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Articles 61 - 68 of 68
Full-Text Articles in Civil Engineering
Field Permeability Determination Of Partially Saturated Fine Grained Soil, Edward G. Rapp
Field Permeability Determination Of Partially Saturated Fine Grained Soil, Edward G. Rapp
Masters Theses
"The determination of water permeability through a soil is necessary to estimate seepage losses from small reservoirs. At the present time, the methods available to conduct this determination in partially saturated fine grained soils are expensive and in most cases not commensurate with the cost or importance of the individual structure. This investigation was conducted to evaluate the use of a proposed, potentially inexpensive field procedure in this situation. A modified borehole apparatus was utilized in field tests to determine the permeability of a partially saturated soil deposit in place. Undisturbed samples from the same location were tested in the …
Epoxy Resin Admixture For Concrete, Kuo-Chu Hu
Epoxy Resin Admixture For Concrete, Kuo-Chu Hu
Masters Theses
"This thesis describes laboratory tests on concrete having epoxy as an admixture. Cylinders for compression and elastic modulus tests were cured under two different curing conditions, standard laboratory cure and a simulated job cure. Beams cured under laboratory conditions were tested for flexural strength. Test results show the compressive strength increases with an increase of epoxy content for job curing conditions. However, compressive and flexural strengths of specimens cured under laboratory conditions show a slight decrease. The elastic modulus of concrete containing epoxy also decreases in comparison to ordinary concrete"--Abstract, page ii.
The Prediction Of Mix Design Properties For Dense Graded Bituminous Mixtures, Robert Ernest Weeks
The Prediction Of Mix Design Properties For Dense Graded Bituminous Mixtures, Robert Ernest Weeks
Masters Theses
"The purpose of this investigation was to ascertain the feasibility of interpolating values of the physical properties of a dense graded bituminous mix between known values. Also the effects of limestone mineral filler on the properties of a dense graded mix are evaluated. The variables in this study were mineral filler and asphalt cement. Control mixes were established at 2, 6 and 10 percent mineral filler and experimental mixes were prepared at 4 and 8 percent filler. The aggregate consisted of limestone and was mixed with an asphalt cement of 85-100 grade penetration. Al mixes were tested by the Marshall …
Effect Of Single Stirrups On Reinforced Concrete Beams, Vinodbhai T. Patel
Effect Of Single Stirrups On Reinforced Concrete Beams, Vinodbhai T. Patel
Masters Theses
"This study was made to determine the location of vertical stirrups and also to determine the amount of stirrup-steel required to prevent diagonal cracking. The study is limited to rectangular, simply supported, reinforced concrete beams subjected to a concentrated point load at the center of the span. Five sets, each containing three beams were tested. Two sets were cast without stirrups and the results were used to locate the stirrups for the remaining tests. The other three sets were cast with one stirrup on either side of the central load. Stirrups were of the "U" type and formed form No. …
Effect Of Calcium Lignosulfonate On Properties Of Concrete At Early Ages, Lawrence Kong-Pu Wang
Effect Of Calcium Lignosulfonate On Properties Of Concrete At Early Ages, Lawrence Kong-Pu Wang
Masters Theses
"The objective of this investigation was to determine the effects of calcium lignosulfonate on the physical properties of concrete. Calcium lignosulfonate used as an admixture was tested for its effect on the tensile and compressive strength of plain concrete cylinders, and for its effect on the flexural strength of plain concrete beams. The effect of the admixture on shrinkage, slump, air content and unit weight was also studied. the test results showed that calcium lignosulfonate reduces the amount of water required to make a workable concrete mix; a more workable mix saves money because it is easier to place, thus …
Discharge Characteristics Of Side Weirs, Edgar Snowden
Discharge Characteristics Of Side Weirs, Edgar Snowden
Masters Theses
"The purpose of this study is to investigate the division of flow of water in a flume of rectangular cross-section when the flume is provided with a side weir. An equation has been derived so that the quantity of water flowing over the side weir compared to the quantity of water flowing in the main channel can be predicted. This ratio is acceptable only within the ranges of heads, velocities, and weir lengths imposed by the geometry of the system tested"--Abstract, page ii.
The Effect Of Nickel On Activated Sludge, James Robert Matthews
The Effect Of Nickel On Activated Sludge, James Robert Matthews
Masters Theses
"The primary objective of this investigation was to determine the effect of nickel on activated sludge over a comprehensive range of concentrations and to evaluate the ability of the sludge to acclimate and become more tolerant to the metal. Six one-liter fill and draw activated sludge units were fed domestic sewage; five of these units also received constant, increasing, and shock doses of nickel while the sixth was maintained as a control. Treatment efficiency was evaluated in terms of the chemical oxygen demand, suspended solids, and nickel content of the effluent. A Warburg respirometer was also employed and was operated …
The Effect Of Cadmium On Anaerobic Digestion, Lyle Lynn Pruitt
The Effect Of Cadmium On Anaerobic Digestion, Lyle Lynn Pruitt
Masters Theses
"The main purpose of this study was to determine the effect of cadmium on anaerobic digestion. Metal concentrations in the form of regular and slug doses were considered. The possibility of acclimating anaerobic bacteria to higher cadmium levels was studied, and attempts were made to reestablish digestive action through re-seeding in digesters overcome by high cadmium concentrations"--Abstract, page [ii].