Glass waste based geopolymers and their characteristics / Taha H. Abood Al-Saadi in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 1 (02/2022)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 32, N° 1 (02/2022) . - p. 17-23 Titre : Glass waste based geopolymers and their characteristics Type de document : texte imprimé Auteurs : Taha H. Abood Al-Saadi, Auteur ; Rana K. Abdulnabi, Auteur ; Muna N. Ismael, Auteur ; Hazim F. Hassan, Auteur ; Mohanad Kadhim Mejbel, Auteur Année de publication : 2022 Article en page(s) : p. 17-23 Note générale : Bibliogr. Langues : Français (fre) Catégories : Géopolymères -- Propriétés mécaniques Géopolymères Les géopolymères sont la réciproque des polymères organiques. À la place de dérivés du pétrole et de la chaîne carbonée, on utilise de la matière minérale composée de silice et d’alumine. Les géopolymères sont basés sur des alumino-silicates désignés sous le terme poly(sialate), qui est une abréviation de poly(silico-oxo-aluminate) ou (-Si-O-Al-O-)n (soit n le degré de polymérisation). La structure chimique de la Figure 1 montre un géopolymère poly(sialate-siloxo) résultant d'une géosynthèse de poly(silisique) acide (SiO2)n et de potassium alumino-silicate, en milieu alcalin (KOH, NaOH). Dans cette structure, le groupement sialate (Si-O-Al-O-) est un agent de réticulation. On pense que le mécanisme de la synthèse géochimique se fait par l'intermédiaire d'oligomères (dimère, trimère) qui constituent les véritables groupements structuraux unitaires formant une structure macromoléculaire tridimensionnelle. Mortier Moussants Polymères inorganiques Poudre de verre Stabilité hydrolytique Traitement thermique Verre -- Recyclage Index. décimale : 668.4 Plastiques, vinyles Résumé : Inorganic polymer materials (Geopolymers) are synthesized using alumino-silicate sources as solid components with an alkaline solution. This material is used as an alternative for building materials and provides thermal protection as foaming materials. This paper presents the preparation of these materials by the reaction between glass waste (from brown color bottles BP) with sodium hydroxide NaOH and sodium aluminum (AN5) solutions as alkali activators. For the preparation of mortars (BP-N5 and BP-AN5), sand was used as aggregate. The compressive strengths were assessed (24 and 6 MPa) respectively before heat treatment, the hydrolytic stability (PH and conductivity) tests were performed. Furthermore, hardened mortars have been heated at very high temperatures in the range of 200℃ to 800℃ within two hours. Based on the nature of the foaming behavior of such materials, various variables have changed; (80-140) % volume increase and porosity rise through the process of heat treatment, particularly at 600℃ and 800℃. On the other hand, (3.5-7) % mass reduction occurred. It can be said that the more significant porosity with different geometrical configurations (sizes and shapes) of such materials can be considered as acoustic insulation and thermal materials. Note de contenu : - EXPERIMENTAL SECTION : Materials - METHODS - RESULTS AND DISCUSSION : Specification of the mortar - Heat treatment - Mechanical strength and hydrolytic stability - Table 1 : The brown glass powder oxide composition (%) - Table 2 : Mortar specimens (BP-N5 and BP-AN5) after thermal treatment for 2 hours DOI : https://doi.org/10.18280/rcma.320103 En ligne : https://www.iieta.org/download/file/fid/70883 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37694 [article]

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Pollution prevention / Steven Hicks in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 2 (02/2011)

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 18, N° 2 (02/2011) . - p. 30-34 Titre : Pollution prevention : A innovative hard surface composite paving system uses post-consumer recycled glass Type de document : texte imprimé Auteurs : Steven Hicks, Auteur ; David K. Bower, Auteur ; William G. Handlos, Auteur Année de publication : 2011 Article en page(s) : p. 30-34 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites Filtration Matériaux poreux Pollution -- Lutte contre Stratifiés Trottoirs Verre -- Recyclage Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Billions of gallons of untreated stormwater pollute our lakes, rivers and oceans every year. Conventional concrete and asphalt pavements concentrate these pollutants at the storm drains. Whether it is through a combined sanitary sewer system or a local detention pond, treatment is expensive. In most areas, the stormwater remains untreated, allowing the pollutants to flow directly into our waterways. The next time you walk across a street or through a parking lot, take a closer look around. You’ll probably see some solid waste like paper, food, bird droppings or animal feces, or possibly some fertilizer from a neighboring lawn. More than likely, there will be some stains from cars that have leaked oil, brake fluid, transmission fluid or antifreeze. What do you think will happen to these materials during the next rain? In all probability, they will end up in a storm drain that is discharged directly into a local lake, river or ocean. Recent studies have found that urban rainwater and snowmelt rivals (and in some cases exceeds) sewage plants and large factories as a source of damaging pollutants.1 Storm water washing over impervious surfaces can pick up toxic chemicals, disease-causing organisms, dirt and trash. Conventional hard-surface pavements concentrate these pollutants at the storm drains, thereby creating what the U.S. Environmental Protection Agency (EPA) considers a point source emission of pollutants. In most cases, stormwater is not treated because it is too expensive or impractical. A Filterpave® porous pavement system can reduce or eliminate stormwater runoff from many areas and provides some unique benefits compared to impervious pavement or even other types of porous pavement. It is appropriate for parking areas, driveways, walkways, patios, golf cart paths and other light- to medium-duty traffic areas. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10874 [article]

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