The effects of Na2O/SiO2 molar ratio, curing temperature and age on compressive strength, morphology and microstructure of alkali-activated fly ash-based geopolymers

Cement and Concrete Composites

Volumn 33, Issue 6, 2011, Pages 653-660

  De Vargas, Alexandre Silva ^a   Dal Molin, Denise C C ^b   Vilela, Antônio C F ^b   Silva, Felipe José Da ^c   Pavão, Bruno ^b   Veit, Hugo ^b  

^a UNIVERSIDADE FEEVALE   (Brazil)

^b FEDERAL UNIVERSITY OF RIO GRANDE DO SUL   (Brazil)

^c MILITARY INSTITUTE OF ENGINEERING   (Brazil)

Author keywords

Alkali activation; Fly ashes; Geopolymers; Residues

Indexed keywords

ALKALI ACTIVATION; CIVIL ENGINEERING PROJECTS; COMPRESSION STRENGTH; CURING TEMPERATURE; DENSE MATRICES; ELECTRICITY PRODUCTION; LARGE PARTS; MECHANICAL PERFORMANCE; MICROSTRUCTURAL PROPERTIES; MOLAR RATIO; MORPHOLOGICAL CHARACTERISTIC; POZZOLANIC PROPERTIES; RESIDUES; SEM/EDS; STRUCTURAL CONCRETES;

BYPRODUCTS; CIVIL ENGINEERING; COAL ASH; CURING; FLY ASH; GEOPOLYMERS; INORGANIC POLYMERS; MECHANICAL PROPERTIES; MORPHOLOGY; MORTAR; SCANNING ELECTRON MICROSCOPY; SODIUM; THERMOELECTRIC POWER PLANTS; X RAY DIFFRACTION; X RAY DIFFRACTION ANALYSIS;

COMPRESSIVE STRENGTH;

EID: 79955852335     PISSN: 09589465     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.cemconcomp.2011.03.006     Document Type: Article

References (27)

