Influence of powder and paste on flow properties of SCC

RETRACTED: Comparative study on effects of Class F fly ash, nano silica and silica fume on properties of high performance self compacting concrete

“…Since the SP plays a very important role in the flowability of SCC mixes [31], a modified mixing procedure was adopted to take the benefit of action of adsorption of molecules of poly-carboxylic ether based SP on the cement particles for all the mixes. HPSCC mixtures were prepared by mixing the coarse aggregates, fine aggregates and powder materials (cement, nano silica, silica fume and fly ash) in a laboratory drum mixer.…”

Utilization of coal- and biomass-fired ash in the production of self-consolidating concrete: a literature review

“…In conclusion, as the number of particles crossing the obstacles, their volume fraction, and the ratio between the diameter of the particles and the contraction gap increase, the probability of granular blocking with a suspension crossing a flow contraction increases likewise (Roussel et al, 2009). Therefore, increasing the volume of the paste for a given aggregate increases passing ability by both reducing the volume of the aggregate that must pass through the confined spaces and reducing inter-particle friction between the aggregate materials (Girish et al, 2010). Further, the extent to which plastic viscosity increases also depends on the size of the coarse aggregates (Zerbino et al, 2009).…”

Long term mechanical properties of self-compacting concrete made with slag cement and supplementary cementitious materials

“…This value decreases with the decrease of total powder content reaching 2.90 and 2.20 kg/m 3 in case of 580 and 520 kg/m 3 respectively. This behavior could be explained by the effect of powder on enhancing the plastic viscosity of the mixture, thus, requiring additional HRWRA to obtained the desired workability [28].…”