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Title: | Valorización de residuos agroindustriales incinerados como adición puzolánica. Estudio comparativo con el humo de sílice español |
Other Titles: | Re-use of incinerated agro-industrial waste as pozzolanic addition. Comparison with spanish silica fume | Authors: | Talero Morales, Rafael; Pedrajas, C.; Delgado Quiñones, Alberto | Keywords: | Cenizas agroindustriales Adiciones puzolánicas Humo de sílice Cementos Pórtland Ataque sulfático Agro-industrial ashes Pozzolanic additions Microsilica Portland cement Sulfate attack |
Issue Date: | 30-Dec-2009 | Publisher: | Consejo Superior de Investigaciones Científicas (España) | Citation: | Materiales de Construcción 59(296): 53-89 (2009) | Abstract: | [ES] Este trabajo ha tenido por objetivo determinar la viabilidad
de uso de dos residuos agroindustriales incinerados,
cenizas C1 y C2, como posibles adiciones puzolánicas
artificiales, para fabricar cementos y/o de sus
productos derivados, hormigones y morteros tradicionales
y especiales, principalmente; de aquí su estudio
comparativo con el humo de sílice español, HS. Y la conclusión
que se obtuvo fue que las dos cenizas pueden
ser consideradas como adiciones puzolánicas artificiales
con carácter químico silícico cierto, pero sólo una, la C2,
podría llegar a ser considerada como “microsílice”, porque
su pérdida por calcinación se encuentra dentro de
su límite permitido. En cambio la C1, no, porque dicha
pérdida fue demasiado elevada, aún cuando, su contenido
de sílice reactiva, SiO2r-, era mayor por lo que en
su caracterización química y sulfática se mostró más
cercano al del HS que la C2. Finalmente se ha podido
justificar también que, la adopción de cualquier método
de ensayo para determinar la resistencia potencial a los
sulfatos de los cementos portland con filler calizo carece
de sentido. [EN] This study attempted to determine the viability of using incinerated agro-industrial waste, ashes C1 and C2, as possible artificial pozzolanic additions in traditional and highperformance concretes and mortars, mainly, and for this reason, a comparative study was likewise conducted with Spanish silica fume (HS). The conclusion drawn from the findings was that the two ashes used could be regarded to be centainly, silicic artificial pozzolanic additions but only C2, which had a higher SiO2 content, could be regarded to be a “microsilica”, however, because its loss on ignition, L.O.I., fell within the acceptable range of variability. In contrast, C1 could not be so regarded because its L.O.I. was too high, despite its higher reactive silica SiO2r- content. For this reason, ash C1 had to be ruled out for any of the proposed uses, even though in terms of chemical and sulfatic characterization it was closer to HS than C2. By contrast, the mechanical strength values of C2 and HS were comparable, making the former initially acceptable for any of such uses. Finally, it has also been justified that, adoption of any method of trial to determine potential resistance to the sulfates of the Portland cements with calcareous filler lacks of sense. |
Description: | 37 páginas, 5 figuras, 6 tablas. | Publisher version (URL): | http://dx.doi.org/10.3989/mc.2009.49809 | URI: | http://hdl.handle.net/10261/19927 | DOI: | 10.3989/mc.2009.49809 | ISSN: | 0465-2746 | E-ISSN: | 1988-3226 |
Appears in Collections: | (IETCC) Artículos |
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