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Articoli di riviste sul tema "Grain size and Economical sand"

Autore: Grafiati

Pubblicato: 7 giugno 2025

Ultima modifica: 2 agosto 2025

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1

Md., Ramjan Ali, Ikramul Hoque Md., Akter Jhumana, and Kawsarul Islam Kabbo Md. "The Use of Various Sand in Foundation Engineering: Performance and Cost Comparison in Context of Bangladesh." Research and Review: Journal of Structural and Building Construction 1, no. 2 (2025): 1–13. https://doi.org/10.5281/zenodo.15385869.

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<em>Sand pile technology is a method of ground improvement extensively used throughout Bangladesh to strengthen poor ground to achieve sufficient bearing capacity and minimize the settlement of foundations. One of the key advantages of the sand pile system is that it can be implemented to all forms of soil observed in Bangladesh, from sandy to clayey soils, and it has consequently been utilized as a liquefaction preventive measure. But the performance of the sandpile relies not only on the density of the soil, the space between piles but also on the size of the grain of the sand employed. This

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Kim, Hyun Dong, Shin-ichi Aoki, Nobuhisa Kobayashi, and Susumu Onaka. "THE EFFECTIVE METHOD OF BEACH NOURISHMENT PLACEMENT." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 66. http://dx.doi.org/10.9753/icce.v36.sediment.66.

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When erosion occurs, sandy beach cannot maintain the sufficient sand width and the foreshore slope becomes steeper by the frequent erosion effect. As a result, the beach is trapped in a vicious circle of becoming vulnerable by the incident waves. In order to repair or protect the erosive beach, beach nourishment can be used as a countermeasure while minimizing the environmental impacts. However, beach nourishment is not a permanent solution and requires periodic renourishment after several years. To alleviate such problem, minimizing the period of renourishment must be an economical alternativ

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Duszyński, Remigiusz, Angelika Duszyńska, and Stefan Cantré. "New Experiences in Dike Construction with Soil-Ash Composites and Fine-Grained Dredged Materials." Studia Geotechnica et Mechanica 39, no. 4 (2017): 17–24. http://dx.doi.org/10.1515/sgem-2017-0033.

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Abstract The supporting structure inside a coastal dike is often made of dredged non-uniform sand with good compaction properties. Due to the shortage of natural construction material for both coastal and river dikes and the surplus of different processed materials, new experiments were made with sand-ash mixtures and fine-grained dredged materials to replace both dike core and dike cover materials resulting in economical, environmentally friendly and sustainable dikes. Ash from EC Gdańsk and dredged sand from the Vistula river were mixed to form an engineering material used for dike construct

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Oliveira, Igor Rafael Buttignol de, Alan Rodrigo Sorce, Marcos Vinicius Vieira Gaglieri, Fabia Castro Cassanjes, and Sylma Carvalho Maestrelli. "Influence of the addition of glass from long neck bottles in the properties of the reactive powder concrete." Research, Society and Development 11, no. 13 (2022): e519111335853. http://dx.doi.org/10.33448/rsd-v11i13.35853.

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This work presents an economical, technical, and environmentally correct solution for the disposal of long neck bottles (which cannot be bottled more than once), by replacing fine aggregates (sand) with residue of ground glass from long neck bottles in the production of reactive powder concrete (RCP). Using a reference formulation for RCP containing natural sand, this raw material was replaced in 12.5, 25, 50, 75 and 100 wt.% by glass residues, evaluating the physical and mechanical properties in the specimens at the ages of 7, 14, and 28 days. The ground glass was characterized by X-ray Fluor

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Hussain, Mazhar, Hafida Zmamou, Antony Provost, et al. "Stabilization and Recycling of Sand in Pedestrian Walkways." Buildings 14, no. 1 (2024): 205. http://dx.doi.org/10.3390/buildings14010205.

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The production of construction and demolition waste (CDW) in urban areas is growing rapidly. While the storage and disposal of CDW waste is costly, its recovery can help to conserve natural resources. This study investigates the characteristics of recycled sand obtained from the processing of CDW waste and the possibility of its reuse for pedestrian pathways. Physico-chemical and mineralogical characteristics of the recycled sand were investigated for its reuse. The percentage of fine particles in sand (below 0.63 μm) is 2.8%. The grain size of sand fulfills the particle size requirement of Fr

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Irvani, Irvani, and Elsha Delvi Artasari. "Studi Karakteristik Tailing Pada Lokasi Eks Penambangan Timah di Bukit Sambung Giri Kecamatan Merawang Kabupaten Bangka." PROMINE 6, no. 2 (2018): 31–36. http://dx.doi.org/10.33019/promine.v6i2.1086.

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Tailing deposits at ex-tin mining area in Bangka and Belitung Island has a large number of economical residual minerals. This study is to identify tailing characteristic and its potential mineralogy and elements based on shallow hand boring (Auger) samples, along stream line in west part of Sambung Giri Hill. Every coordinate sample plotted on base map. Loboratory analisys using Strereo Mikroscope for identify minerals characteristics, and geochemical analysis using XRF for identification the presence of elements. The tailing deposits has laterally grain size grad

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Norsham, Nur Fatinhanani Fatimah, and Istikamah Subuki. "Synthetization and Characterization of Yttria Stabilized Zirconia Powder from Amang Zircon Sand." Journal of Advanced Research in Micro and Nano Engineering 28, no. 1 (2024): 105–17. https://doi.org/10.37934/armne.28.1.105117.

