Concrete consolidating self

30-May-2017 04:37

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While SCC mixtures have been successfully produced with 1 ½ inch (38 mm) aggregate, it is easier to design and control with smaller-sized aggregate.Control of aggregate moisture content is also critical to producing a good mixture.Self-compacting concrete has been used in bridges and even on pre-cast sections.One of the most remarkable projects built using self-compacting concrete is the Akashi-Kaikyo Suspension Bridge.SCC looks very different from conventional concrete while mixing.Concrete producers must “retrain their eyes” for this very fluid mixture as it turns corners and fills forms.The stability or resistance to segregation of the plastic concrete mixture is attained by increasing the total quantity of fines in the concrete and/or by using admixtures that modify the viscosity of the mixture.Increased fines contents can be achieved by increasing the content of cementititious materials or by incorporating mineral fines.

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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.

Self-consolidating concrete is highly flowable, non-segregating concrete with a slump flow of 20 to 30 inches that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation.