Prediction of extrusion load and liquid phase filtration during ram extrusion of high solid volume fraction pastes

A novel pull-out device used to study the influence of pressure during processing of cement-based material reinforced with coir

“…In the work by Khelifi et al [56], consolidation has a significant effect only for a loading time in the order of several minutes. What is more, no filtrated liquid flowed outside the sample as observed during the extrusion of cement-based materials [56,57]. Therefore, the matrix remains homogeneous during the process and is not considered to be responsible for the bonding stress increase.…”

“…liquid and void filtration) due to the load applied during casting is the origin of the increase in the bond strength. However, it has been shown that kaolin/cement pastes are not likely to undergo liquid filtration during short loading as the one performed during samples casting [56]. In the work by Khelifi et al [56], consolidation has a significant effect only for a loading time in the order of several minutes.…”

“…However, it has been shown that kaolin/cement pastes are not likely to undergo liquid filtration during short loading as the one performed during samples casting [56]. In the work by Khelifi et al [56], consolidation has a significant effect only for a loading time in the order of several minutes. What is more, no filtrated liquid flowed outside the sample as observed during the extrusion of cement-based materials [56,57].…”

“…Powder and soil mechanics often use a proportionality law between axial stress and radial stress in compression die [56,58,59]. According to Jacky [59], the radial stress applied on the fibre wall during the loading phase r r,load can be expressed as follows:…”

Influence of Portland cement and ground-granulated blast-furnace slag on bleeding of fresh mix

“…Bleeding properties are also affected by the pressure generated on the mixture, and an experimental simulation was recently performed to investigate the bleeding phenomenon under high pressure [20]. Such high pressures typically occur in the case of pumping processes, high column construction, and precasting process, such as extrusion flow of paste [27].…”