Utilização do pó de granito como substituição parcial do agregado miúdo, na fabricação de argamassas

Abstract

With the growth of the civil construction market, the great need to use natural resources ends up modifying the environment, also contributing to the increase in waste generation. As an example, we can mention the ornamental stone processing industry, a market that generates tons of solid waste because they no longer have use and do not have a disposal site, these are deposited in nature, causing an increase in various environmental impacts. Given the above, this work aimed to analyze the replacement of natural sand by granite powder at levels of 50% and 100%, in the manufacture of mortar. For this, the mix of 1:3 in mass (portland cement: fine aggregate) was adopted, using portland cement CP IV-RS 32, with a water/cement factor between (0.545 and 1.025). For the analysis, compression and pozzolanic activity tests were performed. Its particle size showed that it has a large amount of fines, which resulted in a decrease in resistance and an increase in water absorption, a factor that did not harm the manufactured mortar, positively resulting in its possible use in the civil construction market. The pozzolanic activity test obtained positive results, because the ornamental rock residues presented the minimum values required.