Modern approach to surface layer modifications of hydrated cement paste for improving permeability estimates of virtual concrete

Permeability estimates obtained by physical experiments and by simulations differ quite significantly. When biases at the experimental side would be eliminated, the expected modest gap could be bridged by surface layer modifications of the hardened cement paste, discussed herein. This involves the formation of a fractal-like nano-particle...

Heron’s fountain 19

Finds and ideas with a surprising element similar to the playful inventions of Heron of Alexandria, after whom this journal is named

A modern approach to porosimetry of virtual cementitious materials

To assess the pore size of virtual cementitious materials, the star volume method (SVM) can be considered an effective tool. Unfortunately, the SVM requires a large number of plane sections in each of the very large number of random points, resulting in a time-consuming and expensive operation. As a more economical alternative, this paper...

200 Years old cauchy concept pointed the route to optimizing concrete porosimetry in Virtual reality: Heron’s fountain 18

The solution of a technical problem is in many cases potentially available however probably somewhat hidden in the literature. At least, research engineers in concrete technology have the tendency not to search for it but to come up with their own ideas. Unfortunately, not always of the same standard as guaranteed by the original source....

Methodolody for porosimetry in virtual cementitious composites to economically and reliably estimate permeability

A novel methodology is described for porosimetry as well as for water transport through the pore system in dynamic DEM-based virtual cementitious materials. The pore network topology, the pore size distribution and the pore connectivity are assessed on the basis of a robotics-inspired pore delineation method and star volume measurements....