark D. Bowman, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

The Development Of Optimal Strategies For Maintenance, Rehabilitation, And Replacement Of Highway Bridges: Volume 4 - Cost Analysis : Executive Summary And Final Report, Mitsuru Saito, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Speed Trends On Indiana Rural Interstate Highways: Traffic Research Report, David L. Cochran

JTRP Technical Reports

No abstract provided.

The Development Of Optimal Strategies For Maintenance, Rehabilitation, And Replacement Of Highway Bridges: Volume 5 - Priority Ranking Method : Executive Summary And Final Report, Mitsuru Saito, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

An Evaluation Of Leading Versus Lagging Left Turn Signal Phasing, Joseph E. Hummer, Robert E. Montgomery, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Adsorption Of Organic Compounds By Microbial Biomass, Ariamalar Selvakumar

Dissertations

The adsorption of hazardous organic compounds such as phenol, 2-chlorophenol, 2-nitrophenol, chlorobenzene, and ethylbenzene onto two types of inactive microbial biomass (activated sludge and nitrifying bacteria) was studied. The adsorption isotherms could be expressed by the Freundlich adsorption isotherm and were found to be nearly linear over the range of concentrations (50 - 200 mg/1) studied. Desorption studies showed that the adsorption process was partially reversible. Heat of sorption was estimated and indicate that the biosorption process involves a physical rather than a chemical mechanism. The adsorptive capacity of biomass is about two to three orders of magnitude less than …

Behavior Of Ductile Materials Under Impulsive Loading, M. Y. Brunner

Tanzania Journal of Engineering and Technology (TJET)

Ductile materials under dynamic loading are known to be able to absorb energy and thereby delay or even prevent structural failure. This paper is concerned with such behaviour in the case of impulsive loads of short duration. It is shown that even when the feared, unstable, labile condition is attained, failure may not necessarily occur. This behaviour is particularly impressive for structures with large mass, because it is essentially the mass which slows down the attainment of the failure strains. If the impulsive load dies away quickly enough, the constant plastic resistance will be adequate to bring the increasing deformations …

Decontamination Of Contaminated Clay Soils By Thermal Treatment, Chandrakanthi Weerasinghe

Theses

An experimental investigation on the desorption of contaminated clay soils by thermal treatment was performed. This study was carried out on two clay soils (kaolinite and bentonite) sorbed with three liquid organic compounds (phenol, chlorophenol, and chlorobenzene). The study consists of two different phases, the adsorption and desorption. The results on batch equilibrium adsorption were correlated with different isotherm models of which the Freundlich isotherm model was found to be best fit in predicting adsorption capacities of kaolinite, and that for bentonite was found to be the linear isotherm model.

A thermal desorption study followed the equilibrium adsorption study. A …

The Evaluation Of The Impact Of Reducing The Domestic Wastewater Phosphorus On The Algal-Related Water Quality Of The Hudson/Raritan Estuary And Northern New Jersey's Coastal Waters, Ron Gautreau

Theses

An investigation was undertaken to examine the planktonic algal-related water quality of the Hudson/Raritan Estuary and northern New Jersey's coastal waters with respect to quantifying the relationship between the amount of phosphorus loading to the planktonic algal-related water quality responses. Recreational and commercial uses of northern New Jersey's coastal waters have at times been impaired by excessive growth of planktonic algae. Using population equivalents and export coefficients the amount of domestic wastewater and land runoff derived phosphoruscontributed to the Estuary was estimated. The P load contributed to the Estuary via the discharge of New York and New Jersey domestic wastewater …

Unsaturated Column Studies Of Silty Sand Using A Conservative Tracer, Canagasabapathy Nallianathan

Theses

A laboratory study was conducted to investigate the flow and mass transport of a conservative tracer in the unsaturated phase. For this purpose, a relatively "large-scale" cylindrical column(12 in. O.D. x 4 feet long) was fabricated and equipped with tensiometer and psychrometer sensors.

