Analysis on gold tailings-based aerated concrete in different phases of autoclave curing based on nuclear magnetic resonance / Qian Li in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 6 (12/2019)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 29, N° 6 (12/2019) . - p. 381-387 Titre : Analysis on gold tailings-based aerated concrete in different phases of autoclave curing based on nuclear magnetic resonance Type de document : texte imprimé Auteurs : Qian Li, Auteur ; Keqing Li, Auteur ; Wen Ni, Auteur ; Siqi Zhang, Auteur ; Dezhong Li, Auteur ; Wei Chen, Auteur Année de publication : 2019 Article en page(s) : p. 381-387 Note générale : Bibliogr. Langues : Français (fre) Catégories : Béton cellulaire Matériaux cimentaires -- Analyse Or Résonance magnétique nucléaire Index. décimale : 620.13 Matériaux de construction : pierre, ciment, béton, liants de Résumé : This paper prepares an aerated concrete (AC) with gold tailings as the main material, and explores the influence of different phases of autoclave curing on the microstructure of the proposed AC. Three specimens were selected for nuclear magnetic resonance (NMR) tests: the specimen not autoclaved after the 12h static curing, the specimen autoclaved for 0h in the autoclave (i.e. only heated up and cooled down), and the specimen autoclaved for 8h under constant temperature. The three specimens are denoted as NAC, AAC-0 and AAC-8, respectively. The internal structures of the specimens in each phase of autoclave curing were analyzed through 27Al NMR and 29Si NMR tests. The results show that the Si-O tetrahedrons in the AAC-8 specimen mainly exist in the form of Q2 structures ; the 1.1nm tobermite crystal is a chain silicate. The research results help to reveal the reaction mechanism of the AC in each phase of curing, and improve the performance of gold tailings-based AC. Note de contenu : - METHODOLOGY : Raw materials - Specimen preparation - TEST RESULTS AND DISCUSSION : AI NMR analysis on AC specimens - Si NMR analysis on AC specimens DOI : https://doi.org/10.18280/rcma.290607 En ligne : https://www.iieta.org/download/file/fid/21565 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34945 [article]

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Technical and economic analysis on masonry materials of exterior walls for building energy conservation / Yanhong Wang in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 3 (06/2019)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 29, N° 3 (06/2019) . - p. 139-143 Titre : Technical and economic analysis on masonry materials of exterior walls for building energy conservation Type de document : texte imprimé Auteurs : Yanhong Wang, Auteur ; Yonghe Yao, Auteur ; Yuping Wu, Auteur ; Xiaozhen Li, Auteur Année de publication : 2019 Article en page(s) : p. 139-143 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Béton cellulaire Constructions Energie -- Conservation Maçonnerie Matériaux cimentaires Index. décimale : 693 Construction de bâtiments de matériaux déterminés et à des fins déterminées Résumé : In recent years, resource saving and energy conservation have attracted a growing attention across the globe, calling for technical and economic analysis of energy efficiency of exterior walls in buildings. Targeting an actual building project, this paper introduces the energy-efficient design software PKPM and the cost analysis software GBQ to the technical and economic analysis of the energy efficiency of exterior walls respectively made of three masonry materials: sintered porous bricks (SPBs), autoclaved aerated concrete (AAC) blocks and ceramsite aerated concrete (CAC) blocks. The analysis shows that the exterior walls made of the CAC blocks achieved the energy conservation requirements with the simplest structure, easiest construction and lowest cost. The application of the CAC blocks in exterior walls can save resources and reduce building energy consumption, achieve excellent technical, economic and social benefits, and should be promoted in building projects. Note de contenu : - TYPES AND PROPERTIES OF MASONRY MATERIALS : - TECHNICAL AND ECONOMIC ANALYSIS : Energy-efficient design analysis - Cost analysis - PROJECT APPLICATION : Project overview - Energy-efficient designs - Cost analysis - Table 1 : Technical properties of the three masonry materials - Table 2 : Structural design for the exterior walls made of the SPBs - Table 3 : Structural design for the exterior walls made of the AAC blocks - Table 4 : Structural design for the exterior walls made of the CAC blocks - Table 5 : Unit work costs of the exterior walls made of the SPBs - Table 6 : Unit work costs of the exterior walls made of the AAC blocks - Table 7 : Unit work costs of the exterior walls made of the CAC blocks DOI : https://doi.org/10.18280/rcma.290302 En ligne : https://www.iieta.org/download/file/fid/17535 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34859 [article]

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