The present research was conducted using aggregates Next quarries: RIO Cumbaza 150 m. Upstream of the bridge on the Marginal highway. Huallaga River: In the District of Shapaja, distant approximately 23 km. of the city ​​of Tarapoto. In the quarry of the river Cumbaza took samples were mixed of both thin thickness of Como in Concrete form, in an amount of 2,500 kg. and laboratory separated By sieving. In the quarry of the Huallaga river Samples were taken separately because that just So they do find in the riverbed in the following: Quantities 100 kg fine aggregate. " 1,200 kg coarse aggregate. These samples Were taken to the Laboratory of Soil Mechanics, Concrete and Asphalt Department of Civil Construction I.S.T. "Nor Oriental Jungle" bring paragraph Just I Work, with the advice of the Technical Civil Construction Velarde Pezo Perea (Professor and Head of Laboratory). One part of p...