Properties of self consolidating concrete for prestressed members

21 Jan

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.This leads to a reduction in the need for skilled labor and construction costs in general.Since SCC mix designs either contain different proportions of aggregate from conventional concrete or large amounts of chemical admixtures, members constructed using SCC may perform differently than those cast with conventional concrete.The moduli of elasticity of the SCC mixtures were in reasonable agreement with the elastic stiffness assumed during the design of conventional slump concrete structures.The long-term drying shrinkage strain for all the SCC mixtures were approximately the same or less than those measured for the control mixtures.

The different properties of SCC may cause increased transfer and development lengths from those calculated by these equations.

Concrete technology is in a constant evolution, increasingly generating new and better solutions to the challenges of engineering and architecture.

One of the materials that has grown in use is self-consolidating concrete (SCC).

Forty-one concrete mixtures were used to examine the effects of cementitious material and aggregate type and content on flow and compressive strength of expanded clay and shale lightweight self-consolidating concrete.

Type III cement was required to produce compressive strengths in excess of 28 MPa at one day, and high cementitious materials contents were required for adequate fresh and hardened properties.