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Zirconia is widely used in industry as it exhibits high strength and amazing properties. However, pure zirconia powder is often unstable to be used in high temperature applications due to phase transformation that will lead to fracture and crack. Hence, zirconia is doped with yttrium oxide in order to enhance zirconium content and stability as it helps to hinder the phase transformation of zirconia. Locally available Amang zircon sand from tin tailing industry in Malaysia can be an economical alternative to synthesize zirconia due to the high zirconium content. Sadly, the study on utilizing Am

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Polivanov, Helena, Antonio Carlos Jacome de Castro, Franklin Dos Santos Antunes, and Luiz Cláudio de Araújo Camara. "Estudo de um perfil podzólico e de brunizem da zona oeste do estado do Rio de Janeiro." Anuário do Instituto de Geociências 13 (December 1, 1990): 17–29. http://dx.doi.org/10.11137/1990_0_17-29.

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This work describes the study of two types of soil profiles , podzolic and brunizem . The profiles are localized at Avenida Brasil near the Cabritos viaduct in the city of Rio de Janeiro . Chemical analyses, pH values, sulfuric digestion (SiO2, Al2O3,Fe2O3, TiO2, K2O, Na2O), X-ray diffraction of the clay and silt fractions, mineralogical analyses of sand under the microscope , physical measurements of the Atterberg limits, grain size analyses and specific gravity of solids, were undertaken. The analysed soils have values of the Atterberg limits coherent with the grain size and mineralogy, and

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Fattahpour, Vahidoddin, Mahdi Moosavi, and Mahdi Mehranpour. "An experimental investigation on the effect of grain size on oil-well sand production." Petroleum Science 9, no. 3 (2012): 343–53. http://dx.doi.org/10.1007/s12182-012-0218-5.

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Kastornykh, L. I., A. V. Kaklyugin, M. G. Kholodnyak, and D. V. Kuzmenko. "Investigation of the Factors Influencing the Effectiveness of Fine-Grained Self-Compacting Concrete with Crushed Concrete Sand." Modern Trends in Construction, Urban and Territorial Planning 4, no. 2 (2025): 57–66. https://doi.org/10.23947/2949-1835-2025-4-2-57-66.

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Introduction. The justified use of mineral raw materials from construction waste for the preparation of vibro-compacted concrete mixtures is economically beneficial and environmentally efficient, however, the effect of aggregates from scrap concrete on the rheological characteristics of fine-grained self-compacting mixtures and the structure of hardened concrete has not been sufficiently studied. The aim of this work is to study the factors influencing the effectiveness of fine–grained self-compacting concrete with crushed concrete sand.Materials and Methods. To determine the effectiveness of

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Bitan, Menashe, and Dov Zviely. "Sand Beach Nourishment: Experience from the Mediterranean Coast of Israel." Journal of Marine Science and Engineering 8, no. 4 (2020): 273. http://dx.doi.org/10.3390/jmse8040273.

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Beach nourishment along the Mediterranean coast of Israel represents a new approach to mitigate coastal erosion by adding suitable sand to threatened beaches. This ‘soft’ solution has become more environmentally and economically acceptable than traditional ‘hard’ solutions, such as seawalls, revetments, detached breakwaters and groins. Beach nourishment projects have been implemented on the Israeli coast north of Ashdod Port (2011), north of Ashkelon Marina (2015) and in the south of Haifa Bay (2016–2017). The performance of these projects was analyzed and compared with nourishment projects al

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Prieto-Espinoza, Maria, Bernd Susset, and Peter Grathwohl. "Long-Term Leaching Behavior of Organic and Inorganic Pollutants after Wet Processing of Solid Waste Materials." Materials 15, no. 3 (2022): 858. http://dx.doi.org/10.3390/ma15030858.

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The recycling of mineral materials is a sustainable and economical approach for reducing solid waste and saving primary resources. However, their reuse may pose potential risks of groundwater contamination, which may result from the leaching of organic and inorganic substances into water that percolates the solid waste. In this study, column leaching tests were used to investigate the short- and long-term leaching behavior of “salts”, “metals”, and organic pollutants such as PAHs and herbicides from different grain size fractions of construction & demolition waste (CDW) and railway ballast

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Cesar, Ricardo Gonçalves, Silvia Gonçalves Egler, Helena Polivanov, Zuleica Carmen Castilhos, Ana Paula de Castro Rodrigues, and Patricia Correa Araujo. "Biodisponibilidade de metilmercúrio, zinco e cobre em distintas frações granulométricas de solo contaminado utilizando oligoquetas da espécie Eisenia andrei." Anuário do Instituto de Geociências 31, no. 2 (2008): 33–41. http://dx.doi.org/10.11137/2008_2_33-41.

