In the present investigation, the influence of nanosilica addition on concrete permeability was analyzed in order to demonstrate that its use is convenient considering the present conditions in the city of Arequipa. Cylindrical concrete specimens of 15x30 cm were prepared, considering water/cement ratios of 0.60, 0.55 y 0.50, and nanosilica doses of 0.5% and 0.7%, in which the permeability coefficient (at 28 days of preparation) and the axial compressive strength (at 3, 7 and 28 days of preparation) were analyzed. The results evidence that, for a dosage of 0.5% additive, a reduction in the permeability of the concrete will be generated as the water/cement ratio decreases, while for a dosage of 0.7%, the permeability will be reduced up to a certain point and then increase. For both cases it is concluded that the more cement in the mix, the lesser the effect of the additive. The concrete m...

In the present investigation, a comparison was made between the Peruvian, Argentine, Bolivian and Brazilian standards of structural concrete, in order to analyze its content regarding the durability of the concrete and find possible shortcomings of the current Peruvian legislation. The durability of concrete is the ability of this material to withstand the action of various agents that modify its properties. This aspect has become important in recent years because its consideration in the design of structures could prevent problems such as cracking, corrosion, carbonation and others, which could put at risk the functionality of vital constructions in society, besides causing costs for repair and in the worst cases, reconstruction. To make a durable concrete, an analysis of the type of exposure in which the projected structure will be found is made, so that measures can be taken to mitiga...