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Risoluzione schermo: 640 x 480 800 x 600 1024 x 768 1280 x 1024 Nome utente: Password: Formato: Basic  Help  Richiesta  Formato: Tipo di Carattere Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Dimensione del Carattere 1 2 3 4 5 6   Colore del Carattere Nero Rosso Giallo Rosa Verde Arancione Viola Blu Beige Marrone Verde Bosco Blu scuro Marrone scuro Verde chiaro Messaggio: HTML non è attivo Il codice su forum è attivo Faccine [quote][i]Originariamente inviato da SAKURAJUN[/i] [br]Unburned carbon removal effect on compressive strength development in a honeycomb briquette ash-based geopolymer[url=https://www.wyactivatedcarbon.com/]https://www.wyactivatedcarbon.com/[/url] The potential of honeycomb briquette ash as a new source material for the manufacture of geopolymers was examined. The successful geopolymerization of honeycomb briquette ash was attained by means of NaOH treatment. The concentrations of the major and minor elements of honeycomb briquette ash are in the normal range of the chemical composition of fly ash and appropriate for the synthesis of geopolymers. Honeycomb briquette ash contains 9.88 wt.% unburned carbon, however, all but 0.04% of the unburned carbon was removed in clean ash by means of a froth flotation process. The development of the compressive strength of the geopolymer bodies is affected by the unburned carbon content, the molar concentration of the NaOH solution, the curing temperature, and the curing time. With a few exceptions, a high compressive strength was achieved for the unburned carbon-free ash-based geopolymer bodies regardless of the curing temperature and the curing time. A geopolymer body was prepared by the dissolution of unburned carbon-free ash in 12 M of NaOH solution and curing at 80 °C for 7 days. Under these conditions, the compressive strength of the geopolymer body increased to 65.63 MPa. This value is almost double the highest value of a geopolymer body, prepared by the dissolution of as-received ash in 12 M of NaOH solution and curing at 80 °C for 28 days. In conclusion, unburned carbon-free honeycomb[url=https://www.wyactivatedcarbon.com/products/other-activated-carbon/honeycomb-activated-carbon.html]honeycomb active carbon[/url] briquette ash could be an alternative to Portland cement as a prospective cementitious material. [/quote]   Seleziona qui per inserire la tua firma.