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The scientific community has been concerned about heavy metals contamination and their effects on human health and the environment. Rural areas of Descoberto municipality, southern Minas Gerais State, were submitted to gold extraction using rudimentary techniques of mineral processing. In 2002, local population detected metallic mercury presence on soil surface, and in 2005 Environmental Foundation of Minas Gerais State (FEAM) delimited a critical contamination area. This works proposes bioavailability assessment of mercury (Hg), zinc (Zn) and copper (Cu) in distinct grain sizes of a soil samp

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Balabuh, Yaroslav, Uliana Marushchak, and Volodymyr Bidos. "Design of roller compacted concrete composition." Bulletin of Kharkov National Automobile and Highway University 2, no. 92 (2021): 12. http://dx.doi.org/10.30977/bul.2219-5548.2021.92.2.12.

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Abstract. Problem. World experience shows that high operational performance of road coverings in the conditions of intensive traffic with high speeds of motor transport and sharp braking are provided by introduction of cement concrete. One of the effective solutions for the construction of high-quality, dura-ble, economical pavements is the use of roller-compacted concrete - a no slump concrete with low water-cement ratio, that is placed by an asphalt pav-er similar to asphalt pavement construction. The design of quality mixtures of roller-compacted con-crete is based on performance, construct

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Silva, Loreine Hermida da Silva e., Siglia Andressa Pinto Monteiro do Nascimento Alves, Fernanda Campante Magina, et al. "Cianobactérias Psâmicas Marinhas da Praia das Flexeiras, Estado do Rio de Janeiro, Sudeste do Brasil." Anuário do Instituto de Geociências 34, no. 1 (2011): 46–51. http://dx.doi.org/10.11137/2011_1_46-51.

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Flexeiras beach (22º56' S, 43º53'W) is located at Ilha de Itacuruçá (Itacuruçá Island) in Sepetiba Bay, on the southern coast of Rio de Janeiro State. It is a protected beach in relation to wave exposition, due to its geographic position, which faces the opening Bay. This work aims at contributing with the knowledge of abundance of psamic cyanobacteria species, which compound Brazilian sea-communities. It had occurred monthly collections, from December 2006 to January 2008, during syzygy's low tide. Samples were obtained through PVC pipes, measuring 1,5 cm of internal diameter and 6 cm length.

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Dewi, Alindya Eka Puspita, Zainul Hidayah, Akhmad Farid, and Dwi Budi Wiyanto. "Karakteristik dan Distribusi Spasial Bahan Organik Pada Sedimen Dasar Perairan Teluk Pacitan Jawa Timur." Journal of Marine and Aquatic Sciences 8, no. 2 (2023): 267. http://dx.doi.org/10.24843/jmas.2022.v08.i02.p11.

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Pacitan Bay is one of the semi-enclosed waters on East Java's south coast. This area is well-known for having a large fishing port as well as a beach tourism area. The dynamics of Pacitan Bay's waters due to the influence of currents, waves, and the input of water masses from the mainland are thought to affect the characteristics of the waters' bottom sediments. The objective of this study was to map the characteristics of bottom sediments and the distribution of organic substance. This research also analyzed the relationship between sediment characteristics and the concentration of organic su

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Barboza, Ana Carolina Lisbôa, Gerson Cardoso da Silva Jr, and Claudio Limeira Mello. "Caracterização de parâmetros hidráulicos em depósitos fluviais paleogênicos na Bacia de Volta Redonda, RJ." Anuário do Instituto de Geociências 30, no. 2 (2007): 118–32. http://dx.doi.org/10.11137/2007_2_118-132.

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The present study aims for the characterization of the hydrogeological parameters of the Paleogenic fluvial deposits of Volta Redonda Geological Basin, through hydraulic conductivity determinations and grain sized analyses. The overall goal was to produce a hydrogeological data base applicable to the characterization of hydrofacies (interconnected sedimentary bodies with distinct hydraulic properties) and the modeling groundwater flow. The used methods used consisted of in situ permeability determinations (Guelph permeameters) and laboratory tests (variable head permeameter), besides grain siz

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Gabryś, Katarzyna, Algirdas Radzevičius, Alojzy Szymański, and Raimondas Šadzevičius. "Shear Strength Characteristics of Recycled Concrete Aggregate and Recycled Tire Waste Mixtures from Monotonic Triaxial Tests." Materials 14, no. 23 (2021): 7400. http://dx.doi.org/10.3390/ma14237400.

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Recycled concrete aggregate (RCA) is a promising substitute for natural aggregates and the reuse of this material can benefit construction projects both economically and environmentally. RCA has received great attention in recent years in the form of aggregate as well as a geotechnical material of sand size. Next to RCA, another recycled material, which reduces the waste volume and is a part of the present challenges in civil engineering, is tire waste. Despite the good engineering properties of recycled tire waste (RTW), its use is still limited, even after almost 30 years since they were fir

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Putrawiyanta, I. Putu. "STUDI UKURAN BUTIR PASIR DI WILAYAH KERENG BANGKIRAI KOTA PALANGKA RAYA." JURNAL TEKNIK PERTAMBANGAN 23, no. 2 (2023): 25–33. http://dx.doi.org/10.36873/jtp.v23i2.10505.

