Estudo do comportamento de argamassas modificadas com adição de nanotubos de carbono

Abstract

The nanotecnologia is considered at present as one of the most promising branches in the scientific field. Because of presenting great resistance capacity to the traction, an important component one can make the nanotubos of carbon (NTCs) into the manufacture of concrete ones and mortars that apply for good performance in the above-mentioned property. The application of this material in the industry of the civil construction is promising and she presents great growth perspectives due to the benefits that this material can provide in wombs cimentícias. So, this study has as objective values the effects of the incorporation of NTCs at the physical and mechanical properties of wombs from cement Portland. The NTCs were added to the mortars in the form of dispersal, in the tenors of 0,20 %, 0,30 % and 0,40 %, regarding the cement mass. For the mortars in the fresh state, there were determined the rate of consistency, density of mass, tenor of incorporated air and water retention. The evaluation of the properties in the hardened state there were they all rehearsed under the mortar devoted to a substrate a standard, the fulfilled tests were: absorption for the method of the pipe and potential resistance to the traction. The mortars with 0,20 % and 0,30 % of NTCs, when compared with the reference mortar, they presented improvements in all the properties analysed in the present study. With the noted improvements, some challenges are even being faced for the use of the NTCs in wide scale in the wombs cimentícias, such as highly costs of the material and the difficulty in an efficient dispersal is guaranteed in the mixture.