Estudio de hormigones con incorporaciĆ³n de adiciones
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Fecha
2004
Autores
Profesor/a GuĆa
Facultad/escuela
Idioma
es
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Universidad AndrƩs Bello
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Licencia CC
Licencia CC
Resumen
Esta investigaciĆ³n tuvo como objetivo estudiar el comportamiento de hormigones, considerando el reemplazo de parte del cemento, por adiciones tales como puzolana, ceniza volante, microsĆlice y una ceniza proveniente del proceso de la celulosa, esta Ćŗltima es la primera vez que se empleaba para este fin.
Estos hormigones son comparados con un hormigĆ³n patrĆ³n preparado con cemento grado alta resistencia nacional.
El estudio analiza las resistencias de estos hormigones a la compresiĆ³n y sus costos comparativos.
Se concluye que hormigones preparados con cemento puro y adiciĆ³n, como una puzolana y las cenizas estudiadas, en cantidades de entre 25 a 30%, tienen comportamiento similar al hormigĆ³n preparado con cemento grado alta resistencia nacional, en cuanto a las resistencias a la compresiĆ³n y son mĆ”s econĆ³micos.
Se concluye ademĆ”s del estudio que la microsĆlice en porcentaje de 10%, segĆŗn las recomendaciones en el Ć”mbito nacional e internacional, mejora las resistencias a la compresiĆ³n de los hormigones, incluso sin el empleo en conjunto con un aditivo superplastificante.
This investigation had as objective to study the behaviour of concrete considering the replacement of part of the cement, by additions such as pozzolan, fly ash, silica fume and an ash coming from the cellulose process, the latter being employed for the first time for this objective. These concretes are compared to a standard concrete prepared with a high strength grade national cement. The study analyzes the compressive strength of these concretes and their comparative costs. The conclusion of this study is that concretes prepared with pure cement and addition, such as pozzolan and the studied ashes, in proportion between 25 to 30 percent, have similar behaviour to those concretes prepared with high strength grade national cement, in relation to compressive strength and they are cheaper. In addition it was concluded that the silica fume employed in proportion of 10 percent, as are the national and international recommendations, improves the concrete compressive strength, even without the employment of an plasticizer additive.
This investigation had as objective to study the behaviour of concrete considering the replacement of part of the cement, by additions such as pozzolan, fly ash, silica fume and an ash coming from the cellulose process, the latter being employed for the first time for this objective. These concretes are compared to a standard concrete prepared with a high strength grade national cement. The study analyzes the compressive strength of these concretes and their comparative costs. The conclusion of this study is that concretes prepared with pure cement and addition, such as pozzolan and the studied ashes, in proportion between 25 to 30 percent, have similar behaviour to those concretes prepared with high strength grade national cement, in relation to compressive strength and they are cheaper. In addition it was concluded that the silica fume employed in proportion of 10 percent, as are the national and international recommendations, improves the concrete compressive strength, even without the employment of an plasticizer additive.
Notas
Tesis (Constructor Civil)
Palabras clave
HormigĆ³n, Aditivos, Pruebas