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Showing 1 to 17 of 17 for “"Lateritic"”.
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Distribution of precious metals and geochemistry of lateritic ores
Three lateritic profiles from different localities and of varying depth and degrees of development were analyzed for precious metals, platinum, palladium, iridium and gold by radiochemical neutron-activation analysis. In addition, the distribution of major, minor and other trace constituents (iron, …
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Lateritic palaeosols of N.E. Africa: a remote sensing study
… geological techniques, facilitate a study of lateritic palaeosols. The work centres on laterites, which are thin but important elements of the Phanerozoic stratigraphy of NE Africa. They immediately pre-date midOligocene flood basalts and, if mapped, can be used to delineate a flood …
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Evaluation of lateritic coarse aggregates as a partial replacement for granite coarse aggregates in structural concrete.
… replacing Granite Coarse Aggregate (GCA) with Lateritic Coarse Aggregates (LCA). The properties of LCA concrete evaluated included; but were not limited to the fresh and hardened state properties of LCA concrete, some durability properties of the concrete such as Sorptivity, water accessible …
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Evaluation of lateritic coarse aggregates as a partial replacement for granite coarse aggregates in structural concrete.
… replacing Granite Coarse Aggregate (GCA) with Lateritic Coarse Aggregates (LCA). The properties of LCA concrete evaluated included; but were not limited to the fresh and hardened state properties of LCA concrete, some durability properties of the concrete such as Sorptivity, water accessible …
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Suitability of Lateritic Soils as Construction Material in Sustainable Housing Development in Africa : a Geological Perspective
Lateritic soils which have been described as highly weathered tropical or sub-tropical residual soils with varying proportions of particle sizes ranging from clay size to gravel, were studied in an attempt to establish its suitability or otherwise as sustainable material in building bricks and …
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Estudo da fadiga de duas misturas de solo-cimento
… test, for two differents tipes of soil-cement: lateritic soil-cement mixture and saprolitic soil-cement mixture. Fatigue curves, in terms of stress, strain and stress level, were developed for the two stabilized materials, of each repeated load-test. A comparision was made, of the effects in …
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Manipulating aqueous chemistry environments in extractive metallurgy
… processing route for the recovery of nickel from lateritic ore deposits that is both economical and environmentally acceptable.
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Estabilização de um solo fino laterítico pelo ácido fosfórico
… verify the possibilities of stabilizing a fine lateritic soil with phosphoric acid. A sample of "terra roxa legítima" from Campinas, São Paulo, was studied. This is a lateritic soil resulting from the weathering of a diabase, and presenting 20% of free Fe2 O3; it has 100% passing no. 20 sieve …
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Optimisation of selective extraction techniques as a tool for geochemical mapping in the Southern Africa region
… at Amalia Blue Dot Mine in South Africa and lateritic regolith covering the Ni-Cu deposit at Kabanga Main and Luhuma in Tanzania. Regolith samples from the above areas were sieved and extracted with hydroxylamine hydrochloride solution and analyzed for multi-element by AAS and ICP-MS …
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Contribuição ao estudo do Método físico-químico de dosagem do solo-cimento
… of Soil-Cement, by using four soils of lateritic weathering with different characteristics. The method's precision was appraised by means of repeatability and reproducibility indicators. For this purpose, ten assays were made on each soil with the same oparator and an interlaboratorial …
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Methoden der EDV-gestützten, dreidimensionalen Lagerstättenmodellierung am Beispiel ausgewählter Bauxitvorkommen
… for the two main types of bauxite deposits: lateritic and karst bauxite deposits. The selected sites are Kirkvine (Jamaica), Parnasse (Greece) and Los Pijiguaos (Venezuela). The geological models of these bauxite deposits respectively the selected ore bodies give detailed information about …
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Of brick and 'chuna': Technological tradition and innovation at the Fort Cornwallis powder magazine in Penang, Malaysia
… organic additives like jaggery water as well as lateritic clays and/or brick dust, evidencing a fusion of construction techniques. Ultimately, the powder magazine emerges as more than a simple military relic. It is a manifestation of colonial adaptation, multicultural exchange, and environmental …
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The development of a geopolymer binder from the interbasaltic laterites of Northern Ireland
… thesis examines the composition of these lateritic clays using various analytical methods to determine their ability to form a geopolymer binder with a view to providing a case study which could be applied wherever similar clays are found globally. It was found that such clays could result …
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Mineralogical and micromorphological characterisation of two soil sequences of the UNZA-FARM(Zambia)
… show evidence of metamorphic origin, and lateritic origin. The soils have been found to have low CEC and a relatively high amount of iron oxides The presence of the iron oxides, and kaolinite, with micas, has been used to explain the observed low CEC. As regards management properties, it …
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Mineralogical and micromorphological characterisation of two soil sequences of the UNZA-FARM(Zambia)
… show evidence of metamorphic origin, and lateritic origin. The soils have been found to have low CEC and a relatively high amount of iron oxides The presence of the iron oxides, and kaolinite, with micas, has been used to explain the observed low CEC. As regards management properties, it …
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The genesis of the blue amphibole asbestos of the Union of South Africa.
… of the material which remained behind as "lateritic" soils in the source area. It is suggested that both crocidolite and riebeckite were formed by the low temperature dehydration, in situ, of an ordered precursor which could have been a clay mineral similar in structure to attapulgite, but …