Investigation of the reaction mechanism of blended fly ash and rice husk ash alkali-activated binders

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Sarah Fernando ◽  
Chamila Gunasekara ◽  
David W. Law ◽  
M. C. M. Nasvi ◽  
Sujeeva Setunge ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Fly Ash ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkali Activated Binders ◽  
Alkali Activated

Life cycle assessment and cost analysis of fly ash–rice husk ash blended alkali-activated concrete

2021 ◽  
Vol 295 ◽  
pp. 113140
Author(s):  
Sarah Fernando ◽  
Chamila Gunasekara ◽  
David W. Law ◽  
M.C.M. Nasvi ◽  
Sujeeva Setunge ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Fly Ash ◽  
Cost Analysis ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkali Activated Concrete ◽  
Alkali Activated

Systematic Review on Alkali-Activated Binders Blended with Rice Husk Ash

2021 ◽  
Vol 33 (9) ◽  
pp. 04021229
Author(s):  
Sarah Fernando ◽  
M. C. M. Nasvi ◽  
Chamila Gunasekara ◽  
David W. Law ◽  
Sujeeva Setunge ◽  
...  
Keyword(s):  
Systematic Review ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkali Activated Binders ◽  
Alkali Activated

Refluxed rice husk ash/NaOH suspension for preparing alkali activated binders

2014 ◽  
Vol 115 ◽  
pp. 72-74 ◽  
Author(s):  
N. Bouzón ◽  
J. Payá ◽  
M.V. Borrachero ◽  
L. Soriano ◽  
M.M. Tashima ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkali Activated Binders ◽  
Alkali Activated

scholarly journals The Influence of Rice Husk Ash Addition on the Properties of Metakaolin-Based Geopolymers

2016 ◽  
Vol 10 (1) ◽  
pp. 406-417 ◽  
Author(s):  
Paulo H. R. Borges ◽  
Vitor A. Nunes ◽  
Tulio H. Panzera ◽  
Giorgio Schileo ◽  
Antonio Feteira
Keyword(s):  
Fourier Transform ◽  
Flexural Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Plastic Behavior ◽  
High Deformation ◽  
Molar Ratios ◽  
Geopolymer Matrix ◽  
Alkali Activated Binders ◽  
Alkali Activated

This paper investigates the replacement of metakaolin (MK) with rice husk ash (RHA) in the production of alkali-activated binders or geopolymers. The influence of the RHA addition on compressive and flexural strength, as well as water absorption and apparent porosity were determined, in terms of the percentage of RHA in the mixture and molar ratios of the mixes. Fourier Transform Infrared (FTIR) spectroscopy and Energy Dispersive spectroscopy (EDS) were carried out to assess the changes in the microstructure of the geopolymer matrices with the RHA addition. Results have shown that RHA may be a supplementary precursor for geopolymers. The composition of the geopolymer matrices containing 0-40% RHA is very similar, which indicates that the additional Si provided by RHA is not incorporated to the geopolymer matrix. In addition, geopolymers with RHA content higher than 40% present a plastic behavior, characterized by extremely low strength and high deformation, which can be attributed to the formation of silica gel in formulations containing variable Si/Al ratio.

scholarly journals Effect of CaSO4 Incorporation on Pore Structure and Drying Shrinkage of Alkali-Activated Binders

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1673 ◽  
Author(s):  
Hyeongmin Son ◽  
Sol Moi Park ◽  
Joon Ho Seo ◽  
Haeng Ki Lee
Keyword(s):  
Fly Ash ◽  
Pore Structure ◽  
Drying Shrinkage ◽  
Phase Changes ◽  
X Ray Diffraction ◽  
Activated Slag ◽  
Capillary Tension ◽  
Alkali Activated Binders ◽  
Internal Pore Structure ◽  
Alkali Activated

This present study investigates the effects of CaSO4 incorporation on the pore structure and drying shrinkage of alkali-activated slag and fly ash. The slag and fly ash were activated at a 5:5 ratio by weighing with a sodium silicate. Thereafter, 0%, 5%, 10%, and 15% of CaSO4 were incorporated to investigate the changes in phase formation and internal pore structure. X-Ray Diffraction (XRD), thermogravimetry (TG)/derivative thermogravimetry (DTG), mercury intrusion porosimetry (MIP), nuclear magnetic resonance (NMR), and drying shrinkage tests were carried out to find the correlation between the pore structure and drying shrinkage of the specimens. The results showed that CaSO4 incorporation increased the formation of thenardite, and these phase changes affected the pore structure of the activated fly ash and slag. The increase in the CaSO4 content increased the pore distribution in the mesopore. As a result, the capillary tension and drying shrinkage decreased.

Effect of rice husk ash-derived activator on the structural build-up of alkali activated materials

2021 ◽  
Vol 150 ◽  
pp. 106590
Author(s):  
Mohammed Fouad Alnahhal ◽  
Abdelrahman Hamdan ◽  
Ailar Hajimohammadi ◽  
Taehwan Kim
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkali Activated
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