The idea of ​​developing this thesis comes from my concern to see that in the city of Tarapoto continues indiscriminately using concrete quarry Cumbaza River, knowing that the coarse aggregate does not meet the minimum mechanical strength requirements for its use specifically stipulated by NTP 400,037. Given this reality and having reference to previous studies on this quarry, this work It aims to present a design alternative mixtures based on the combination of aggregates quarries Cumbaza River and Rio Huallaga, so that we can replace the poor quality stone by stone River Cumbaza good quality River Huallaga, and more satisfactory results obeying the limitations ele NTP. for aggregates The level chosen for the development ele this thesis is the "Method Added Global and Module Fineness "which is based on an experimental procedure, and impinges more optimization global aggregate grain ...