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The morphological condition of Palangka Raya City which is dominated by a relatively flat area and part of it is a swamp area and flood runoff, causing a lot of accumulation of river sediments in the form of loose material such as sand and clay which are quite thick. Sebangau Subdistrict is one of the subdistricts that has the potential for thick sand deposits, which have been mined by the local community to be used as a mixture of building materials. It is necessary to know the grain size of this grayish-white sand, better known as quartz sand, before mapping out how many potential resources

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Pace, Matthew C., David M. Bailey, David W. Donnan, et al. "Modelling seabed sediment physical properties and organic matter content in the Firth of Clyde." Earth System Science Data 13, no. 12 (2021): 5847–66. http://dx.doi.org/10.5194/essd-13-5847-2021.

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Abstract. High-quality quantitative maps of seabed sedimentary physical and geochemical properties have numerous research and conservation applications, including habitat and ecosystem modelling, marine spatial planning, and ecosystem service mapping. However, such maps are lacking for many ecologically and economically important marine areas. Using legacy data supplemented by measurements from recent benthic surveys, modelled hydrodynamic variables, and high-resolution bathymetry, quantitative maps for the top 10 cm of seabed sediment were generated via a combination of statistical and machin

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He, Shao-Heng, Zhi Ding, Hai-Bo Hu, and Min Gao. "Effect of Grain Size on Microscopic Pore Structure and Fractal Characteristics of Carbonate-Based Sand and Silicate-Based Sand." Fractal and Fractional 5, no. 4 (2021): 152. http://dx.doi.org/10.3390/fractalfract5040152.

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In this study, a series of nuclear magnetic resonance (NMR) tests was conducted on calcareous sand, quartz sand, and glass bead with a wide range of grain sizes, to understand the effect of grain size on the micro-pore structure and fractal characteristics of the carbonate-based sand and silicate-based sand. The pore size distribution (PSD) of the tested materials were obtained from the NMR T2 spectra, and fractal theory was introduced to describe the fractal properties of PSD. Results demonstrate that grain size has a significant effect on the PSD of carbonate-based sand and silicate-based sa

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Alghamdi, M. A. M. "Relationship between Grain Size Distribution and Radon Content in Surficial Sediments of Wadi Arar, Saudi Arabia." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2447–51. http://dx.doi.org/10.48084/etasr.1698.

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Surficial sediments with low radon content are desirable materials in construction applications. In this study, the relationship between grain size and radon content was investigated in sediments collected from seven sites in Wadi Arar, Saudi Arabia, with the intent of determining whether grain size analysis could be used for rapidly assessing the suitability of potential construction materials. Thirty-five samples were collected (five per site) and the grain size distribution was determined using sieves. Radon contents were measured on composite samples with a RAD7 radon detector. Among the s

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Alghamdi, Mohammed A. M. "Relationship between Grain Size Distribution and Radon Content in Surficial Sediments of Wadi Arar, Saudi Arabia." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2447–51. https://doi.org/10.5281/zenodo.1207254.

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Surficial sediments with low radon content are desirable materials in construction applications. In this study, the relationship between grain size and radon content was investigated in sediments collected from seven sites in Wadi Arar, Saudi Arabia, with the intent of determining whether grain size analysis could be used for rapidly assessing the suitability of potential construction materials. Thirty-five samples were collected (five per site) and the grain size distribution was determined using sieves. Radon contents were measured on composite samples with a RAD7 radon detector. Among the s

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B., Padmini, Likitha B., Venkata Kamesh B., Deepika B., Jagadeesh N, and Santhosh Kumar D. "Grain Fineness Number of Various River Sands for Metal Casting." Research and Reviews: Journal of Mechanics and Machines 3, no. 1 (2021): 1–5. https://doi.org/10.5281/zenodo.4817506.

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<em>The Grain Fineness Number (GFN) is the quantitative indication of the grain size distribution of the sand Sample by carrying out sand sieve analysis. The current manuscript aims to determine the value of GFN of various river sands. I.e. to determine the suitability of sand with the physical requirements of sand moulding. Calculating the grain fineness number gives an estimate of the average grain size of the sand sample. The grain size distribution influences the properties of sand as follow refractoriness, green strength, dry strength, hot Strength, permeability, compatibility. Permeabili

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Nasution, Muhammad Arif, Rudi Hermi, Heriansyah Heriansyah, Friyuanita Lubis, and Mira Mauliza Rahmi. "Grain size properties of estuary sediment from Aceh Jaya, Aceh." Depik 13, no. 1 (2024): 54–63. http://dx.doi.org/10.13170/depik.13.1.36454.

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This study aimed to determine the sediment grain size distribution in four estuary locations in Aceh Jaya (Kuta Tuha, Lhok Geulumpang, Krueng No, Keude Unga). These findings will contribute to our understanding of sediment dynamics in estuarine environments and inform management strategies for these critical coastal habitats. The methods used in this study, such as mean, sorting, skewness, and kurtosis, and determination of sediment textural with ternary plot, were used to determine the sediment grain size distribution. In Addition, it will examine the relationship between sediment grain size

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Kajiyama, Shintaro, Yukio Nakata, and Hitoshi Nakase. "Fundamental study on the effect of grain size distribution on angle of repose." E3S Web of Conferences 544 (2024): 01007. http://dx.doi.org/10.1051/e3sconf/202454401007.

