RESUMEllEn este trabajo se presentan resultados de propiedades tales como resistencia a la compresion y fluidez en mortero. Adicionalmente, consistencia, tiempo de fraguado y viscosidad en pastas. Todas estas propiedades fueron evaluadas con la adiciOn de una puzolana artificial como es la ceniza de cascarilla de arroz (CCA), la cual es un sub producto agroindustrial de una arrocera colombiana. La CCA se obtuvo a partir de un proceso termico y de molienda.Palabras ClavEs: Ceniza de cascarilla de arroz (CCA), puzolana, Reologia.
AbstractIn the present paper, the results of properties such as compression strength and fluidity in mortar; along with consistency, setting times and viscosity in pastes are shown. All these properties were tested with the addition of an artificial pozzolan like rice husk ash (RHA), which is an agro industrial by product of a Colombian rice processor. The RHA was obtained from a thermal and milling process.
PACS 81.05. Mh, 81.05.Rm In this study, the effect of chemical and thermal treatment on the pozzolanic properties of rice husk ash (RHA) was investigated. The rice husks were subjected to chemical and thermal treatments. After the chemical treatment, the husks were burned under controlled conditions in order to obtain amorphous silica to be used as a pozzolanic material. Finally the ash obtained was milled in a ball mill to reduce the size of the particles. All the products obtained were characterized in terms of silica content, amorphous character, particle size distribution, and pozzolanic activity. The ash produced after an acid treatment with HCl to the husks produced a high percentage of ash with amorphous silica; high fineness, purity, and pozzolanic activity. The silica obtained was incorporated to cement pastes and concretes to evaluate the mechanical, rheological and durability properties.
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