Railway sleepers made of alkali activated fly ash concrete

Nowadays, the tracks that comprise the world railway network are estimated to contain nearly three billion sleepers, over 400 million of which are made of concrete. At the same time, over 50% of the world demand for sleepers (around 20 million units per year) was for the concrete version; and betwee...

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Autores principales:	Palomo,Ángel, Fernández Jiménez,Ana, López Hombrados,Cecilio, Lleyda,José Luis
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Departamento de Ingeniería y Gestión de la Construcción 2007
Materias:	Fly ash alkaline activation new concrete sleepers
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-50732007000200001
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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spelling	oai:scielo:S0718-507320070002000012007-09-27Railway sleepers made of alkali activated fly ash concretePalomo,ÁngelFernández Jiménez,AnaLópez Hombrados,CecilioLleyda,José Luis Fly ash alkaline activation new concrete sleepers Nowadays, the tracks that comprise the world railway network are estimated to contain nearly three billion sleepers, over 400 million of which are made of concrete. At the same time, over 50% of the world demand for sleepers (around 20 million units per year) was for the concrete version; and between 2% and 5% of the concrete ties that are laid on tracks every year are to replace or renew worn elements. Concrete durability, however, depends on many factors. And in this context it should be noted that the characteristics of the in-plant industrial process involved in manufacturing precast concrete units differs in a number of ways from in situ construction, vesting these units with properties that distinguish them, in terms of durability, from in situ concrete under the conditions generally prevailing on construction sites. Generally speaking, it is widely admitted that the activation process of fly ashes allows obtaining a material with similar cementing features to those characterising Ordinary Portland Cement. Actually, the alkali activation of fly ashes is a singular procedure by which the powder originated in the power plants is mixed with certain alkaline dissolution and cured under a certain temperature to make solid materials. Contrary to conventional concrete, however, this new type of concrete can attain high strength over a very short time (1 day) and do develop excellent durability propertiesinfo:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Departamento de Ingeniería y Gestión de la ConstrucciónRevista ingeniería de construcción v.22 n.2 20072007-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-50732007000200001en10.4067/S0718-50732007000200001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Fly ash alkaline activation new concrete sleepers
spellingShingle	Fly ash alkaline activation new concrete sleepers Palomo,Ángel Fernández Jiménez,Ana López Hombrados,Cecilio Lleyda,José Luis Railway sleepers made of alkali activated fly ash concrete
description	Nowadays, the tracks that comprise the world railway network are estimated to contain nearly three billion sleepers, over 400 million of which are made of concrete. At the same time, over 50% of the world demand for sleepers (around 20 million units per year) was for the concrete version; and between 2% and 5% of the concrete ties that are laid on tracks every year are to replace or renew worn elements. Concrete durability, however, depends on many factors. And in this context it should be noted that the characteristics of the in-plant industrial process involved in manufacturing precast concrete units differs in a number of ways from in situ construction, vesting these units with properties that distinguish them, in terms of durability, from in situ concrete under the conditions generally prevailing on construction sites. Generally speaking, it is widely admitted that the activation process of fly ashes allows obtaining a material with similar cementing features to those characterising Ordinary Portland Cement. Actually, the alkali activation of fly ashes is a singular procedure by which the powder originated in the power plants is mixed with certain alkaline dissolution and cured under a certain temperature to make solid materials. Contrary to conventional concrete, however, this new type of concrete can attain high strength over a very short time (1 day) and do develop excellent durability properties
author	Palomo,Ángel Fernández Jiménez,Ana López Hombrados,Cecilio Lleyda,José Luis
author_facet	Palomo,Ángel Fernández Jiménez,Ana López Hombrados,Cecilio Lleyda,José Luis
author_sort	Palomo,Ángel
title	Railway sleepers made of alkali activated fly ash concrete
title_short	Railway sleepers made of alkali activated fly ash concrete
title_full	Railway sleepers made of alkali activated fly ash concrete
title_fullStr	Railway sleepers made of alkali activated fly ash concrete
title_full_unstemmed	Railway sleepers made of alkali activated fly ash concrete
title_sort	railway sleepers made of alkali activated fly ash concrete
publisher	Pontificia Universidad Católica de Chile. Departamento de Ingeniería y Gestión de la Construcción
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-50732007000200001
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Railway sleepers made of alkali activated fly ash concrete

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