Study of kinetic, structure and properties evaluation of organically modified montmorillonites and micro nanocellulose added to cement paste

ANALÍA VÁZQUEZ; TERESA MARÍA PIQUÉ; CATALINA GOMEZ HOYOS; MARIANO MARTIN ESCOBAR

Rio de Janeiro

Conferencia; ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineerin; 2012

The American Society os Mechanical Engineers

The effect of the addition of cellulose microfibrils, water soluble polymer, nanoclays and carbon nanotubes to the cement paste was studied. The hydration kinetic was determined by means of an adiabatic rise temperature method. The addition of polymer to the cement paste produced the highest delay in the hydration kinetic followed by the addition of organically modified montmorillonites in a polymer solution. Flexion and compression strength were determined. Some admixtures produced an increase of the cement paste?s void content. Cellulose produced a change in the rheology and a delay in the hydration kinetic of the cement paste. The use of heat for curing increased the mortar?s mechanical properties. Carbon nanotubes also were added to the cement paste in order to study the effect on electric conductivity and hydration kinetic.