The soil used in the study was a New Jersey based silty sand compacted to an average dry density of 93 lb/ft³. The soil was permeated with a 0.5 M NaCl solution infiltrated at the top of the column using a perforated spiral tube assembly. The permeant was applied at a constant rate of approximately …

Co-Metabolism Of Pentachlorophenol With Glucose Using Two-Stage Anaerobic Activated Carbon Fluidized Beds, Zen Wang

Theses

Abstract - Detoxification of pentachlorophenol by using a two-stage anaerobic biological activated carbon fluidized bed has been investigated. Glucose was introduced as a cosubstrate to determine the relationship between the glucose/PCP ratio and the extent of PCP detoxification in such a system. This system has been proved to be effective in the removal of both PCP and COD. Ratio of glucose to PCP predominates the performance of the system throughout the whole course of this experiment. At a glucose/PCP ratio of 0.33, the system has a highest reduction of both PCP and COD. Addition of glucose to the highly PCP …

Irish Building Services News

Building Services Engineering

No abstract provided.

Irish Building Services News

Building Services Engineering

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

Development Of A Rock Model Testing Capability At The New Jersey Institute Of Technology And Testing Of Plane Stress Models Possessing A Central Circular Opening With A Nearby Horizontal Discontinuity, David R. Good

Theses

This thesis had three main objectives. They were to develop a rock model testing capability at N.J.I.T. by (1) developing and building a load testing frame for rock models, including all necessary appurtenances and load measuring devices, (2) developing a rock modelling material and quantifying its properties, and (3) applying the capabilities described in items 1 and 2.

A high capacity load test frame was constructed from structural steel members. Heavy screw rams were utilized to apply load and specially constructed proving rings were employed to accurately measure load. Additionally, load platens and other support equipment were constructed.

The model …

Effect Of Fabric On Stress-Strain Relation, Volume Change, And Dynamic Shear Modulus Of Ottawa Sand, Ming-Tarng Chen

Civil & Environmental Engineering Theses & Dissertations

To evaluate the effect of fabric on stress-strain behavior, volume change, and the dynamic shear modulus of Ottawa sand, four series of tests on hollow cylindrical specimens were performed by a torsional simple shear/resonant apparatus. All specimens were first isotropically consolidated, and then sheared along the different stress paths while keeping the mean effective stress constant. The test results showed that depositional fabric had a slight influence on the stress-strain behavior, and one half-cycle of pre-shearing created a clear anisotropy on the stress-strain response. The intermediate principal stress had a dominant effect on volume change characteristics but it might not …

Optimal Allocation Of Water Among Industries In Dar Es Salaam City, Tanzania, J. I. Matondo

Tanzania Journal of Engineering and Technology (TJET)

Dar es Salaam is the city with the largest number of industries in Tanzania. However, the water demand for these industries is more than the supply. Therefore, there is a water use competing problem among the industries. Dynamic programming technique has been applied to optimally allocate the available water among the industries with the objective of maximizing the net benefits. Results reveal that, industries with the highest net return per unit of water will get the first priority of being allocated water.

Estimation Of In-Situ Compression Index Of Contaminated Clays Using The Electrical Method, Prasanna Ratnaweera

Theses

For contaminated clay soils, it has been found that current testing methods to determine compressibility characteristics do not truly identify the physico-chemiral interaction present in the soil-pore fluid-electrolyte system. Most methods are virtually impracticable due to various reasons such as evaporation of pore-fluid, difficulty of handling toxic chemicals, etc. Also, destructive test methods may not maintain in-situ conditions while testing.

The electrical properties of soils, the dielectric dispersion in particular is considered to represent the amount of physico-chemical interaction present in the soil-pore fluid-electrolyte system. For uncontaminated soils, correlations between the dielectric dispersion and the slope of the isotropic consolidation …

Study Of The Structure And Capacity Of Construction Industry In Pakistan, Tayyab A. Ansari

Theses

The construction industry is the second largest sector in Pakistan's economy after agriculture. It is a fragmented industry which includes very small and very large contracting groups. It includes professional groups such as architects, engineers, management personnel etc. Major part of this industry is dominated by material's suppliers, vendors etc.

