Rice husk and waste glass from sources in Cameroon were used for producing sodium waterglass (NWG) solution denoted S1 and S2 respectively as alternative activators to prepare metakaolin-based geopolymer binder. Metakaolin-based geopolymer binders (G1, G2) were obtained using freshly prepared NWG with a mass ratio NWG/MK = 0.83. The IR spectra of S1, S2 using ATR and KBr methods show the presence of SiQ0, SiQ1, SiQ2 units, and S1 contained also SiQ3 and SiQ4 units. The mechanical testing, environmental scanning electron microscopy, mercury intrusion porosimetry, X-ray diffractometry, infrared spectroscopy, amount of binders and thermogravimetric analysis are investigated to study the properties of the geopolymer binders. The results show that the compressive strength values of geopolymer G2 (22.9, 27.6, 32.6, 36 and 39.7 MPa) are higher than that of G1 (17.7, 19.1, 21.2, 29.9 and 32.8 MPa) at 7, 14, 21, 28 and 56 days respectively. The microstructure of G2 is more compact with fewer unreacted metakaolin particles. It can be concluded that sodium waterglass from waste glass and rice husk ash are suitable alternative activators for the production of metakaolin-based geopolymers. In addition, they constitute a better ecological choice when compared to commercial sodium silicate from melting process.

Geopolymer binders from metakaolin using sodium waterglass from waste glass and rice husk ash as alternative activators: A comparative study / Tchakouté, Hervé K.; Rüscher, Claus H.; Kong, Sakeo; Kamseu, Elie; Leonelli, Cristina. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - ELETTRONICO. - 114:(2016), pp. 276-289. [10.1016/j.conbuildmat.2016.03.184]

Geopolymer binders from metakaolin using sodium waterglass from waste glass and rice husk ash as alternative activators: A comparative study

LEONELLI, Cristina
2016

Abstract

Rice husk and waste glass from sources in Cameroon were used for producing sodium waterglass (NWG) solution denoted S1 and S2 respectively as alternative activators to prepare metakaolin-based geopolymer binder. Metakaolin-based geopolymer binders (G1, G2) were obtained using freshly prepared NWG with a mass ratio NWG/MK = 0.83. The IR spectra of S1, S2 using ATR and KBr methods show the presence of SiQ0, SiQ1, SiQ2 units, and S1 contained also SiQ3 and SiQ4 units. The mechanical testing, environmental scanning electron microscopy, mercury intrusion porosimetry, X-ray diffractometry, infrared spectroscopy, amount of binders and thermogravimetric analysis are investigated to study the properties of the geopolymer binders. The results show that the compressive strength values of geopolymer G2 (22.9, 27.6, 32.6, 36 and 39.7 MPa) are higher than that of G1 (17.7, 19.1, 21.2, 29.9 and 32.8 MPa) at 7, 14, 21, 28 and 56 days respectively. The microstructure of G2 is more compact with fewer unreacted metakaolin particles. It can be concluded that sodium waterglass from waste glass and rice husk ash are suitable alternative activators for the production of metakaolin-based geopolymers. In addition, they constitute a better ecological choice when compared to commercial sodium silicate from melting process.
2016
114
276
289
Geopolymer binders from metakaolin using sodium waterglass from waste glass and rice husk ash as alternative activators: A comparative study / Tchakouté, Hervé K.; Rüscher, Claus H.; Kong, Sakeo; Kamseu, Elie; Leonelli, Cristina. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - ELETTRONICO. - 114:(2016), pp. 276-289. [10.1016/j.conbuildmat.2016.03.184]
Tchakouté, Hervé K.; Rüscher, Claus H.; Kong, Sakeo; Kamseu, Elie; Leonelli, Cristina
File in questo prodotto:
File Dimensione Formato  
Construction and Building Materials 114 (2016) 276–289.pdf

Accesso riservato

Descrizione: Articolo pubblicato
Tipologia: Versione pubblicata dall'editore
Dimensione 4.19 MB
Formato Adobe PDF
4.19 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1106439
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 195
  • ???jsp.display-item.citation.isi??? 180
social impact