References of "Clay Minerals"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailMineralogical and geotechnical characterization of clays from Northern Morocco for their potential use in ceramic industry
El Ouahabi, Meriam ULg; Daoudi, Lahcen; Fagel, Nathalie ULg

in Clay Minerals (2014), 49

This study focuses on the mineralogical and geotechnical characterization of Northern Morocco clays (i.e., from Tangier and Tetouan areas) and further comparison with main clay ores used in national ... [more ▼]

This study focuses on the mineralogical and geotechnical characterization of Northern Morocco clays (i.e., from Tangier and Tetouan areas) and further comparison with main clay ores used in national ceramic (i.e., from Meknes, Fes, Salé and Safi regions). Sampled clays were analyzed by X-ray diffraction on bulk and clay (< 2 µm) fractions to identify the mineralogical assemblages of the clay outcrops. Further analyses were conducted to determine the particle size distribution (laser diffraction particle analyser), the total organic matter content (from LossOnIgnition measurements) and the Atterberg limits of the raw clays. The aims of this study were first to investigate the spatial variability of the clay samples and second to evaluate their potential application as raw materials in ceramic industry. Tetouan and Tangier clays are characterized by diversified mineralogical assemblages (in particular a variable proportion of clay, quartz and calcite) in regard with Meknes, Fes, Salé and Safi clays (high clay content, quartz and calcite). The clay fraction of Tetouan and Tangier samples is dominated by illite and kaolinite with variable contribution of chlorite, smectite and/or vermiculite. Illite is the dominant phase in Meknes, Fes, Safi and Salé clays, but is associated with kaolinite. There is no direct relationship between the mineral assemblage composition and the lithology of the series. The studied clays materials consist generally in fine particles with medium to high plasticity and low organic matter content. Taking into account mineralogy, grain-size distribution and plasticity those clays seem to be suitable as raw material for the growing Morocco ceramic industry. [less ▲]

Detailed reference viewed: 97 (27 ULg)
Full Text
Peer Reviewed
See detailCharacterization of clay deposits of Nanga-Eboko (Central Cameroon): Suitability in the production of building materials
Nzeukou Nzeugang, A.; Medjo Eko, R.; Fagel, Nathalie ULg et al

in Clay Minerals (2013), 48(4), 655-662

Detailed reference viewed: 24 (8 ULg)
Full Text
Peer Reviewed
See detailCharacterization of clay deposits of Nanga-Eboko (Central Cameroon): Suitability in the production of building materials
Mache, Jacques Richard ULg

in Clay Minerals (2013), 48

Clayey deposits of Nanga-Eboko (Central Cameroon) were studied to assess their potential as building materials. Characterization was performed using XRD, IR, XRF, DTA/DTG and firing. Clays appear as ... [more ▼]

Clayey deposits of Nanga-Eboko (Central Cameroon) were studied to assess their potential as building materials. Characterization was performed using XRD, IR, XRF, DTA/DTG and firing. Clays appear as discontinuous pockets with the same organizational characteristics in three villages located on both sides of the Sanaga River. The average thickness of exploitable layer is about 3m. The estimated tonnage ~7-17x105 m3 can supply an industry of great importance. SiO2 (~70%), Al2O3 (~15%) and Fe2O3 (~4%) are the predominant oxides of the natural clays. Quartz (~55%), kaolinite (~33%), illite (~5%) and K-feldspar (~4%) are major minerals. Clays are not suitable for building construction due to their fine-grained size and high plasticity properties. Firing properties of bricks (950 and 1050°C) are good despite the high shrinkage values. Therefore the addition of "degreasers' is recommended to control shaping and drying. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailSmectite clay from the Sabga deposit (Cameroon): mineralogical and physicochemical properties
Mache, Jacques Richard ULg; Nyoja, A.; Signing, P. et al

in Clay Minerals (2013), 48(48), 499-512

The physicochemical and mineralogical characterization of the < 250 µm particle-size fraction from six the clay-rich samples from the Sabga deposit (North-west, Cameroon) were carried out in order to ... [more ▼]

