Study of structural strength into mortars of portland cement by controlled adding of indole nanostructures

Abstract

"A bicyclical biopolymer compound was added to cementitious materials in order to evaluate the strength be- havior as an important characteristic in the construction of buildings in seismic areas. Mortar specimens were prepared Portland cement with different percentages of indole, replacing the water content partial and com- pletely of a solution containing the biopolymer to constant concentration. Morphological changes brought about by hydration processes were monitored for 7, 14, 28 and 90 days using scanning electron microscopy and X-ray diffraction. It was observed, that the samples with combinations water/Biopolymer (W, Q) (0 12) and (3, 9) reached the highest strength values for water/cement ratio (A / C) of 0.8, showing an increase up to 18% over the reference nominal value. The behaviors of strength values have been associated with the uniform development of Tobermorite and inhibition of the formation of secondary Ettringite as a function of content and dispersion of the Biopolymer."