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In this study, the authors developed a new sidewall velocity-controlled cylindrical angle of repose measurement apparatus that can capture images of a sand heap continuously using two orthogonal cameras in order to reduce the cost of photography. The developed apparatus was used to measure the angle from formation to repose of sand heap using different grain sizes distribution and to assess the effect of grain size distribution on the angle of repose. The formation process of the sand heap was continuously measured using the experimental apparatus, and it was found that the sand heap became st

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Azhar, A., H. H. Hazril, and M. Redzuan. "The Effect of Sand Grain Size and Water on The Green Compression Strength for Greensand Casting Mould Mixture." Jurnal Kejuruteraan 34, no. 1 (2022): 149–53. http://dx.doi.org/10.17576/jkukm-2022-34(1)-14.

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The focus of this research is to investigate the effect of water content and sand grain size on the green compression strength of a greensand casting mould mixture. Grain size is a major determinant of mould and core green compression strength and surface finish of the greensand casting product. Water influences the efficiency of binder which is bentonite clay in bonding the sand grain particles thus improving the green compression strength. The objective of this study is to study the effect of grain size and water on the green compression strength. The specimen is prepared by mechanical size

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Jiang, Hong Tao, Chun Rong Guo, Chun Xing Hai, Jun Xiu Liu, Yun Hu Xie, and Shan Shan Sun. "Aeolian Sand Size on the Surface of the Northern Foothill of Yinshan Mountain." Applied Mechanics and Materials 668-669 (October 2014): 1499–508. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.1499.

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Sand samplers were laid out in the grassland in the northern foot of Yinshan Mountain for collecting soil flux samples from 0 to 1.5m height above the surface from Mar, 1, 2008 to Feb,29,2009.Grain size parameters proposed by Folk and Ward, including average, SD, skewness and kurtosis of grain size were used. The vertical distribution of grain size characteristic of sediments trapped by sand samplers in different seasons was analyzed by using electrical mirror technology. The results indicated that size of aeolian sand in desert steppe is mainly sand and silt. The content of coarse silt, very

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Lin, Yongchong, Guijin Mu, and Lishuai Xu. "Grain Size and Sedimentary Sorting Characteristics of Atmospheric Dust in the Cele Oasis, Southern Margin of Taklimakan Desert." Sustainability 14, no. 13 (2022): 8093. http://dx.doi.org/10.3390/su14138093.

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Grain size is a proxy indicator of airflow intensity and also provides a scientific basis for the prevention of dust hazards. However, the variations in grain size characteristics that occur during transport and deposition processes are seldom discussed. Here, atmospheric dust samples were collected before and after deposition in a sand–dust storm for grain size analysis. The results showed that the grain size distributions of the atmospheric dust were unimodal during transportation but always became bimodal after deposition. This indicates that the bimodal grain size distribution of the aeoli

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Stewart, Taylor A., David T. Booth, and Mohd Uzair Rusli. "Influence of sand grain size and nest microenvironment on incubation success, hatchling morphology and locomotion performance of green turtles (Chelonia mydas) at the Chagar Hutang Turtle Sanctuary, Redang Island, Malaysia." Australian Journal of Zoology 66, no. 6 (2018): 356. http://dx.doi.org/10.1071/zo19025.

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The nest microenvironment affects hatching and emergence success, sex ratios, morphology, and locomotion performance of hatchling sea turtles. Sand grain size is hypothesised to influence the nest microenvironment, but the influence of sand grain size on incubation of sea turtle eggs has rarely been experimentally tested. At the Chagar Hutang Turtle Sanctuary, Redang Island, Malaysia, green turtle (Chelonia mydas) nests were relocated to sands with different sand grain sizes on a natural beach to assess whether grain size affects nest temperature, oxygen partial pressure inside the nest, incub

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Fomina, Natalya, and Mikhail Polyanskiy. "Grain size distribution of aggregates of crushed concrete." E3S Web of Conferences 97 (2019): 02018. http://dx.doi.org/10.1051/e3sconf/20199702018.

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The results of studies of recycling aggregates obtained by crushing concrete scrap are presented. The heterogeneity of the material received as a result of crushing concrete scrap, complicates the task of selecting the fractional composition of aggregates. The presence of the mortar component in recycled aggregates significantly increases their water demand. This indicates the expediency of their use in a mixture with natural ones. This work aimed at optimizing the granulometry of recycling rubble and sand. Concrete scrap was used for the research. It was represented by destroyed samples of he

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Isakson, Marcia J., and Nicholas P. Chotiros. "Bottom loss modeling and sand grain size." Journal of the Acoustical Society of America 130, no. 4 (2011): 2380. http://dx.doi.org/10.1121/1.3654542.

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Yang, YanYan, LianYou Liu, XiaoYan Li, et al. "Aerodynamic grain-size distribution of blown sand." Sedimentology 66, no. 2 (2018): 590–603. http://dx.doi.org/10.1111/sed.12497.

