Comparative Appraisal of Tunisian and Portuguese Smectitic Clays as Raw Materials for the Production of Light Weight Aggregates

• FAKHFAKH EMNA

  Laboratoire de Georessources INRST BP 95

• BARROS OLGA

  Research centre "Minerais Industriais e Argilas" (FCT), Univ. Aveiro

• MEDHIOUB MOUNIR

  Department des Sciences de la Terre, Faculte des Sciences de Sfax. Tunisia

• ROCHA FERNANDO

  Research centre "Minerais Industriais e Argilas" (FCT), Univ. Aveiro

• GOMES CELSO

  Research centre "Minerais Industriais e Argilas" (FCT), Univ. Aveiro

• MARQUES JOAO

  Centro Tecnologico da Ceramica e do Vidro

• COROADO JOAO

  Research centre "Minerais Industriais e Argilas" (FCT), Instituto Politecnico de Tomar

• KOOLI FETHI

  ICES

• ZARGOUNI FOUAD

  Department de Geologie, Faculte des Sciences de Tunis

• JAMOUSSI FAKHER

  Laboratoire de Georessources INRST BP 95

抄録

Tunisian and Portuguese smectitic clays are under study to assess their potentialities to be used as natural raw materials for the production of Light Weight Aggregates which have an important function in civil construction work. Several smectitic clay deposits from the meridional Atlas domain (Tunisia) and from the Meso-Cenozoic Lusitanian Basin (Portugal) were studied for this purpose. Characterization of these clays includes mineralogical and chemical analysis, dosage of total organic carbon, grain size analysis and thermal analysis. Small balls (1 to 1.5cm in diameter) were prepared with these clays in the plastic state and were submitted to the firing temperatures ranging from 1050 up to 1180℃, during time intervals ranging from 5 to 15 min. Special additives like motor oil, phosphate residues and sand, in different proportions, were mixed with the smectitic clays in order to obtain better expansion. The following properties were determined on the bloated balls: apparent density, mechanical resistance corresponding to the rupture under compression point and water absorption. The bloated balls showed appreciable properties. Each additive has positive effects but in dependent on the original clay material. The results were comparatively appraised not only between Tunisian and Portuguese clays but also with commercial products.

収録刊行物

• Clay science

  Clay science 12 113-118, 2006-04-01

  日本粘土学会

キーワード

• Light Weight Aggregates
• Smectitic clays
• Portugal
• Tunisia

詳細情報

• CRID: 1572824501863790208
• NII論文ID: 110004867667
• NII書誌ID: AA00607148
• ISSN: 00098574
• 本文言語コード: en
• データソース種別:
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