Transport properties of high volume fly ash roller compacted concrete

This paper describes research on the transport properties of high-volume fly ash roller compacted concrete (RCC). The mixes were developed through incorporating 50–260 kg/m3 cement and high volumes of fly ash ranging from 40% to 85% by mass of the total cementitious material. The concretes were investigated for permeability, absorption, sorption and chloride diffusion. The study showed that RCCs of moderate cement and moderate fly ash contents had lower values of permeability, absorption, sorption and chloride diffusivity.

► Roller compacted concrete with high volumes of fly ash was developed.
► Vebe time of the concretes was between 15 and 20 s. There was sufficient paste.
► High (c + f) content is beneficial to decrease w/(c + f) ratio.
► Lower permeable RCC can be produced with cement ranging from 150 to 190 kg/m3.
► Absorption was lower than limits associated with good quality concrete by CEB (1989).