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Wojciech Sas, Andrzej Głuchowski and Jarosław Margielski

Abstract

Estimation of physical and mechanical properties of cohesive soil stabilized by hydratized lime addition. Process of chemical stabilization of cohesive soils influences its mechanical properties, also in the case of soil cohesion. Road constructions consist of few layers which have various mechanical properties and this creates the need for better understanding the impact of chemical stabilization on soil as a layer of road. For the purposes of this article, tests were carried out in order to establish physical and mechanical properties, especially the penetrating resistance CBR test. The main aim of this paper was to estimate the cohesion of the soil, which was sandy-silty clay stabilized with hydrated lime

Open access

Dariusz Wojtasik

References KRZYWOSZ Z., WOJTASIK D. 2001: Methodology of testing the permeability normal to the plane of nonwoven geotextiles. Ann.Warsaw Univ. of Life Sci. - SGGW, Land Reclam. No 31, 57-64. ROLLIN A.L. 1986: Filtration opening size of Geotextiles. ASTM Standardization News, 50-52. Yeo, K.C. 2008: Properties of geotextiles. Castco Testing Centre Limited, Hong Kong (www.hkpc.org/hkiemat/mastec03_notes/27.pdf) http://www.hkpc.org/hkiemat/mastec03_notes/27.pdf

Open access

Małgorzata Majder-łopatka, Wiesław Szulc, Beata Rutkowska, Dominik Ptasiński and Witold Kazberuk

Abstract

The aim of the research was to determine whether, and to what extent, a surface fire of forest areas determines changes in physical and chemical properties of the soil. The test material consisted of soil samples taken from soil profiles exposed in a burnt-out area and in an area unaffected by fire. The samples were analyzed for total organic carbon and total nitrogen contents, and also selected indicators of soil acidification. As a result of the tests, it was found that there was a decrease in the levels of organic carbon (by over 75%) and nitrogen (by 50%). A negative effect of the changes was the narrowing of the C/N ratio, a positive one – an increase in soil pH (from 3.14 to 4.67), and a several-times reduction in hydrolytic and exchangeable acidity.

Open access

Andrea Kałuża-Haładyn, Elżbieta Jamroz and Jakub Bekier

REFERENCES Agnew J.M., Leonard J.J., 2003. The physical properties of compost. Compost Science and Utilization 11(3): 238–264. Beffa T., Blanc M., Marilley L., Frischer J.L., Lyon F., Arago M., 1996. Taxonomic and Metabolic Microbial Diversity During Composting. [In:] The Science of Composting (red.) Bertoldi M., Sequi P., Lemmes B., Papi T. Blackie Academic & Proffesional, London, Glasgow, Wienheim, New York, Tokyo, Melbourne, Madras: 149–161. Bekier J., Drozd J., Jamroz E., Jarosz B., Kocowicz A., Walenczak K., Weber J., 2014. Changes in

Open access

Katarzyna Gabryś and Alojzy Szymański

The analysis of consolidation in organic soils

This paper is devoted to the specific difficulties connected to construction on problematic soils. Different type of structures like: road embankments, flood control levees, dykes and dams are often located in soft subsoil areas, which consists mainly of peat, calcareous soil with a very high content of calcium carbonate and other high plasticity organic and no organic soils. These soils can be characterized as highly deformable with low initial shear strength and an insufficient bearing capacity. Soft soils show a large deformation, both vertically and horizontally, under load. The settlements often appear very quickly and can also continue for a long time. The consolidation process consists here of two main stages: primary settlement and secondary (and tertiary) settlement (creep). It is essential to have a good quality description of physical and mechanical properties of soil before the calculation and construction stage. For calculations of each stage of settlement the different physical and mechanical parameters of problematic soil are applied. In this paper the analysis of organic soils deformation process is presented. The deformation characteristics were defined on the basis of laboratory tests results. Soil investigations were performed on peat samples taken from test site located in Olsztyn region. Laboratory test of physical properties and consolidation tests in oedometer were carried out. Based on laboratory test results the empirical relationships between stress and deformation as well as stress and time were elaborated in order to describe the primary consolidation in organic soils.

