Structural evolution of cement paste with nano-Fe3O4 under magnetic field - Effect of concentration and particle size of nano-Fe3O4

The effects of concentration and particle size nano-Fe3O4 particles on the evolution structural build-up cementitious paste under magnetic field are experimentally investigated then verified by theoretical calculations. Three types with various sizes exploited. results show that liquid-like properties incorporated pastes increase immediately after initiation an external extent this increment increases content. magneto-rheological effect, quantified difference storage modulus at 300 s between 0 T 0.5 T, increasing nanoparticles. plays a dominant role in viscoelastic without field, whereas rheological response to is mainly determined crystalline structures particles. yield parameter useful indicator describe intensity response, rate loss early age proportional movement velocity