A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of sodium hydroxide concentration on strength and microstructure of alkali-activated natural pozzolan and limestone powder mortar
https://orcid.org/0000-0002-9718-6766
https://orcid.org/0000-0002-0264-6476
Highlights Effect of NaOH(aq) concentration on workability and strength of AANL mortar was studied. AANL mortar strength increases with NaOH(aq) concentration (4–10 M) The developed AANL mortar exhibited a 90-day compressive strength of 31.3 MPa. NaOH(aq) concentrations influences microstructural characteristics of the AANL mortar.
Abstract The present study evaluates the effect of sodium hydroxide concentrations on strength, bond properties, reaction products and the microstructures of binary blended alkali-activated volcanic natural pozzolan and limestone powder (AANL) mortar. Six AANL mortar were prepared with alkaline activators of 4–14 M NaOH(aq) and Na2SiO3(aq) such that the activators ratio was 1:1. Curing was done at 75 °C for 24 h duration. The maximum 90-day compressive strength of 31.3 MPa was achieved with 10 M NaOH(aq) while 76% of the strength could be achieved within three days when 10 M NaOH was used. The 28-day tensile strength of 2.32 MPa was achieved with 14 M NaOH(aq). XRD characterizations revealed that activation with a strong concentration of sodium hydroxide (10 M NaOH(aq)) led to the formation of anorthite (CaAl2Si2O8) and gehlenite (Ca0.Al2O3SiO2). SEM + EDX indicated that strong alkali (10 M NaOH) enhanced microstructural density compared to that of mild alkali (4 M NaOH(aq)).
Effect of sodium hydroxide concentration on strength and microstructure of alkali-activated natural pozzolan and limestone powder mortar
https://orcid.org/0000-0002-9718-6766
https://orcid.org/0000-0002-0264-6476
Highlights Effect of NaOH(aq) concentration on workability and strength of AANL mortar was studied. AANL mortar strength increases with NaOH(aq) concentration (4–10 M) The developed AANL mortar exhibited a 90-day compressive strength of 31.3 MPa. NaOH(aq) concentrations influences microstructural characteristics of the AANL mortar.
Abstract The present study evaluates the effect of sodium hydroxide concentrations on strength, bond properties, reaction products and the microstructures of binary blended alkali-activated volcanic natural pozzolan and limestone powder (AANL) mortar. Six AANL mortar were prepared with alkaline activators of 4–14 M NaOH(aq) and Na2SiO3(aq) such that the activators ratio was 1:1. Curing was done at 75 °C for 24 h duration. The maximum 90-day compressive strength of 31.3 MPa was achieved with 10 M NaOH(aq) while 76% of the strength could be achieved within three days when 10 M NaOH was used. The 28-day tensile strength of 2.32 MPa was achieved with 14 M NaOH(aq). XRD characterizations revealed that activation with a strong concentration of sodium hydroxide (10 M NaOH(aq)) led to the formation of anorthite (CaAl2Si2O8) and gehlenite (Ca0.Al2O3SiO2). SEM + EDX indicated that strong alkali (10 M NaOH) enhanced microstructural density compared to that of mild alkali (4 M NaOH(aq)).
Effect of sodium hydroxide concentration on strength and microstructure of alkali-activated natural pozzolan and limestone powder mortar
https://orcid.org/0000-0002-9718-6766
https://orcid.org/0000-0002-0264-6476
Highlights Effect of NaOH(aq) concentration on workability and strength of AANL mortar was studied. AANL mortar strength increases with NaOH(aq) concentration (4–10 M) The developed AANL mortar exhibited a 90-day compressive strength of 31.3 MPa. NaOH(aq) concentrations influences microstructural characteristics of the AANL mortar.
Abstract The present study evaluates the effect of sodium hydroxide concentrations on strength, bond properties, reaction products and the microstructures of binary blended alkali-activated volcanic natural pozzolan and limestone powder (AANL) mortar. Six AANL mortar were prepared with alkaline activators of 4–14 M NaOH(aq) and Na2SiO3(aq) such that the activators ratio was 1:1. Curing was done at 75 °C for 24 h duration. The maximum 90-day compressive strength of 31.3 MPa was achieved with 10 M NaOH(aq) while 76% of the strength could be achieved within three days when 10 M NaOH was used. The 28-day tensile strength of 2.32 MPa was achieved with 14 M NaOH(aq). XRD characterizations revealed that activation with a strong concentration of sodium hydroxide (10 M NaOH(aq)) led to the formation of anorthite (CaAl2Si2O8) and gehlenite (Ca0.Al2O3SiO2). SEM + EDX indicated that strong alkali (10 M NaOH) enhanced microstructural density compared to that of mild alkali (4 M NaOH(aq)).
Effect of sodium hydroxide concentration on strength and microstructure of alkali-activated natural pozzolan and limestone powder mortar
Adewumi, Adeshina Adewale (author) / Ariffin, Mohd Azreen Mohd (author) / Yusuf, Moruf Olalekan (author) / Maslehuddin, Mohammed (author) / Ismail, Mohammad (author)
2020-10-27
Article (Journal)
Electronic Resource
English
Strength and microstructure of alkali-activated natural pozzolan and limestone powder mortar
| DOAJ | 2019
Acid Resistance of Alkali-Activated Natural Pozzolan and Limestone Powder Mortar
| DOAJ | 2022
Inexpensive intumescent alkali-activated natural pozzolan pastes
| Tema Archive | 2015
Engineering Properties of Alkali-Activated Natural Pozzolan Concrete
| British Library Online Contents | 2011
Engineering Properties of Alkali-Activated Natural Pozzolan Concrete
| Online Contents | 2011