Browsing by Author "Bravo, Miguel"
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- Produção e caracterização de argamassas com RCD reforçadas com fibra de sisalPublication . Soares, Edilson; Bravo, Miguel; Gonilho Pereira, Cristiana; Jasper, Catarina MarchiSustainable development is a crucial political and social project for humanity, encouraging the search for sustainable solutions. In materials engineering, the use of low-cost and low-energy materials is essential. This research addresses environmental and sustainable development issues, focusing on the use of Construction and Demolition Waste (CDW). The use of CDW prevents its irregular disposal in landfills, increasing recycling in Portugal. In addition, the Agave Sisalana plant, abundant in Brazil, especially in Bahia, offers usable fibers and pulp. Mortar with CDW and sisal fibers is sustainable, composed of recycled and abundant materials. Nine types of mortars were produced: cement with fine natural aggregate (reference), replacing 50% and 100% of the fine natural aggregate with fine recycled aggregate, with the addition of 1% and 2% of 30 mm sisal fiber. Tests were performed on spreading, density, air content, mechanical strength, thermal conductivity, brick pullout, open porosity and capillary water absorption. The results showed that the recycled aggregate increased compressive strength, capillarity and porosity. The presence of fibers allowed large deformations before rupture, significantly improving mechanical strength and thermal conductivity.