Estudo da influência dos polímeros no tempo de pega de pastas de cimento

Abstract

Civil construction, due to the variety of possibilities and special needs for each construction, always seeks innovations and materials and construction methods in orden to increase pofitability, optimize execution time and for specific Jobs. Among these innovations, polymers stand out, which are large networks formed by a large number of small molecules, called monomers, which, when combined through polymerization, have great tensile strenght (mainly due to the C-C covalente bonds) and great ductility due to the fact that the bond between the carbon networks is of the second order, that is, van der Walls. The technological development of polymers made possible the production of hundreds of diferente tymes of polymers without any equivalence in the natural world and, in this way, it became the first synthetic material used in engineering such as adhesive mortars, mortars for waterproofing and, thus, by apperance of new polymers, it is necessary to further study their influence on mortars, whether in workability, resistance to flexion and traction, setting time, among others. The proposed work aims to study the influence on the setting time of Portland cement pastes, when adding emulsifiable powdered polymers.