Escudo de la República de Colombia
Sistema Nacional de Biliotecas - Repositorio Institucional Universidad Nacional de Colombia Biblioteca Digital - Repositorio Institucional UN Sistema Nacional de Bibliotecas UN

Effect of cationic polyelectrolytes addition in cement cohesion

Zuluaga-Hernández, Edison Albert and Hoyos, Bibian A. (2014) Effect of cationic polyelectrolytes addition in cement cohesion. Dyna; Vol. 81, núm. 188 (2014); 222-228 DYNA; Vol. 81, núm. 188 (2014); 222-228 2346-2183 0012-7353 .

Texto completo

[img]
Vista previa
PDF
993kB
[img]
Vista previa
PDF
53kB

URL oficial: http://revistas.unal.edu.co/index.php/dyna/article...

Resumen

Here is studied the variation in cohesion of cement main phase (C-S-H) as a result of cationic polyelectrolytes addition (quaternary amines spermine and norspermidine). Cohesion study was carried out by molecular simulation techniques (Monte Carlo) using a primitive model in a canonical ensemble (NVT). The proposed model takes into account the influence of ionic size of each particle and the addition of polyelectrolytes with different charge number and separation. The results obtained show that electrostatic interactions are responsible for the cohesion of the hardened cement. It was found that in absence of cationic polyelectrolytes, cohesion is lost when the C-S-H lamellae are at separations larger than 1 nm. Adding cationic polyelectrolytes generates a distribution of hydroxide ions around the polyelectrolyte charges, facilitates the distribution of calcium and sodium ions in the entire space between C-S-H surfaces; this allows the cohesive forces exist at greater distances of separation between the surfaces.

Tipo de documento:Artículo - Article
Información adicional:Derechos de autor reservados
Palabras clave:cement cohesion, molecular simulation, cationic polyelectrolytes, osmotic pressure, primitive model.
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:46872
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :07 Febrero 2015 08:59
Ultima modificación:27 Noviembre 2017 22:08
Ultima modificación:27 Noviembre 2017 22:08
Exportar:Clic aquí
Estadísticas:Clic aquí
Compartir:

Solamente administradores del repositorio: página de control del ítem

Vicerrectoría de Investigación: Número uno en investigación
Indexado por:
Indexado por Scholar Google WorldCat DRIVER Metabiblioteca OAIster BASE BDCOL Registry of Open Access Repositories SNAAC Red de repositorios latinoamericanos eprints Open archives La referencia Tesis latinoamericanas OpenDOAR CLACSO
Este sitio web se ve mejor en Firefox