At present, it is well known that concrete is the most used material worldwide for the development of new infrastructures, as well as in our country, the growth of the construction sector is a latent reality; however, the growth shows large rates in the increase of self-construction of an informal nature, where the quality of the process of preparing and curing the concrete is questioned, it is common to see that the proper design is not respected according to the use of the structure , there is an erroneous tendency to apply more water to make the mixture more workable, in addition to not providing curing after the structures are poured. In the present investigation, the water/cement ratio and the type of curing were evaluated on compressive strength (NTP 339.034), density (ASTM C 642) and resistance to attack by chlorides (NT BUILD 492) and sulfates (E0. 60) in a conventional concrete ...