Open access

Jolanta Kwiatkowska-Malina, Anna Bielska and Andrzej Szymon Borkowski

–1316. Usowicz B., Marczewski W., Łukowski M.I., Lipiec J., Usowicz J.B., 2011. Assessment of soil moisture from ground measurements and satellite data in ESA SMOS mission, conference materials of the 28 th Congress of the Polish Soil Science Society. Soil-Human-Environment: 5–50 (in Polish). Usowicz B., Hajnos M., Sokołowska Z., Józefaciuk G., Bowanko G., Kossowski J., 2004. Spatial variability of physical and chemical soil properties at a scale of a field and commune. Acta Agrofizyka, Rozprawy i monografie: 103 pp. (in Polish). Vasu D., Singh S.K., Sahu N

Open access

Edyta Malinowska

References HEAD K.H. 1982: Manual of Soil Laboratory Testing, Vol. 3. LAMBE T.W., WHITMAN R.V. 1969: Soil Mechanics . Wiley Book Company. MESRI G., GODLEWSKI P.M. 1977: Timeand stress-compressibility interrelationship. Journal of Geotechnical Engineering , ASCE 103(5), 417-430. SAS W., SZYMAŃSKI A., MALINOWSKA E., NIESIOŁOWSKA A. 2010: Physical and mechanical properties of problematic soils in Poland. Proceedings of the XIVth Danube-European Conference on Geotechnical Engineering

Open access

Haider Al-Ani, Erwin Oh and Gary Chai

Abstract

The subsoil conditions of Surfers Paradise in Southeast Queensland of Australia have been examined in terms of soil stiffness by using geographic information system (GIS). Peat is a highly organic and compressible material. Surfers Paradise (as a study area) has problematic peat layer due to its high water content, high compressibility, and low shear strength. This layer has various thicknesses at different locations ranging between R.L. . 10 to R.L. -19.6 m. Buildings in Surfers Paradise are using piled foundations to avoid the high compressibility and low shear strength peat layer. Spatial Analyst extension in the GIS ArcMap10 has been utilised to develop zonation maps for different depths in the study area. Each depth has been interpolated as a surface to create Standard Penetration Test SPT-N value GIS-based zonation maps for each depth. In addition, 8 interpolation techniques have been examined to evaluate which technique gives better representation for the Standard Penetration Test (SPT) data. Inverse Distance weighing (IDW) method in Spatial Analyst extension gives better representation for the utilised data with certain parameters. Two different cross sections have been performed in the core of the study area to determine the extent and the depth of the peat layer underneath already erected buildings. Physical and engineering properties of the Surfers Paradise peat have been obtained and showed that this peat falls within the category of tropical peat.

Open access

Edyta E. Malinowska and Alojzy Szymański

: Experience of consolidation process from test areas with and without vertical drains. Elsevier Geo-Engineering Book Series 3, 3–49. KODA E., SZYMAŃSKI A. 1990: Prediction of settlement of an embankment subsoil with vertical drains. Annals of Warsaw Agricultural University – SGGW. Land Reclamation 25, 3–12. KODA E. SZYMAŃSKI A., WOLSKI W. 1993: Field and laboratory experience with the use of strip drains in organic soils. Canadian Geotechnical Journal 30 (2), 308–318. MALINOWSKA E.E. 2011: Flow-pump technique as a constant velocity method of flow

Open access

Jolanta Kwiatkowska-Malina and Alina Maciejewska

Abstract

Organic matter takes part in all soil processes and influences the physical, chemical and biological properties of soil. The paper presents the analysis of heavy metal contents (Zn, Pb, Cd) in soil and biomass of darnel multifloral (Lolium multiflorum Lam.) cultivated at diverse conditions of soil reaction and organic matter content. A brown coal preparation (Rekulter) was applied as the source of organic matter in autumn 1999 to the studied soil, which was contaminated with cadmium, lead and zinc. The limiting influence of Rekulter on the uptake of heavy metals by darnel multifloral (two cuts of the test plant) was the highest in the case when the largest dose was applied to soil with the highest pH (about 6.0). Bioaccumulation indexes (BI) for Cd, Pb, Zn indicate the mobility and bioavailability of Cd, Pb and Zn in soils. The BI for particular heavy metals were generally low, with the lowest in the case when the largest dose of Rekulter was applied to all cuts of the test plant