What question did this study set out to answer?

Determine optimal chemical ratios of SiO2/Al2O3 and Na2O/SiO2 to maximize the early mechanical strength and microstructure of room-temperature cured geopolymers.

January 1, 2025CerâmicaOpen Access

Using response surface analysis for the optimization of mechanical strength and microstructure of geopolymers with different SiO2/Al2O3 and SiO2/Na2O ratios

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Determine optimal chemical ratios of SiO2/Al2O3 and Na2O/SiO2 to maximize the early mechanical strength and microstructure of room-temperature cured geopolymers.
Designed a 3² factorial experiment evaluating two factors across three levels: sodium hydroxide concentration (5, 7.5, and 10 mol/L) and Na2SiO3-to-NaOH ratio (1:2, 1:1, and 2:1).
Synthesized aluminosilicate geopolymer specimens and tested mechanical properties after 7 days of room-temperature curing.
Compressive strength ranged from 4.46 MPa for the lowest SiO2/Al2O3 ratio to 41.14 MPa for the highest ratio.
The Na2SiO3/NaOH ratio served as the primary governing factor for strength development at an early curing age.

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Implication

Experimental study reveals optimal silicate-to-hydroxide ratios maximize early compressive strength in aluminosilicate geopolymers, suggesting a viable low-carbon alternative to traditional cement.

Cite This Study

Scolaro et al. (2025) studied this question.

synapsesocial.com/papers/6aa6a53c041e43fea73a7f53 https://doi.org/10.1590/smws5780

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Implication

Experimental study reveals optimal silicate-to-hydroxide ratios maximize early compressive strength in aluminosilicate geopolymers, suggesting a viable low-carbon alternative to traditional cement.

Using response surface analysis for the optimization of mechanical strength and microstructure of geopolymers with different SiO2/Al2O3 and SiO2/Na2O ratios

Key Points

Discussion

Implication

Cite This Study

Using response surface analysis for the optimization of mechanical strength and microstructure of geopolymers with different SiO2/Al2O3 and SiO2/Na2O ratios

Key Points

Discussion

Implication

Cite This Study