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Afifah, Rohima Sera, Karmila Karmila, and Nuruddin Kafy El-Ridlo. "KAJIAN MATERIAL SEDIMEN PANTAI BALIKPAPAN UNTUK MENGETAHUI VARIASI UKURAN BUTIR PARTIKEL PASIR (SAND) SEDIMEN." INFO-TEKNIK 22, no. 2 (2022): 173. http://dx.doi.org/10.20527/infotek.v22i2.12391.

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Abstract (sommario):

Along the Balikpapan Beach, there are abundant sand-sized sediment particles. Sand is one of the unconsolidated sediment grains based on fractions on the Wentworth Scale. Unconsolidated Sediment is defined as Loose Material and/or sedimentary rocks that is not yet solid. Balikpapan Beach, based on the Regional Geological Map of Balikpapan sheet, formed the Alluvium Formation (abbreviated as Qa) of the Holocene Epoch, Quaternary. Alluvium formation (Qa) has an arrangement of rocks in the form of pebbles, gravel, sand, and clay. Samples of Unconsolidated Sediment or loose material and sedimentar

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35

Afifah, Rohima Sera, Karmila Karmila, and Nuruddin Kafy El-Ridlo. "KAJIAN MATERIAL SEDIMEN PANTAI BALIKPAPAN UNTUK MENGETAHUI VARIASI UKURAN BUTIR PARTIKEL PASIR (SAND) SEDIMEN." INFO-TEKNIK 22, no. 2 (2022): 173. http://dx.doi.org/10.20527/infotek.v22i2.12391.

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Abstract (sommario):

Along the Balikpapan Beach, there are abundant sand-sized sediment particles. Sand is one of the unconsolidated sediment grains based on fractions on the Wentworth Scale. Unconsolidated Sediment is defined as Loose Material and/or sedimentary rocks that is not yet solid. Balikpapan Beach, based on the Regional Geological Map of Balikpapan sheet, formed the Alluvium Formation (abbreviated as Qa) of the Holocene Epoch, Quaternary. Alluvium formation (Qa) has an arrangement of rocks in the form of pebbles, gravel, sand, and clay. Samples of Unconsolidated Sediment or loose material and sedimentar

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36

Chuhan, Fawad A., Arild Kjeldstad, Knut Bjørlykke, and Kaare Høeg. "Experimental compression of loose sands: relevance to porosity reduction during burial in sedimentary basins." Canadian Geotechnical Journal 40, no. 5 (2003): 995–1011. http://dx.doi.org/10.1139/t03-050.

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Abstract (sommario):

This study examines the one-dimensional stressstrain behaviour of sand at effective stresses as high as 50 MPa. Experiments were performed on 22 sands (approx. 150 tests) with different grain size, uniformity coefficient, angularity, density, grain mineralogy, and clay content. The results show that minor grain corner crushing starts at stresses of 28 MPa. The point of maximum curvature (yield point) in the porosity (n) versus logarithm of vertical effective stress (σ'v) curve defines the initiation of marked particle crushing. The stress at the yield point varies between 3 and 31 MPa depend

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37

Abdullah, Azhar, R. Abdullah, S. K. E. Shariff, and N. Haliza. "Permeability Number for Various Grain Size of Tin Mine Tailing Sand for Greensand Casting Mould." Applied Mechanics and Materials 465-466 (December 2013): 1093–97. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.1093.

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Abstract (sommario):

Tin tailing sand is one of the residues from tin extraction. Tailing sand for sampling was taken from Batu Gajah, which was one of the active locations in tin mining in Malaysia. The silica content of tailing sand from Batu Gajah is between 95.9 to 98.9%. This research is to determine the effect of grain size by the increasing of water content on the permeability number. Grain size is a major determinant of mould and core permeability and surface finish of the casting. In this research involved the process of conducting the mechanical sieve grading to identify the grain size for this research.

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38

Nadj, Laslo. "Characterization of sand boils with grading entropy." Zbornik Matice srpske za prirodne nauke, no. 122 (2012): 73–88. http://dx.doi.org/10.2298/zmspn1222073n.

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Abstract (sommario):

Grain size and grain distribution by size are dominant factors determining soil behaviour. The shape and position of a grain distribution curve contain implicit information about the propensity of sand boiling or piping at flood conditions. The author used 1040-grain distribution curves taken from 12 sand boil locations to study the relationship between sand boils, hydraulic soil failures and entropy. The results have justified the hypotheses and indicated some fairly important details for practical consideration. Calculating grain distribution entropy is not ?magic? with mathematics: it simpl

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39

Nadj, Laslo. "Investigation of sand in piping." Zbornik Matice srpske za prirodne nauke, no. 123 (2012): 115–28. http://dx.doi.org/10.2298/zmspn1223115n.

