The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with different values of yield stress and plastic viscosity were tested in a concrete truck. The measurements made with the truck were based on the ty...

In the present study, the mechanical properties of self-compacting concrete were investigated after the addition of different amounts of ZnO nanoparticles. The zinc oxide nanoparticles, with an average particle size of about 30 nm, were synthesized and their properties studied with the help of a scanning electron microscope (SEM) and X-ray diffraction. The prepared nanoparticles were partially ...

The average in-situ strength of a member, expressed as the strength of an equivalent compression test result, will be lass than of a standard cast specimen of the same concrete, which has been properly compacted and moist-cured for 28 days. The extend of the difference will depend on construction techniques, but general patterns can be defined according to member type. Variations in concrete su...