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Evaluation of natural pozzolan for use as supplementary cementitious material / Yassine Senhadji in European journal of environmental and civil engineering, Vol. 16 N° 1 (Janvier 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 1 (Janvier 2012) . - pp. 77-96 Titre : Evaluation of natural pozzolan for use as supplementary cementitious material Type de document : texte imprimé Auteurs : Yassine Senhadji, Auteur ; Gilles Escadeillas, Auteur ; Hamid Khelafi, Auteur Année de publication : 2012 Article en page(s) : pp. 77-96 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Pozzolans  Strength  activity  index  Setting  time  Heat  of  hydration  Chloride  ion  Durability Résumé : This paper presents preliminary study results on the use of local natural pozzolan (NP) as a mineral addition. The natural pozzolan was obtained from a source in north-western Algeria and was composed of zeolite and plagioclase, which are mineralogical materials containing large quantities of SiO2 and Al2O3. A number of cements were prepared in which portland cement (OPC) was replaced by NP in the range of 0–25%. The parameters investigated included pozzolanic activity, setting times, heat of hydration, compressive strength, and the crystalline hydration products (by XRD).The pozzolanic activity index was evaluated on the basis of physical and mechanical parameters (standards ASTM C618 and ASTM C311) and through a chemical analysis (European standard NF EN 196-5). The performance of natural pozzolan cement exposed to aggressive solutions (sulphuric and nitric acids) and their resistance to chloride permeability were also analysed. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667692 [article] Evaluation of natural pozzolan for use as supplementary cementitious material [texte imprimé] / Yassine Senhadji, Auteur ; Gilles Escadeillas, Auteur ; Hamid Khelafi, Auteur . - 2012 . - pp. 77-96. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 1 (Janvier 2012) . - pp. 77-96 Mots-clés : Pozzolans  Strength  activity  index  Setting  time  Heat  of  hydration  Chloride  ion  Durability Résumé : This paper presents preliminary study results on the use of local natural pozzolan (NP) as a mineral addition. The natural pozzolan was obtained from a source in north-western Algeria and was composed of zeolite and plagioclase, which are mineralogical materials containing large quantities of SiO2 and Al2O3. A number of cements were prepared in which portland cement (OPC) was replaced by NP in the range of 0–25%. The parameters investigated included pozzolanic activity, setting times, heat of hydration, compressive strength, and the crystalline hydration products (by XRD).The pozzolanic activity index was evaluated on the basis of physical and mechanical parameters (standards ASTM C618 and ASTM C311) and through a chemical analysis (European standard NF EN 196-5). The performance of natural pozzolan cement exposed to aggressive solutions (sulphuric and nitric acids) and their resistance to chloride permeability were also analysed. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667692

Use of plant aggregates in building ecomaterials / Camille Magniont in European journal of environmental and civil engineering, Vol. 16 Supplément N° 1 (Juin 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s17-s33 Titre : Use of plant aggregates in building ecomaterials Type de document : texte imprimé Auteurs : Camille Magniont, Auteur ; Gilles Escadeillas, Auteur ; Marie Coutand, Auteur Année de publication : 2012 Article en page(s) : pp. s17-s33 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Plant  aggregate  Hemp  shiv  Sunflower  pith  Durability  Eco-friendly  building  material Résumé : The aim of this paper is to compare hemp shiv and sunflower pith properties when they are used as plant aggregates incorporated into a pozzolanic matrix. Scanning electron microscope observation of these aggregates showed distinct microstructures, which could be responsible for the differences in mechanical and thermal behaviour observed between composites including these two types of plant aggregates. The long-term behaviour of composites revealed the mineralization of plant aggregates, in particular hemp shiv, by calcium compounds. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682452 [article] Use of plant aggregates in building ecomaterials [texte imprimé] / Camille Magniont, Auteur ; Gilles Escadeillas, Auteur ; Marie Coutand, Auteur . - 2012 . - pp. s17-s33. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 Supplément N° 1 (Juin 2012) . - pp. s17-s33 Mots-clés : Plant  aggregate  Hemp  shiv  Sunflower  pith  Durability  Eco-friendly  building  material Résumé : The aim of this paper is to compare hemp shiv and sunflower pith properties when they are used as plant aggregates incorporated into a pozzolanic matrix. Scanning electron microscope observation of these aggregates showed distinct microstructures, which could be responsible for the differences in mechanical and thermal behaviour observed between composites including these two types of plant aggregates. The long-term behaviour of composites revealed the mineralization of plant aggregates, in particular hemp shiv, by calcium compounds. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.682452