| Autor: |
Mukai, David J., Altan, Simten, Ehrgott, John Q. |
| Zdroj: |
Transportation Research Record; January 2000, Vol. 1698 Issue: 1 p61-69, 9p |
| Abstrakt: |
The researchers’ primary objective was to evaluate the early-strength characteristics of self-compacting concrete (SCC), which is a type of concrete that can be placed without external vibration, even in congested areas. Two unique characteristics of SCC are its high-percentage substitution of cement with fly ash or slag cement, or with both fly ash and slag cement and a relatively high superplasticizer dosage. Both of these characteristics retard early-strength gain. The impetus was to develop self-compacting concrete with an early strength suitable for precast applications. The major findings are that it is possible to proportion SCC mixtures with high early strength (30 MPa at 16 h under steam curing) and that high slump does not necessarily correlate with self-compaction. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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