SANTOS, T. Y. C.; http://lattes.cnpq.br/4479613776063632; SANTOS, Tálison Yure da Costa.
Resumo:
Civil construction has a high consumption of materials, making it a major generator of
environmental impacts. Therefore, it has hit the environment hard, whether through
mining to manufacture these materials, or through incorrect disposal of the waste
generated. Given this situation, the search for alternative materials for its composition
has become increasingly interesting. Therefore, this work aims to study the partial
replacement of coarse aggregate with construction and demolition waste (CDW) in
concrete production. Initially, the physical characterization of the materials was carried
out, and then specimens were molded with replacement by CDW with percentages of
15 %, 30 % and 50 %, and the slump test conditions were investigated, to be ruptured
after 7 days, 14 days and 28 days to check the resistance to simple compression.
Concrete with 15 % CDW had a slump test slump of 80 mm, that with 30 % had a
slump of 80 mm, and that with 50 % had 100 mm, they presented an average
compressive strength of 16.54 MPa, 15.07 MPa, and 13.24 MPa, respectively.
Therefore, it was inferred that due to the porosity of the CDW aggregates, a drop in
resistance to simple compression was obtained when compared to the specimen with
natural aggregate. However, the altered concrete presented environmental viability
and could be used in construction processes without structural purposes, such as
sidewalks, pedestrian plazas, curbs, drainage elements, fence blocks, among others,
thus reducing the environmental impacts caused by mining. of this raw material, and
due to inadequate disposal.
