Study of aggregate graft recycled of concrete as an internal healing agent

ABSTRACT

The advance in the civil constructions and the increase of the wastes in the works has induced the search for alternatives that substitute the used raw material. Aiming at the preservation of the environment through the reduction of nature extraction, the recycling of materials from losses or demolitions arose in the construction. Among the alternatives is the use of the Recycled Concrete Aggregate (RCA) to replace the natural aggregate. In addition, the pre-saturation of the aggregate in the concrete can act as an internal curing agent. This research seeks to analyze the effect of the use of Recycled Coarse Aggregates Concrete (RCAC) acting as an internal curing agent in concrete. By replacing the natural aggregate (NA) by AGRC defined by means of mass compensation, submitted to two types of curing (air and submerged) and a / agl ratio of 0.42. The results showed that the resistance of the concrete with dry RCA was higher. In internal cure, the use of saturated RCAC did not fulfill the function of internal curing agent.

Keywords
Concrete; Concrete Recycled aggregate; Internal cure