As the RA content increase in the mix, the workability reduces especially at lower w/c ratio in their study found that the entrapped air content was similar when compared to normal concrete mix having a range of 2.4 ± 0.2 %.
Partial (50%) replacement of carbon fiber by carbon black lowers the cost, in addition to increasing the workability, while the electrical conductivity and the electromagnetic interference shielding effectiveness are maintained.
Their addition results in significant increase of the workability of the mixture, in reduction of water/cement ratio or even of cement quantity.
The results also showed that the compression, the flexure and the shear toughness all increased with an increase in the fiber content, while the workability decreased with an increase in fiber content.
When the expansive admixture was used, a decrease in air content and a slight increase in the slump were shown, and the workability of concrete decreased when it was mixed with fiber, leading to a lower slump compared to other mixes.
The results obtained for concrete indicated that there is a slight increase in density of nearly 5% as copper slag content increases, whereas the workability increased significantly as copper slag percentage increased compared with the control mixture.
For fresh concrete, the inclusion of the ultrafine POFA tends to increase the workability of the HSGCs, and retards the setting times in particular at higher POFA contents.
Waste glass can increase the workability and reduce the density of steel slag concrete.
Super plasticizer (Gelenium) was used to increase the workability of freshly prepared fiber reinforced concrete.
Because of its spherical shape, fly ash can increase the workability of cement, according to the U.S. Army Corps of Engineers, Memphis District.
