Self consolidating concrete strength

02-Jun-2020 00:06

Concrete that segregates loses strength and results in honeycombed areas next to the formwork.

A well designed SCC mix does not segregate, has high deformability and excellent stability characteristics Self-compacting concrete produces resistance to segregation by using mineral fillers or fines, and using special admixtures.

Four mixes incorporating cement kiln dust with partial cement replacement of 10%, 20%, 30%, and 40% were produced and compared with a control mix of Normally Vibrated Concrete (NVC).

Superplasticizer was used to increase the flow-ability of SCC mixes.

The shrinkage strain was measured for all specimens for a period of 120 days.

Based on the experimental results, it was found that SCC mixture containing 20% cement replacement of CKD exhibited the highest mechanical strength compared to other SCC mixes and NVC mix as well.

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Another advantage of SCC is that the time required to place large sections is considerably reduced.

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).