Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water

S. Goñi; M. Frías; R. Vigil De La Villa; I. Vegas

doi:10.1016/j.cemconcomp.2013.04.002

Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water

S. Goñi^*
, M. Frías
, R. Vigil De La Villa
, I. Vegas

^*Autor correspondiente de este trabajo

Generales

CSIC - Instituto de Ciencias de la Construcción Eduardo Torroja (IETCC)
Universidad Autónoma de Madrid

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

17 Citas (Scopus)

Resumen

Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca²⁺ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.

Idioma original	Inglés
Páginas (desde-hasta)	1-6
Número de páginas	6
Publicación	Cement and Concrete Composites
Volumen	40
DOI	https://doi.org/10.1016/j.cemconcomp.2013.04.002
Estado	Publicada - jul 2013

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10.1016/j.cemconcomp.2013.04.002

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title = "Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water",

abstract = "Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.",

keywords = "Leaching of calcium, Plain ordinary Portland cement (OPC), Pore-size distribution, Pure water, Scanning electron microscopy (SEM), Ternary Portland cement (TPC)",

author = "S. Go{\~n}i and M. Fr{\'i}as and \{De La Villa\}, \{R. Vigil\} and I. Vegas",

year = "2013",

month = jul,

doi = "10.1016/j.cemconcomp.2013.04.002",

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volume = "40",

pages = "1--6",

journal = "Cement and Concrete Composites",

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TY - JOUR

T1 - Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water

AU - Goñi, S.

AU - Frías, M.

AU - De La Villa, R. Vigil

AU - Vegas, I.

PY - 2013/7

Y1 - 2013/7

N2 - Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.

AB - Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.

KW - Leaching of calcium

KW - Plain ordinary Portland cement (OPC)

KW - Pore-size distribution

KW - Pure water

KW - Scanning electron microscopy (SEM)

KW - Ternary Portland cement (TPC)

UR - https://www.scopus.com/pages/publications/84877851554

U2 - 10.1016/j.cemconcomp.2013.04.002

DO - 10.1016/j.cemconcomp.2013.04.002

M3 - Article

AN - SCOPUS:84877851554

SN - 0958-9465

VL - 40

SP - 1

EP - 6

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

ER -

Decalcification of activated paper sludge - Fly ash-Portland cement blended pastes in pure water

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