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Abstract (sommario):

For the investigation of the grain size distribution of the material washed out from the piping, we used 20 samples originating from different places on the Danube and the Tisza rivers. The grading characteristics of these samples were investigated based on selected grain sizes and the uniformity of gradients. Based on the investigations it has become possible to identify which grain size fractions are likely to be washed out, and how to characterize those fractions. Based on the grain size distribution curves it has been made possible to define the boundaries of the zone susceptible to piping

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40

Kells, J. A., R. Balachandar, and K. P. Hagel. "Effect of grain size on local channel scour below a sluice gate." Canadian Journal of Civil Engineering 28, no. 3 (2001): 440–51. http://dx.doi.org/10.1139/l01-012.

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Abstract (sommario):

In this study, the effect of grain size on the dynamics of local scour processes is discussed in the context of the erosion that takes place downstream from a submerged sluice gate. Four gradations of non-cohesive bed material were used to study the scour process for various tailwater depth and flow rate conditions. The sand gradations included three sizes of uniformly graded sand and a fourth size, which was obtained by mixing the three uniform sands in equal proportions by weight. A total of 36 tests was carried out, each for a period of 24 h. An equilibrium scour condition was not attained

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41

Wan Bakar, Wan Zairani, Arina Sauki, Mohd Haziafiz Abd Halim, and Norrulhuda Mohd Taib. "Effect of Fluid Invasion to Formation Resistivity." Advanced Materials Research 1113 (July 2015): 285–95. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.285.

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Abstract (sommario):

Clay is the primary cause for resistivity reduction in most of the low resistivity pay cases. While dry clay acts as insulator, reaction with water made wet clay a good conductor. Clay conductivity is contributed by the exchangeable cation properties of the mineral. This reduces the actual resistivity of the formation, especially in the invaded zone. The effect is more severe if clay existed as dispersed type in the formation; which will also reduce other important petrophysical properties such as porosity and permeability. The study was conducted to observe the mechanism and reduction of form

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42

Nicolas, Arnaud, and Rohinee Bhiwajee. "Grain size analysis and total organic matter and carbonate contents of sediments on Saya de Malha and Nazareth Banks." Western Indian Ocean Journal of Marine Science, no. 2/2021 (July 20, 2022): 81–94. http://dx.doi.org/10.4314/wiojms.si2021.2.6.

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Abstract (sommario):

The Mascarene Plateau is one of the least studied regions of the Western Indian Ocean. The aim of this paper is to describe the qualitative grain size characteristics and the total organic matter and carbonate contents of sediments on the two underwater banks known as the Saya de Malha and Nazareth Banks. Sediment samples were collected during the R/V Dr Fridtjof Nansen expedition in 2018, using a Video-Assisted Multi-Sampler (VAMS). Sieving techniques and GRADISTAT software were used for granulometric analysis and grain size statistics, respectively. Total organic matter and carbonate content

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43

Li, Yi, Jingjing Yu, Zhigang Liu, and Tian Ma. "Estimation and modeling of direct rapid sand filtration for total fecal coliform removal from secondary clarifier effluents." Water Science and Technology 65, no. 9 (2012): 1615–23. http://dx.doi.org/10.2166/wst.2012.054.

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Abstract (sommario):

The filtration of fecal coliform from a secondary clarifier effluent was investigated using direct rapid sand filters as tertiary wastewater treatment on a pilot scale. The effect of the flocculation dose, flow loading rate, and grain size on fecal coliform removal was determined. Direct rapid sand filters can remove 0.6–1.5 log-units of fecal coliform, depending on the loading rate and grain size distribution. Meanwhile, the flocculation dose has little effect on coliform removal, and increasing the loading rate and/or grain size decreases the bacteria removal efficiency. A model was then dev

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44

Chan, Colleen C. V., Kyle Neufeld, Darien Cusworth, Stevan Gavrilovic, and Tommy Ngai. "Investigation of the Effect of Grain Size, Flow Rate and Diffuser Design on the CAWST Biosand Filter Performance." International Journal for Service Learning in Engineering, Humanitarian Engineering and Social Entrepreneurship 10, no. 1 (2015): 1–23. http://dx.doi.org/10.24908/ijsle.v10i1.5705.

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Abstract (sommario):

The effects of grain size, hydraulic loading rate, batch residence time and diffuser design on the performance of the CAWST version 10 biosand filter was investigated. Two types of sand gradations were prepared – fine sand (ES = 0.20, UC = 2.3) and a coarse sand (ES = 0.25, UC = 2.9). The fine sand and coarse grains resulted in initial hydraulic loading rates of 0.3 m3/m2 min and 0.75 m3/m2 min, respectively. Flow restrictions were installed on 2 coarse grain filters such that their initial hydraulic loading rates were 0.3 m3/m2 min. For the range of grain size and flow rates investigated in t

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45

Joo, Incheol, and Jongmuk Won. "Influence of Sand Grain Size and Clay Mineralogy on Suffusion of Sand-Clay Mixtures." Journal of the Korean Society of Hazard Mitigation 23, no. 2 (2023): 91–99. http://dx.doi.org/10.9798/kosham.2023.23.2.91.

