Effect of different high surface area silicas on the rheology of cement paste

Autor: J. I. Tobón, O. Mendoza, O. J. Restrepo, M. V. Borrachero, J. Payá

Publikováno v: Materiales de Construccion, Vol 70, Iss 340, Pp e231-e231 (2020)

This work studies the effect of nanosilica (NS) on the rheology of cement paste by comparing it with two high specific surface area silicas: silica fume (SF) and pyrogenic silica (PS). Portland cement pastes were produced with different water-to-ceme

Externí odkaz: https://doaj.org/article/dcf65b4e86564136b6886838d985a917

Urban structure degradation caused by growth of plants and microbial activity

Autor: E. Mejía, J. I. Tobón, W. Osorio

Publikováno v: Materiales de Construccion, Vol 69, Iss 333, Pp e177-e177 (2019)

The purpose of this study was to isolate microorganisms associated to surface-affected concrete structures and to measure the in vitro dissolution of concrete based on the release of elements such as calcium and silicon. Although many microorganisms

Externí odkaz: https://doaj.org/article/dcc7a25490cc40b19ae7ce6153fd5a85

Optimal fluorite/gypsum mineralizer ratio in Portland cement clinkering

Autor: J. I. Tobón, M. F. Díaz-Burbano, O. J. Restrepo-Baena

Publikováno v: Materiales de Construccion, Vol 66, Iss 322, Pp e086-e086 (2016)

This paper presents an analysis of the joint effect of fluorite and gypsum as mineralizers in the manufacture of Portland cement. A laboratory- scale Box-Behnken statistical design was used to quantify the effects of the explanatory variables fluorit

Externí odkaz: https://doaj.org/article/bebe7ac9de4a4aea8320751b54fd22f3

COMPARATIVE ANALYSIS OF PERFORMANCE OF PORTLAND CEMENT BLENDED WITH NANOSILICA AND SILICA FUME

Autor: J. I TOBÓN, O. J RESTREPO, J. PAYÁ

Publikováno v: Dyna, Vol 77, Iss 163, Pp 37-46 (2010)

In this paper some physical properties of Colombian Portland cement type III replaced with nanosilica in percentages of 1, 3, 5 and 10% were evaluated. Main determined properties were fluidity, normal consistency, setting times, heat of hydration and

Externí odkaz: https://doaj.org/article/93beb6dcc0ab42fd804a8efb793ecd79

Efecto de diferentes sílices de alta área superficial sobre la reología de pastas de cemento

Autor: J. I. Tobón, O. Mendoza, O. J. Restrepo, M. V. Borrachero, J. Payá

Publikováno v: Materiales de Construcción; Vol. 70 No. 340 (2020); e231
Materiales de Construcción; Vol. 70 Núm. 340 (2020); e231
Materiales de Construcción
Consejo Superior de Investigaciones Científicas (CSIC)
Materiales de Construccion, Vol 70, Iss 340, Pp e231-e231 (2020)
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
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[ES] Efecto de diferentes sílices de alta área superficial sobre la reología de pastas de cemento. Este tra¬bajo estudia el efecto de la nanosílice (NS) sobre la reología de pastas de cemento por comparación con sílices de alta área superfic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4bd5c19c26783871e9a3cba675f96f1
https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2301