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2021/07/20clayey sand producer in ethiopia
Characterization of Sand Production for Clayey-Silt Sediments ...
2022/12/20 Summary. In our previous work (Jin et al. 2021), an experimental effort has been made to microscopically observe sand failure, migration within a matrix,
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The dynamics between soil erosion, nutrient variability, land use ...
2024/3/4 Ethiopia heavily depends on agriculture for 43.2% of its gross domestic product, more than 80% of export revenue employing 85% of the labor force. To meet
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Full article: Examining the viability and benefits of
2024/3/18 Earth-based construction materials have shown the potential to significantly reduce production energy by 80-90%, scaling efficiency alongside production volume. ... suitable for rammed-earth
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(PDF) Industrial properties and uses of silica sand from
2023/3/14 Geochemically, the studied silica sand deposit is characterized by the abundance of SiO2 (96.65%) with lesser quantity of Al2O3 (1.35%), Fe2O3 (0.85%), TiO2 (0.13%), and minor content CaO,
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Characterization of Sand Production for Clayey-Silt Sediments ...
2022/5/1 To deal with sand-production problems systematically, a sand-production control system (SCS) is first proposed in this paper, specialized for pore-distributed
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Investigating the Impact of Varying Sand Content on the Physical ...
2023/12/7 Expansive clayey soils often pose challenges for construction projects due to their low bearing capacity, swelling, and shrinkage properties. While previous research
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Evaluation of Sodium Silicate and its Combination with Cement
Clayey sand with gravel was treated with 3%, 5% and 7% cement, 1%, 2.5% and 6% liquid sodium silicate and the respective combinations of the additives by dry weight of the soil.
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Effect of clay type and content on the mechanical properties of
2023/1/1 Clayey silt hydrate sediment samples exhibit strain hardening behavior accompanied by shear shrinkage. ... sand production and wellbore plugging, and
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Stabilization of Clayey Soil Using Waste Foundry Sand and
2021/3/2 The optimum water content of the clayey soil was 16.8%, and maximum dry density was 1.70 g/cc. The WFS and molasses were blended with clayey soil alone and
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Hydrate formation and dissociation characteristics in clayey silt ...
2022/4/1 Compared with silt sediments, clayey silt with a water content of 28.71% has a high water absorption capacity owing to the presence of clay particles. Meanwhile, silt particles can be cemented by clay particles. Therefore, there was no apparent water or sand production in the clayey silt sediments. In other words, there is no pipeline blockage.
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Description, characterization and classification of the major
1Ethiopian Agricultural Transformation Agency, Ethiopia. 2Ethiopian Institute of Agricultural Research, Ethiopia. 3Jinka Agricultural Research Center, Ethiopia. Received 8 April 2015; Accepted 6 June 2015 The soils of Jinka in Southern Ethiopia were studied based on the detail works on soil pit description,
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Sustainability Free Full-Text Effect of Different Land
2022/1/25 Land-use changes under poor management practices are among the major causes of decline in soil fertility and agricultural productivity in south-central Ethiopia. Therefore, the study of soil
获取价格Characterization of Sand Production for Clayey-Silt Sediments ...
2021/7/1 Jingsheng Lu et al. developed a set of sand production and sand control test systems that can be used to analyze the sand production and sand control in the hydrate mining process, which has ...
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Characterization of Sand Production for Clayey-Silt Sediments ...
2021/12/15 Summary. As one of the geotechnical risks, sanding has been one of the main constraints for safely and sustainably developing marine natural gas hydrate. In this study, a cylindrical vessel that is packed with the clayey-silt sediment collected from the Shenhu area of the northern South China Sea is used to microscopically observe sand
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Ethiopia’s Mining Industry and Business Opportunities
2020/7/1 In the year 2008 Ethiopia was ranked the 9th producer of gold in Africa, accounted for 4% globally and 5th largest from Africa for tantalum production. Ethiopia has earned US$618 million from mineral exports in the year 2011 and 2012 with the intent to increase this revenue to US$1.5 billion by the year 2024.
