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Durabilidad de los cementos de ceniza volante activados alcalinamente

Authors: Palomo, Ángel; Fernández-Jiménez, Ana;

Durabilidad de los cementos de ceniza volante activados alcalinamente

Abstract

[ES] En este trabajo se realiza un estudio comparativo del comportamiento durable frente a diferentes tipos de agresión de un cemento comercial (sistema de referencia) y un nuevo material cementante elaborado mediante la mezcla de ceniza volante con una disolución de NaOH 8M (sin OPC). En concreto se realizaron estudios para determinar la durabilidad frente a diferentes disoluciones agresivas (agua desionizada, agua de mar, disolución de sulfato sódico 4,4%, disolución de HCl 0.1N), durabilidad frente a la reacción sílice-álcali, así como su comportamiento a elevadas temperaturas. Los principales parámetros estudiados fueron: perdidas de peso, resistencias mecánicas a compresión, variaciones de volumen, identificación de los productos de degradación y observación de cambios micro-estructurales.

[EN] The study described in the present paper addresses the comparative durability behaviour between a new cementitious material made from alkali-activated fly ash (AAFA) with 8M NaOH solution and an ordinary Portland cement (reference system) under different conditions. Cements performance was observed in a number of aggressive environments (deionized water, ASTM seawater, 4.4% sodium sulphate solution and acidic solutions 0.1NHCl); additionally durability respect to alkali-silica reaction and the behaviour at high temperature was also studied. The chief parameters under control were: weight loss, compressive strength, variations in volume, presence of the products of degradation and microstructural changes.

Comunicación presentada en las II Jornadas de Investigación en Construcción: "60 años de Informes de la Construcción", celebradas los pasados 22, 23 y 24 de mayo de 2008 en el Instituto "Eduardo Torroja" de Ciencias de la Construcción (IETCC-CSIC) de Madrid.

Peer reviewed

Keywords

Ordinary Portland cement, Durability studies, Microstructural analysis, Análisis microstructural, Procesos de degradación, High temperatures, Cementos de ceniza volante, Degradation processes, Aggresive solutions, Reacción sílice-álcali, Cemento comercial, Alkali-silica reaction, Temperaturas elevadas, Disoluciones agresivas, Fly ash cements, Estudio de durabilidad

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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