Two years ago, Resolution 472 of February 28, 2017 urging the use of recycled materials in civil works and concrete structures in all over the city of Bogotá, to counteract the use of aggregates from natural sources and encourage practices that promote the environment conservation. The main goal of this study is to encourage the use of explosives in demolitions by studying the granulometries through the optimization of explosive load factor to be competitive in the cost structure of the crushing of concrete and demolition waste (CDW). Starts with a little research of the market structure of natural sources aggregates in the city and its comparison with the use of is currently considered. Then, by means of 2 types of concrete samples of 4000 psi of resistance that simulate beam and column structures respectively, are detonated with 4 different doses of indugel. The mechanism to predict the theoretical granulometry, the type of explosive and the dosage of each of the samples is done through the Kuz-Ram fragmentation model, which is compared with the granulometries obtained from 8 detonations in total. Finally, by conservative decisions with peak particle velocity, technically efficient with the use of indugel and consistent with the desired size for the economic efficiency crushing required, a load factor of 1kg / m3 is obtained for beams and 1.2 kg / m3 for columns.