获取价格Characterization of Sand Production for Clayey-Silt Sediments ...
2022/12/20 Summary. In our previous work (Jin et al. 2021), an experimental effort has been made to microscopically observe sand failure, migration within a matrix, invasion toward gravel-packing zones, and production conditioned to the openhole gravel packing, while three sanding patterns (i.e., fractures, wormholes, and fluidized channels) have
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Investigating the Impact of Varying Sand Content on the Physical ...
2023/12/7 Expansive clayey soils often pose challenges for construction projects due to their low bearing capacity, swelling, and shrinkage properties. While previous research has explored additives to enhance these soils’ properties, the potential of sand remains underexplored. This study investigates the impact of varying sand percentages on
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Chemical and Mineralogical Characterisation of Clayey Sands from
2023/10/31 In Ivory Coast, particularly in the south, most paved and unpaved roads are made of clayey sand, given its availability. The early degradation of roads is related to a strong sensitivity of certain materials to the environment (climate, geology, and degrees of alteration) and a poor knowledge of the geotechnical properties could slow down their
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A DEM-based approach for modeling the evolution process of
2019/6/19 In this paper, a predictive model for simulating temporal behaviors of clayey sand during seepage-induced erosion has been developed by coupling discrete element method (DEM) with computational fluid dynamics (CFD). In this model, the particle–fluid coupling simulation is solved by a “fixed coarse-grid” scheme in 3D particle
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Effect of clay type and content on the mechanical properties of clayey
2023/1/1 Clayey silt hydrate sediment samples exhibit strain hardening behavior accompanied by shear shrinkage. ... These results are valuable for production well siting assessment in clayey silt hydrate reservoir and provide requisite theoretical basis for ... illite clay, and quartz sand (Li et al., 2018). The weight proportion of silt is 70%, and ...
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Geotechnical and slope stability analysis in the ... - ScienceDirect
2024/3/1 Ethiopia is divided into five separate climate zones. The term 'Wirch' refers to areas above 3300 m sea level, with average annual temperatures below 10 °C. ... it was determined that sandy soils predominantly covered the area, with sand content ranging from 27.9 % to 95.47 %. In slope section two, silt soils were dominant, with silt content ...
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Integrated Characterization of Sand Production for Clayey
2022/9/26 Abstract. In this work, a robust and pragmatic technique is developed to characterize the sediment deformation and sand production for clayey-silt sediments in the absence and presence of hydrate by coupling reservoir simulation and geomechanics. Such an integrated model considers the pressure gradient-based (PGB) sand failure criterion,
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Compressional behavior of clayey sand and transition fines content ...
2007/2/6 The index parameters of sand and kaolinite clay shown in Table 2 were determined by means of sieve, hydrometer, specific gravity, and consistency limit tests. These tests were performed in accordance with ASTM standards (ASTM, 1999) except the liquid limit test, which was conducted using the fall cone method of British Standards (BS
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Effect of clay type and content on the mechanical properties of clayey
2023/1/1 Clayey silt hydrate sediment samples exhibit strain hardening behavior accompanied by shear shrinkage. ... These results are valuable for production well siting assessment in clayey silt hydrate reservoir and provide requisite theoretical basis for ... illite clay, and quartz sand (Li et al., 2018). The weight proportion of silt is 70%, and ...
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Geotechnical and slope stability analysis in the ... - ScienceDirect
2024/3/1 Ethiopia is divided into five separate climate zones. The term 'Wirch' refers to areas above 3300 m sea level, with average annual temperatures below 10 °C. ... it was determined that sandy soils predominantly covered the area, with sand content ranging from 27.9 % to 95.47 %. In slope section two, silt soils were dominant, with silt content ...
