Self consolidating concrete test set
is a concrete mix which has a low yield stress, high deformability, good segregation resistance (prevents separation of particles in the mix), and moderate viscosity (necessary to ensure uniform suspension of solid particles during transportation, placement (without external compaction), and thereafter until the concrete sets).
In everyday terms, when poured, SCC is an extremely fluid mix with the following distinctive practical features – it flows very easily within and around the formwork, can flow through obstructions and around corners ("passing ability"), is close to self-leveling (although not actually self-levelling), does not require vibration or tamping after pouring, and follows the shape and surface texture of a mold (or form) very closely once set.
The relatively high cost of material used in such concrete continues to hinder its widespread use in various segments of the construction industry, including commercial construction, however the productivity economics take over in achieving favorable performance benefits and works out to be economical in pre-cast industry.The fine aggregates with particle size less than 0.125mm are generally employed.The quality of water used is same that followed for reinforced concrete and prestressed concrete construction.However it is laborious and takes time to remove by vibration, and improper or inadequate vibration can lead to undetected problems later.Additionally some complex forms cannot easily be vibrated.
Search for self consolidating concrete test set:
Such high-performance concrete had been used mostly in repair applications and for casting concrete in restricted areas.