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Abstract (sommario):

Suffusion is a type of internal erosion caused by the detachment of fine particles. Additionally, continuous suffusion reduces the stability of geotechnical infrastructures. In this study, the impact of clay mineralogy and sand grain size on the suffusion of sand-clay mixtures was investigated using two-dimensional laboratory experiments on nine different sand-clay mixtures made of three types of sands (K3, K4, and K5) and clays (kaolinite, illite, and bentonite). The breakthrough curve for each sample was obtained for the top/middle/bottom outlets of the designed cell to measure and analyze t

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46

Takano, H., Mitsuaki Furui, Susumu Ikeno, Tomoyasu Yamaguchi, and Seiji Saikawa. "Effect of Grain Size on Microstructure and Aging Behavior in AM60 Magnesium Alloy." Advanced Materials Research 409 (November 2011): 373–78. http://dx.doi.org/10.4028/www.scientific.net/amr.409.373.

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Abstract (sommario):

Our recent studies showed that continuous and cellular precipitates are covered with the whole of crystal grain in age hardable AM60 magnesium alloy cast into permanent molds, which have the average grain size of 75-85μm. Also, continuous precipitation is generated nearby grain boundary in the same alloys cast into sand molds, which have the average grain size of 138-147μm. It’s thought that permanent mold castings have the age hardening behavior of intragranular precipitation participation type that is influenced by continuous precipitates. It’s also thought that sand mold castings have the a

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47

Noshi, Yasuhito, Takaaki Uda, Masumi Serizawa, Takayuki Kumada, and Akio Kobayashi. "MODEL FOR PREDICTING BATHYMETRIC AND GRAIN SIZE CHANGES BASED ON BAGNOLD’S CONCEPT AND EQUILIBRIUM SLOPE CORRESPONDING TO GRAIN SIZE COMPOSITION." Coastal Engineering Proceedings 1, no. 32 (2011): 15. http://dx.doi.org/10.9753/icce.v32.sediment.15.

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Abstract (sommario):

A model for predicting bathymetric and grain size changes considering the equilibrium slopes corresponding to each grain size and its composition was incorporated into the BG model proposed by Serizawa et al. (2007). The model was applied to predict the beach changes at Kemigawa Beach. The cross-shore sorting of sand, in which the grain size gradually decreases with increasing depth, and the formation of a gradually changing longitudinal slope were accurately reproduced. The model was also applied to predict the selective accumulation of fine sand in a navigation channel after dredging and its

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48

Bose, RajanBabu, Nandhagopal Ganesan, Prince Prakash Jebakumar Jebarathnam, Ragumaran Shunmugavel, and Muthaiah Ramakritinan Chokalingam. "ECO-Friendly approach in strengthening the different grain size particles by utilizing Sporsarcina pausterii NIOT1." Research Journal of Chemistry and Environment 25, no. 12 (2021): 137–41. http://dx.doi.org/10.25303/2512rjce137141.

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Abstract (sommario):

A distinct grain size of 600, 425 and 212 μm sand column was developed to test the efficiency of bacterial strain Sporsarcina pausterii NIOT-1. The bacterial strain was effectively able to precipitate calcite crystals between the soil particles through enzymatic hydrolysis of urea which increases ammonium concentration to the maximum of 371.43 mM, 314.54 mM, 302.49 mM, EC of 98.81 ms/cm, 101.84 ms/cm, 101.34 ms/cm and pH of 8.80, 8.90, 8.80 respectively. The synthesized biomaterials have the maximum UCS of 2400 Mpa with 212 μm grain size followed by 425 and 600 μm with 2200 and 2100 Mpa. Scann

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49

Ligier, Krzysztof, and Magdalena Lemecha. "EFFECT OF ABRASIVE PARTICLE SHAPE ON TWO-BODY ABRASIVE WEAR OF STEEL." Tribologia 294, no. 6 (2021): 21–27. http://dx.doi.org/10.5604/01.3001.0014.8332.

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Abstract (sommario):

This paper presents the results of Hardox Extreme steel wear rate testing using an abrasive mass of varying grain shapes. The tests were conducted by the ASTM G65 method using crushed and natural sand with a grain-size distribution of 0.05–2 mm, obtained from a gravel pit. The abrasive materials used in the tests differed in grain shape, while the particle-size distribution was similar. The test results show that the wear rate in crushed sand is four times higher than that in natural sand, which is attributable to the shape of grains and the geometry of their edges.

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50

Palloan, Pariabti, Nur Aminuddin Ansar, Sulistiawaty, and Agus Susanto. "Analysis of Soil Physical Parameters in Landslide Prone Areas in West Battang Village, Palopo City as Early Mitigation of Landslide Disasters." Jurnal Penelitian Pendidikan IPA 9, no. 11 (2023): 10230–35. http://dx.doi.org/10.29303/jppipa.v9i11.3031.

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Abstract (sommario):

This study investigates physical properties parameters of the soil in landslide prone areas in West Battang Village, Palopo City. This study aimed was to determine the grain size of the soil, the value of soil permeability, and the distribution characteristics of the soil in landslide-prone areas. The 30 samples were taken randomly at a depth of 30 cm, then tested the soil grain size, permeability, and the samples distribution. The results showed that the grain size of the soil consisted of gravel, coarse sand, medium sand, and fine sand, with a size of approximately 0.075 – 4.75 mm. The soils

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