Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas)
Silica fume (SF) or microsilica is related mainly with preparation of High Resistance Concrete. This has justified its use -together with portland cement (I-42'5/SR,MR) and an superfiuidifying additive- in the preparation of a concrete whose value for compressive mechanical resistance at early...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
1998-12-01
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| Series: | Materiales de Construccion |
| Online Access: | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/464 |
| _version_ | 1818943717990465536 |
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| author | M. R. Bollati R Talero F. Hernández Olivares |
| author_facet | M. R. Bollati R Talero F. Hernández Olivares |
| author_sort | M. R. Bollati |
| collection | DOAJ |
| description | Silica fume (SF) or microsilica is related mainly with preparation of High Resistance Concrete. This has justified its use -together with portland cement (I-42'5/SR,MR) and an superfiuidifying additive- in the preparation of a concrete whose value for compressive mechanical resistance at early ages (only 5 to 10 hours) is higher than 40 kp/cm2, instead of preparing it with the portland cement plus a setting accelerator or "model" dosage.
The experimental techniques used to reach that objective have been: ultrasound energy and a press for breaking 30 x 15 mm specimens, and a maximum load of 2001. With the first technique, in only 25 days, 13 different dossages were prepared, which were compared to the "model" dosage, and two more that did not contain neither setting accelerator nor SF, this means that they had been prepared with the same portland cement, same fine and coarse aggregates and the same consistency, and that they would act as "reference" for all previous ones.
In such a way the dosage was found: E, in this case, that was the same as the "model" as for the amount of fine and coarse aggregates, but not as for the amount of the portland cement used which this time was 360 kg/m3 instead of 400kg/m3 SF content 40 kg/m3 and water 144 l/m3 |
| first_indexed | 2024-12-20T07:31:46Z |
| format | Article |
| id | doaj.art-fbe8566cca174cabb371f4325898f8d5 |
| institution | Directory Open Access Journal |
| issn | 0465-2746 1988-3226 |
| language | English |
| last_indexed | 2024-12-20T07:31:46Z |
| publishDate | 1998-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj.art-fbe8566cca174cabb371f4325898f8d52022-12-21T19:48:24ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32261998-12-0148252616610.3989/mc.1998.v48.i252.464446Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas)M. R. Bollati0R Talero1F. Hernández Olivares2Instituto de Ciencias de la Construcción Eduardo Torroja-CSICInstituto de Ciencias de la Construcción Eduardo Torroja-CSICE. T. S. de Arquitectura de MadridSilica fume (SF) or microsilica is related mainly with preparation of High Resistance Concrete. This has justified its use -together with portland cement (I-42'5/SR,MR) and an superfiuidifying additive- in the preparation of a concrete whose value for compressive mechanical resistance at early ages (only 5 to 10 hours) is higher than 40 kp/cm2, instead of preparing it with the portland cement plus a setting accelerator or "model" dosage. The experimental techniques used to reach that objective have been: ultrasound energy and a press for breaking 30 x 15 mm specimens, and a maximum load of 2001. With the first technique, in only 25 days, 13 different dossages were prepared, which were compared to the "model" dosage, and two more that did not contain neither setting accelerator nor SF, this means that they had been prepared with the same portland cement, same fine and coarse aggregates and the same consistency, and that they would act as "reference" for all previous ones. In such a way the dosage was found: E, in this case, that was the same as the "model" as for the amount of fine and coarse aggregates, but not as for the amount of the portland cement used which this time was 360 kg/m3 instead of 400kg/m3 SF content 40 kg/m3 and water 144 l/m3http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/464 |
| spellingShingle | M. R. Bollati R Talero F. Hernández Olivares Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas) Materiales de Construccion |
| title | Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas) |
| title_full | Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas) |
| title_fullStr | Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas) |
| title_full_unstemmed | Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas) |
| title_short | Preparación de la dosificación de un hormigón con humo de sílice, cuya RMC sea > 40 kp/cm2, a edades iniciales (5-10 horas) |
| title_sort | preparacion de la dosificacion de un hormigon con humo de silice cuya rmc sea 40 kp cm2 a edades iniciales 5 10 horas |
| url | http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/464 |
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