Estudo das concreções lateríticas de Tocantins como agregado graúdo na fabricação de concreto de cimento portland destinado a pavimentação rodoviária.

Abstract

It is easily observed that major number of highways in Brazil have been made in CBUQ, that is, flexible pavement, instead of CCP, better known as rigid pavement, although professionals of this area know the advantages of this kind of pavement, such as durability and easy manutention. Among the major reasons flexible pavement is preferred than rigid pavement it is the cost in working with rigid pavement, that becomes higher by granite brite cost, used as coarse aggregate, when applied in places where there is a lack of jazides of that material. For those places, the final cost of granite brite cubic meter can increase over 48 p.c., if the same is compared to places where this is easily found. Because of the high costs for the execution of pavement in CCP, and knowing that 40 p.c. of emerse lands of the Earth, between tropics of Cancer and Capricorn, are cover by laterites and that, in Brazil, that percentage comes close to 60 p.c. of the total area of the country, that there has been seeing the need of analyzing lateritic as coarse aggregate due to rigid pavement. In order to do that, physic experiments were done to concretions and mechanic ones to lateritic concrete, verifying the viability on usage that kind of aggregate in concrete due to highway pavement, showing that kind of material an alternative to places where granitic brites are low, as like North of Brazil and others places on Earth.