The physicochemical and mineralogical characterization of the < 250 µm particle-size fraction from six the clay-rich samples from the Sabga deposit (North-west, Cameroon) were carried out in order to evaluate their potential applications. Analyses revealed that the major clay mineral was dioctahedral smectite along with small amounts of kaolinite in three clay samples. Cristobalite, feldspars, ilmenite and heulandites were also found as accessory minerals. A Li-saturation test (Greene-Kelly test) revealed the montmorillonitic nature of the smectite component. The chemical composition of the bulk clays consists of (66-70%) SiO2, (13-16%) Al2O3 and (2-7%) Fe2O3. These clays present mineralogical (high montmorillonite content) and physico-chemical (cation exchange capacity (CEC): 38 to 46 meq/100g and specific surface areas ranging from 33 to 90 m2/g). These physical and chemical properties are fully compatible with potential uses in environmental applications. After some pretreatment (purification, chemical modification), these materials could also be used in refining edible oil as adsorbent, waste water treatment and wine technology. [less ▲]

Detailed reference viewed: 50 (15 ULg)
Full Text
Peer Reviewed
See detailComparative influence of burial depth on the clay mineral assemblage of the Agadir-Essaouira basin (western High Atlas, Morocco)
Daoudi, Lachen; Ouajhain, B.; Rocha, F. et al

in Clay Minerals (2010), 45(4), 453-467

Detailed reference viewed: 25 (2 ULg)
Full Text
Peer Reviewed
See detailXRD and NMR characterization of synthetic hectorites and the corresponding surfactant-exchanged clays
Gertsmans, André; Urbanczyk, Laetitia ULg; Jérôme, Robert ULg et al

in Clay Minerals (2008), 43

Detailed reference viewed: 80 (39 ULg)
Full Text
Peer Reviewed
See detailSolid-state NMR study of modified clay and polymer/clay nanocomposites
Grandjean, Jean ULg

in Clay Minerals (2006), 41

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailNMR study of surfactant molecules intercalated in montmorillonite and silylated montmorillonite
Grandjean, Jean ULg; Bujdak, Janec; Komadel, Peter

in Clay Minerals (2003), 38

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailNa-23 2D 3QMAS NMR and Si-29, Al-27 MAS NMR investigations of Laponite and synthetic saponites of variable interlayer charge
Delevoye, Laurent; Robert, Jean-Louis; Grandjean, Jean ULg

in Clay Minerals (2003), 38

Detailed reference viewed: 46 (0 ULg)
Full Text
Peer Reviewed
See detailSignificance of random illite-vermiculite mixed layers in Pleistocene sediments of the northwestern Atlantic Ocean
Vanderaveroet, P.; Bout-Roumazeilles, V.; Fagel, Nathalie ULg et al

in Clay Minerals (2000), 35(4), 679-691

The clay mineralogy of Pleistocene sediments of eleven sediment cores at three ODP sites from 30 degrees N to 60 degrees N northwestern Atlantic Ocean has been investigated. The sediments are ... [more ▼]

The clay mineralogy of Pleistocene sediments of eleven sediment cores at three ODP sites from 30 degrees N to 60 degrees N northwestern Atlantic Ocean has been investigated. The sediments are characterized by the presence of random illite-vermiculite mixed layers (I-V) (up to 32% of the clay mineral assemblage). The I-V clays are much more abundant during interglacial periods than during glacial ones. They are attributed to detrital supply through erosion of high-latitude continental areas from which they are derived mainly from chemical weathering of micaceous phyllosilicates. Their spatial distribution and the specific conditions for their formation through weathering suggest that I-V mixed layers are mainly derived from the Canadian Shield. They were transported From their source to marine deposition areas by rivers, deep water masses or nepheloid layers. Due to the specific conditions required For the Formation of I-V, its occurrence and abundance are used as a palaeoclimate and palaeocirculation proxy for northwestern Atlantic Pleistocene sediment. [less ▲]

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailSudoite in some Visean (Lower Carboniferous) K-bentonites from Belgium
Anceau, Annick ULg

in Clay Minerals (1992), 27

Detailed reference viewed: 62 (46 ULg)