1. Vieira JC. Valorizaão do "Ouro Negro". Jornal Correio do Povo 2005; Porto Alegre (brazil) no 312, 4 agosto; 2005. p. 4 [in Portuguese].
2. Rohde GM. Cinzas de carvão no Brasil: Restriões ambientais e medidas mitigadoras. In: Rohde GM, et al. Cinzas de carvão fóssil no Brasil - Aspectos Técnicos e Ambientais, Porto Alegre: CIENTEC. 2006. p. 137-95 [chapter 2, in Portuguese].
3. Vargas AS. Cinzas volantes álcali-ativadas para a obtenão de aglomerantes especiais. Porto Alegre. Tese (Doutorado em Engenharia) - Curso de Pós-Graduaão em Engenharia de Minas, Materiais e Metalurgia (PPGEM), UFRGS. 2006. p. 169 [in Portuguese].
4. F. Puertas, and A. Fernández-Jiménez Mineralogical and microstructural characterisation of alkali-activated fly ash/slag pastes Cem Concr Compos 25 2003 287 292
5. Deja J. Properties of activated pastes containing metakaolin and other mineral additives. In: of The 11th international congress on the chemistry of cement (ICCC), 11, Africa of South; 2003. p. 832-42.
6. A. Fernández-Jiménez, J.G. Palomo, and F. Puertas Alkali-activated slag mortars mechanical strength behaviour Cem Concr Res 29 1999 1313 1321
7. John V M. Cimentos de escória ativada com silicatos de sódio. São Paulo. Tese (Doutorado em Engenharia) - Departamento de Engenharia de Construão Civil, Escola Politécnica da Universidade de São Paulo (EPUSP); 1995. p. 200 [in Portuguese].
8. Skavara F, Slosar J, Bohunck J, Markova A. Alakali-activated fly ash geopolymeric materials. In: Of the 11th international congress on the chemistry of cement (ICCC), 11, Africa of South; 2003. p. 1341-1350.
9. M. Sofi, J.S.J. Van Deventer, and P.A. Mendis Lukey GC. Engineering properties of inorganic polymer concretes (IPCs) Cement Concrete Res 37 2007 251 257 (Pubitemid 46178425)
10. A. Katz Microscopic study of alkali-activated fly ash Cement Concrete Res 28 2 1998 197 208 (Pubitemid 128638407)
11. A. Fernández-Jiménez, A. Palomo, and M. Criado Microstructure development of alkali-activated by fly ash cement: a descriptive model Cement Concrete Res 35 2005 1204 1209 (Pubitemid 40710246)
12. A. Palomo, M.W. Grutzeck, and M.T. Blanco Alkali-activated fly ashes. a cement for future Cement Concrete Res 29 1999 1323 1329
13. J.G.S. Van Jaarsveld, J.S.J. Van Deventer, and L. Lorenzen The potential use of geopolymeric materials to immobilise toxic metals: Part I. Theory and applications Miner Eng 10 7 1997 659 669 (Pubitemid 127410591)
14. D.M. Roy Alkali-activated cements opportunities and challenges Cement Concrete Res 29 1999 249 254
15. Hardjito D, Rangan BV. Development and properties of low-calcium fly ash-based geopolymer concrete. In: Research report GC, 1, Australia 2005. Perth. Faculty of Engineering Curtim University of Technology; 2005. p. 1-94.
16. M. Hu, X. Zhu, and F. Long Alkali-activated fly ash-based geopolymers with zeolite or bentonite as additives Cem Concr Compos 31 10 2009 762 768
17. Silva FJ, Thaumaturgo C. Use of environmental scanning electron microscopy (ESEM) to study Alkali-activated pulverized fly-ash. In: The Brazilian conference on microscopy ff materials, MICROMAT 98 - ACTA MICROSCÓPICA, 6, Água de Lindóia, São Paulo (Brazil); 1998. p. 133-136.
18. K. Komnitsas, D. Zaharaki, and V. Perdikatsis Effect of synthesis parameters on the compressive strength of low-calcium ferronickel slag inorganic polymers J Hazard Mater 161 2009 760 768
19. American Society for testing and materials (ASTM). Standard specification for coal fly ash raw or calcined original pozzolan for use as a mineral admixture in concrete. ASTM C618/98. In: Annual book of ASTM, V. 04.02, Philadelphia; 1998.
20. Associaão brasileira de normas técnicas. NBR 7215: cimento Portland - determinaão da resistência compressão, Rio de Janeiro; 1996 [in Portuguese].
21. Associaão brasileira de normas técnicas. NBR MN 43: cimento Portland - determinaão da pasta de consistência normal, Rio de Janeiro; 2003 [in Portuguese].
22. Barbosa VFF. Síntese e caracterizaão de Polissialatos. Rio de Janeiro, Tese (Doutorado em Engenharia) - Departamento de Ciências dos Materiais, Instituto Militar de Engenharia (IME); 1999. p. 199 [in Portuguese].
23. A.S. Vargas, D.C.C. Dal Molin, J. Vilela Said, and J.P. Castro-Gomes Cinzas volantes álcali-ativadas com soluão combinada de NaOH e Ca(OH)2 Rev Matéria 12 3 2007 462 469
24. Fernández-Jiménez A, Palomo A. Alkali-activated fly ash concrete: alternative material for the precast industry. In: seminário geopolímeros - desenvolvimento recentes e suas aplicaões na engenharia, I. Vila Real, Portugal; 2004. p. 1-16.
25. T. Bakharev Geopolymeric materials prepared using class F fly ash elevated temperature curing Cem Concr Res 35 2005 1224 1232 (Pubitemid 40710249)
26. A. Fernández-Jiménez, and A. Palomo Composition and microstructure of alkali activated fly ash binder: effect of the activator Cem Concr Res 35 10 2005 1984 1992 (Pubitemid 41375779)
27. 2O ratio on the alkali activation of fly ash Cement Concrete Res 37 2007 671 679 (Pubitemid 46551021)