Download or read book The Effect of Freeze and Thaw Cycles on Soils Compacted to Ultimate Density written by Ralph O. Hill and published by . This book was released on 1948 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of a Freeze thaw Cycle on the Dry Bulk Density of a Soil written by Robert George Cessford and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this investigation was to examine one aspect of the compaction problem, viz. the effect of a freeze-thaw cycle on the bulk density of a soil. Moisture content, temperature (freezing rate) and initial density were parameters considered in the project. A moisture-density meter was designed and built for the purpose of measuring bulk density and moisture content non-destructively. Analysis of variance and multiple regression techniques were used to analyze the data. The following results and conclusions were obtained: 1. Non-destructive measurement of soil bulk density and moisture content was achieved using a dual energy gamma transmission technique. 2. Significant density changes were caused by an interaction of the parameters temperature x initial density. 3. Density changes due to the levels of the factors considered in the experiment were small, indicating little loosening of compacted soil during a freeze-thaw cycle. 4. Prediction of density responses in the field would not be possible on the basis of results obtained in this experiment.
Download or read book The Effects of Freeze thaw Cycles on the Permeability of Three Compacted Soils written by Steven McClelland and published by . This book was released on 1992 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Freeze thaw Cycles on the Hydraulic Conductivity of Compacted Glacial Till Soils written by Sridhar Dulipeta Rama and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Freeze Thaw Cycles on the Permeability of Three Compacted Soils written by JJ. Bowders and published by . This book was released on 1994 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three soils: a processed kaolinite, a pulverized shale used as a liner material, and a residual clay soil used as a liner material were compacted using the standard Proctor method and permeated with distilled, deionized water in flexible-wall permeameters. Specimens were subjected to freezing and thawing in an environmental chamber. After being thawed the specimens were again permeated in the flexible-wall permeameters. The freeze/thaw process increased the permeability in all three soils. The kaolinite and residual clay soil showed increases in permeability ranging from one to two orders of magnitude above the pre-freeze/thaw values. The permeability of the pulverized shale increased by less than a factor of three. Post-freeze/thaw permeation at progressively higher effective confining stresses reversed the increase in permeability and resulted in decreasing the permeability from the post-freeze/thaw values. This reduction in permeability was greatest for the kaolinite and the residual clay (one to two orders of magnitude); it was the least for the pulverized shale (maximum of a factor of about two). The results of this study indicated that the magnitude of the change in permeability of specimens subjected to freeze/thaw increased with increasing plasticity of the soils. These findings are in agreement with previous literature that freezing and thawing do increase the permeability of a soil but that the increase can be reduced when effective stress on the soil is increased.
Download or read book Effect of Freeze thaw and Wet dry Cycles on Compacted Soil Barriers written by Monica Williams (M.E.Sc.) and published by . This book was released on 2004 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Freeze thaw on the Structure and Hydraulic Conductivity of Compacted Clays written by Majdi Ahmad Othman and published by . This book was released on 1992 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction written by Jodi DeJong-Hughes and published by . This book was released on 2001 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency of freeze thaw cycles bulk density and saturation effects on soil surface shear and aggregate stability in resisting water erosion written by S. N. Asare and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Behavior on Freezing with and Without Additives written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper 1: Results obtained from freezing experiments on soil systems at various porosities are described. Paper 2: Studies in permafrost areas show that a particle-size sorting occurs in saturated granular soils due to freeze-thaw cycling. This phenomenon is evidenced by a gradual change in size of soil grains, with the fines at the bottom of the active layer and the coarse at the surface.
Download or read book The Effect of Freezing and Thawing on Soil Moisture Bulk Density and Shear Strength Under Open and Forest Conditions written by Arthur William Krumbach and published by . This book was released on 1960 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Freeze thaw Cycles on Soil Respiration and Nitrogen Dynamics as In fluenced by Soil Structure Aggregate Size and Water Content written by Bangwei Zhang and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of soil structure and aggregation in influencing soil respiration and N dynamics in soils undergoing freeze-thaw cycles, as influenced by water content, is poorly known. Surface soil with a texture of sandy loam was collected from an agriculture field in Atlantic Canada. Two studies were undertaken. The first study determined the influence of soil structure (whole / crushed soil) and water content (35%, 60%, and 85% water-filled pore space) on soil respiration and nitrogen dynamics during freezing and thawing of the soil. The second study determined the role of different aggregate size fractions (0~0.25, 0.25~4, and 4~8 mm) on the freeze-thaw effect. The research found microbial metabolism is more limited by environmental conditions than by the substrate availability. Crushing altered structural characteristics and caused changes in substrate solubilization and / or microbial utilization of substrates during freezing and thawing. Furthermore, freezing and thawing did not influence the denitrification of the whole soil, but enhanced denitrification in soils where aggregates were crushed. At 60% WFPS, the interaction among aggregate crushing and freeze-thaw increased denitrification. Also, the impact of freeze-thaw was greater on soil respiration and N mineralization in medium size aggregates (0.25~4mm). Freezing and thawing improved de-nitrification in aggregates on all three size fractions. This project provided new information on the effects of freeze-thaw on soil carbon and nitrogen dynamics as influenced by soil structure and water content. This information will be critical in assessing the impact of climate change in soil carbon and nitrogen dynamics in temperate regions.
Download or read book Proceedings written by and published by . This book was released on 1949 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Snow Litter and Soil Compaction on the Soil Frost Regime in a Minnesota Oak Stand written by David B. Thorud and published by . This book was released on 1964 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Water Content Variation and Freeze thaw Cycles on the Resilient Modulus of a Silty Highway Subgrade Soil written by Robert Leck Stephens and published by . This book was released on 1980 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Freeze thaw Cycling on Stress strain Characteristics and Volume Change of Topsoil till Mixtures written by R. W. Culley and published by . This book was released on 1973 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Compaction and Stabilization written by Army Library (U.S.) and published by . This book was released on 1956 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