In the light of the developments which have taken place particularly over the last ten years, the study has covered the capacity of the construction industry in terms of estimated output, availability of manpower, demand and production of building materials , financial problems, credit, quality of work, the role of …

Sorption Characteristics And Their Effects On Geotechnical Properties Of Clay Soils, Arambawattage Mahendra Rodrigo

Theses

An experimental investigation on the sorption characteristics of clay soils with liquid organics (phenol, chlorophenol, nitrophenol and chlorobenzene) and their effects upon geotechnical properties was undertaken. The investigation consisted of two different phases, namely, (1) the sorption/ desorption study, including kinetic rate, equilibrium time, isotherm modeling, and (2) geotechnical properties due to clay/ liquid organic interactions. The results of kinetic rate study indicate that the equilibration time for the contaminants way dependent upon the hydrophobic or the hydrophelic nature of the chemical. For equilibrium adsorption models, the linear isotherm was found to be the best fit in predicting sorption capacities …

Estimation Of Modified Proctor Densities Based On Visual Identification, Ramesh Damodaram

Theses

Often in construction jobs requiring controlled compaction, there is a delay involved in testing the soil sample to be used as a structural fill. Here a rational approach has been adopted to get these values from 600 test data available. Using these data, appropriate relationships between grain sizes, maximum dry densities and optimum moisture content were developed. From these, two tables were derived to estimate the maximum dry density and optimum moisture content based on grain size distribution.

In a fill control job, if the borrow pit happens to change, the field personnel could obtain soil samples and send them …

Expert Systems Approach For Means Of Egress Analysis, Dimitrios N. Dontas

Theses

The use of Expert Systems has grown dramatically during the 1980's. Developed as a branch of Artificial intelligence, knowledge based Expert Systems were at first of academic interest only. With successful application of knowledge based Expert Systems to medical and other diagnostic problems, industrial and commercial use of this technique is also increasing significantly. As of 1986, fifty percent of the Fortune 500 companies are embarked in their own Expert Systems research.

A variety of knowledge based Expert Systems has been developed for the Civil Engineering design and construction industries. The applications cover a wide range of subjects, including among …

Determination Of Project Duration For Resource Constrained Projects Without Using Resource Scheduling Procedure, Rabindra Nath Karmakar

Theses

The problem addressed in this thesis is that of determining the practicability of equating measures of network and resource characteristics to the early finish date of a project which is constrained by resources. The output of standard critical path calculations along with information on resource profiles that are easy to calculate can be of use in estimating resource constrained project duration.

Twenty two different equations ( developed by Hall) were used to find the estimated project finish dates. These results were compared to the schedule resulting from the application of the heuristic rule of minimum activity float. It is shown …

Sorptive And Geotechnical Characteristics Of Kaolinite, Chi-Yuan Shih

Theses

The sorption/desorption behavior of phenol and chlorobenzene as well as their influence on geotechnical characteristics of kaolinite were studied. The results reveal that the sorption process follows closely with the Freundlich adsorption isotherm whereas the sorption/desorption ratio depends upon the characteristics of organic compounds.

A series of geotechnical properties tests was also undertaken after achieving equilibrium at different concentrations of organic compounds. It was found that the parameters such as liquid limit, plastic limit, optimum moisture content, and dry density increase with an increasing-concentration of organic compounds.

The relationship between the geotechnical, properties and sorption behavior of soils provides the …

Softening Response Of Concrete In Direct Tension, Teresa Cintora

Theses

Due to the increased attention in nonlinear fracture mechanics and numerical methods of cementitious material, it has become necessary to have a reliable investigation of the post-peak softening response of concrete under direct uniaxial loading. But due to the brittleness of the material previous researchers have encountered great difficulty in obtaining complete data regarding the load-deformation behavior. This study uses a strain-controlled testing method and therefore the post-peak curve can be more easily obtained. Based on these results a unique formula for the normalized load vs. deformation curve has been proposed to be applied in fracture analysis applications.

Friedman's Model Of Calculating The Optimum Bid Price Using Dbase Iii Plus, Selim Uzel

Theses

The micro-computer program, BIDCALC presented in this thesis is offered as simple, practical, and proven approach to developing an effective data-based competitive bidding strategy. BIDCALC is written in dBASE III Plus programming language for MS-DOS based computers.

Main purpose of the program is to evaluate the optimum bid using the Friedman's model of Maximizing the Expected Profit. At the same time the program keeps track of necessary competitor and project information in data base files which are easily transferable to other software packages. The program is capable of generating a variety of reports in a matter of seconds.

BIDCALC is …