Supersulfated binders based on volcanic raw material: Optimization, microstructure and reaction products

Cabrera-Luna, K.; Maldonado-Bandala, Erick; Nieves-Mendoza, Demetrio; Escalante-Garcı́a, J.I.

doi:10.1016/j.conbuildmat.2018.05.024

Cited by 39 publications

(19 citation statements)

References 36 publications

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“…The An reflection peaks reveal low solubility and reactivity, which influenced a low amount of formed ettringite. This agrees with the presence of weak ettringite reflection peaks, suggesting that late-age strength development is mainly due to the formation of C-S-H according to (Cabrera-Luna et al, 2018). Figure 4 and Figure 5 show the microstructure of the C-3 concrete (5%An-10%PC-10%CaO-75%PM) for the T60 regime exposed to dry laboratory conditions at 25 °C (L) at 28 days and immersed in a 3.5% CaSO4 solution at 25 °C (S) at 90 days, respectively.…”

Section: Compressive Strengthsupporting

confidence: 83%

“…The standard deviation values of the averages were ±0.17-1.76 MPa. In general, it was observed that the chemical composition and initial curing influenced the strength development according to previous results (Cabrera-Luna et al, 2018). These factors favorably influenced the densification of the matrix, providing resistance to the calcium sulfate (Grounds et al, 2003).…”

Section: Compressive Strengthsupporting

confidence: 68%

“…Mehrotra et al, 1982;Dutta and Borthakur, 1990;Grounds et al, 1995;Taylor, 1998;Juenger et al, 2011) or calcium hydroxide and potassium hydroxide (Kamlet, 1960). Few investigations have studied SSCs composed of natural pozzolans (Cabrera-Luna et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…At 28 days of age, the concretes were exposed to dry laboratory conditions and immersed in a solution of 3.5% CaSO4. This study is part of research on volcanic-based SSC (Cabrera-Luna et al, 2018).…”

mentioning

confidence: 99%

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Resistance to compression and microstructure of concrete manufactured with supersulfated cements-based materials of volcanic origin exposed to a sulphate environment

Maldonado-Bandala

Luna²,

Escalante-Garcı́a

et al. 2018

Revista de la Asociación Latinoamericana de Control de Calidad,

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This research presents the results of concretes made with supersulfated cements (SSC) volcanic material bases. The concretes were cured under two regimes one for 24 h at 25 ° C and one for 22 h at 60 ° C and then at 25 ° C. The specimens were exposed to two conditions, dry under laboratory conditions and immersed in a solution with 3.5% CaSO 4 at 25 ° C for up to 180 days. After 180 days, the concrete with a 5% An-10% PC-10% CaO-75% PM cementant exposed to the CaSO4 solution achieved a compressive strength of 46 MPa and 44 MPa dry under conditions of laboratory. The microstructure was analyzed by scanning electron microscopy, energy dispersive spectroscopy and XRD, showing that the main hydration products are C-S-H and ettringite.

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Section: Compressive Strengthsupporting

confidence: 83%

Section: Compressive Strengthsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Resistance to compression and microstructure of concrete manufactured with supersulfated cements-based materials of volcanic origin exposed to a sulphate environment

Maldonado-Bandala

Luna²,

Escalante-Garcı́a

et al. 2018

Revista de la Asociación Latinoamericana de Control de Calidad,

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“…al., 2006). Los picos de ettringita fueron más intensos en la pasta S9 (75-10-1.25) con mayor contenido de Na2SO4 y consecuentemente con mayor formación de CaSO4 (50-8-1), indicando que una mayor cantidad de activador sulfático es importante para promover la formación de etringita (Cabrera-Luna et. al., 2018).…”

Section: Análisis De Difracción De Rayos Xunclassified

Cementos De Bajo Impacto Ambiental Por Activación Híbrida De Material Volcánico

López-Salas¹,

Garcia²

2019

Memorias Conpat 2019

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Se investigaron pastas de cementos híbridos base pumicita volcánica (Pum) alternativos al cemento Pórtland (CP) mediante un diseño de experimentos de superficie de respuesta. Los factores experimentales fueron la relación Pum:CP de 75:25 a 25:75, cantidad de activador %Na2SO4 (NS) de 4-12% y contenido de Ca(OH)2 (CH) en relaciones molares de 0.5-1.25. Los cementos con 25-50% Pum registraron creciente resistencia a la compresión con 31-43 MPa a los 28 días; mayor %Pum redujo la resistencia. Los activadores favorecieron las propiedades mecánicas, aunque mayores %NS no fueron los más efectivos. La caracterización por XRD, MEB y FTIR indicó formación de productos cementosos como silicatos de calcio hidratados y ettringita. Las partículas de Pum reaccionaron mediante disolución-precipitación y los cementos mostraron carácter hidráulico.

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The influence of two types of alkali activators on the microstructure and performance of supersulfated cement concrete： mitigating the strength and carbonation resistance

Zhou

Peng

Yao

et al. 2021

Cement and Concrete Composites

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Supersulfated binders based on volcanic raw material: Optimization, microstructure and reaction products

Cited by 39 publications

References 36 publications

Resistance to compression and microstructure of concrete manufactured with supersulfated cements-based materials of volcanic origin exposed to a sulphate environment

Resistance to compression and microstructure of concrete manufactured with supersulfated cements-based materials of volcanic origin exposed to a sulphate environment

Cementos De Bajo Impacto Ambiental Por Activación Híbrida De Material Volcánico

The influence of two types of alkali activators on the microstructure and performance of supersulfated cement concrete： mitigating the strength and carbonation resistance

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