Fundamental properties of rubber modified self-compacting concrete (RMSCC)

A series of laboratory investigations were undertaken on rubber modified self-compacting concrete (RMSCC) to study the workability of the mixture during its production and the fundamental mechanical and dynamic properties of cured specimens. The results showed that, compared to the self-compacting concrete (SCC), the slump together with passing and filling ability of RMSCC mixtures are lower despite a higher dosage of super plasticiser in the fresh mixtures. In addition, as expected, the strength of the RMSCC was lower, although improved dynamic properties such as lower natural frequencies, marginally lower dynamic modulus of elasticity, and higher dampening were observed. The results indicated that if the durability issues are tackled properly, RMSCC has the potential to be used as a vibration attenuation material.

► No noticeable improvement of flow rate in RMSCC despite high dosage of super plasticiser.
► RMSCC exhibits high viscosity and low filling ability because of low density rubber particles.
► RMSCC exhibits lower strength but has better dynamic properties and flexibility.
► The increased dosages of super plasticiser had little impact on dynamic properties of RMSCC.
► Significant potential for RMSCC where better dynamic properties are desirable.