This paper presents observations made on the use of self-compacting concrete for pre-cast elements at Byggebjerg Beton A/S during the last 3 years. The elements include L- and sandwich elements and are mainly produced for agriculture purposes. In general, the flow properties and air content are very sensitive to small variations in temperature, aggregate size distribution, and moisture content. For instance, the air content seems to decrease as the temperature increases. For vertical form filling applications it is important to adjust the filling technique according to the properties of the concrete to achieve a good surface quality with a limited number of blowholes. For horizontal castings it is important to keep the concrete flowing to avoid casting joints. Blocking is avoided by using the right type of spacers and a maximum size aggregate of 8mm. However, if the concrete has to flow over longer distances blocking may become a problem.
|Title of host publication||Proceedings of the Nordic Mini Seminar on Form Filling Ability of SCC|
|Publication status||Published - 2004|
|Event||Nordic Mini Seminar on Form Filling Ability of SCC - Taastrup, Denmark|
Duration: 1 Jan 2004 → 1 Jan 2004
|Seminar||Nordic Mini Seminar on Form Filling Ability of SCC|
|Period||01/01/2004 → 01/01/2004|
|Other||No exact date found but held in 2004|