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Integrated Characterization of Sand Production for Clayey
2022/9/26 Abstract. In this work, a robust and pragmatic technique is developed to characterize the sediment deformation and sand production for clayey-silt sediments in the absence and presence of hydrate by coupling reservoir simulation and geomechanics. Such an integrated model considers the pressure gradient-based (PGB) sand failure criterion,
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Compressional behavior of clayey sand and transition fines content ...
2007/2/6 The index parameters of sand and kaolinite clay shown in Table 2 were determined by means of sieve, hydrometer, specific gravity, and consistency limit tests. These tests were performed in accordance with ASTM standards (ASTM, 1999) except the liquid limit test, which was conducted using the fall cone method of British Standards (BS
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Land Suitability Characterization for Crop and Fruit
clay; light = sand, loamy sand. Internal drainage: hydro = hydromorphy. CEC = cation-exchange capacity. Ploughing: no problems = ploughing is possible at any time of the year; limited = not possible during wet periods, clayey soils; severe =
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Frontiers Evaluation of engineering properties of clayey sand bio ...
2023/8/9 Additionally, clayey sand soil can exhibit poor cohesion due to the dominance of sand particles. With less cohesive properties, clayey sand soil may be more prone to erosion, especially when exposed to flowing water or heavy rainfall (Gu et al., 2019). Erosion can undermine the stability of slopes, embankments, and other earthworks.
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Compressional behavior of clayey sand and transition fines
2007/2/6 The results indicate that a sand content of more than 30 % is recommended for achieving desired properties in expansive clayey soil. This is a result of sand taking the dominant role in the soil mixture, which lowers soil suction and improves soil properties by reducing swelling, permeability, and compressibility.
获取价格A laboratory investigation of the geomechanical properties
2021/12/2 This study aimed to determine the effect of graphite additive on the strength parameters of clayey sand. Compaction, unconfined compression strength, shear strength, and permeability tests on clayey sand samples were conducted under non-stabilized and stabilized conditions containing varying amounts of graphite. The results
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Geotechnics Free Full-Text A Review of Sand–Clay Mixture and
Natural soils are usually heterogeneous and characterized with complex microstructures. Sand–clay mixtures are often used as simplified soils to investigate the mechanical properties of soils with various compositions (from clayey to sandy soils) in the laboratory. Performing laboratory tests on a sand–clay mixture with definite clay fraction can provide
获取价格Micro- and nano- bentonite to improve the strength of
sand sample. ˙e standard compaction test of the clayey sand sample shows that the compaction curve increases to 2.02 g/cm 3 dry unit weight at 7.5% water content. e optimum water content of ...
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Characterization of laterite soil and its use in construction ...
2022/12/1 The chemical analysis of laterite soil samples sourced from literature, Table 1 showed that the major compounds present in the laterite soil are SiO 2, Al 2 O 3, and Fe 2 O 3.These compounds were predominantly more than 70% of total composition of oxide compounds, and in some cases, it reached about 92±5% (Jan et al., 2007; Marto
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SOIL ERODIBILITY AND SOIL SUSCEPTIBILITY TO EROSION
clay, clay loam and clayey soil (Figure 2). In the soil erodibility equation, M was estimated based on the percentage values of silt, sand and clay [%silt (silty clay) plus %fine sand (sandy clay) multiplied by quantity (100 minus %clay (clay loam and clayey soil]. The soil erodibility value
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(PDF) Characteristics of Nitisol profiles as affected by land use
2017/8/23 The mean sand (28%) and silt (26%) particles in the intensive cereal system were significantly (p < 0.05) higher compared to 15% sand and 18% silt in the agroforestry system.
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Aquifer characterization and groundwater flow dynamics in
2020/6/26 The complex nature of the Ethiopian aquifer requires detail, characterization, and analysis. Consequently, characterization of groundwater flow and major aquifer systems was conducted in the upper left bank of the Jemma River catchment in the Blue Nile Basin. The research area covered 1255 km2. The main objective of the
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