SILVA, V. C.; http://lattes.cnpq.br/9833841479266435; SILVA, Valkiria Calheiros da.
Résumé:
One of the effects of urban expansion is the production of construction and
demolition waste (CDW). The way these wastes have been discarded has caused
great concern because of the negative impacts to the environment and, directly or
indirectly, to the society. In order to reduce these impacts, we believe that the use of
this material as aggregate in paving is a viable alternative. In this context, this study
aims at analyzing the mechanical behavior of recycled aggregate from the
Universidade Federal de Campina Grande - UFCG - in order to use it in base layers
and sub-base and asphalt mixtures. The research consists of laboratory tests to
analyze their physical and mechanical behavior. Thus, the physical and mechanical
properties of the recycled aggregate for use in sub-base and base surface were
determined by the following tests: composition, the percentage of detrimental
materials, density, shape of the grains and compaction influence of compression, the
California Bearing Ratio. The tests of asphalt mixtures included: fundamental tests of
the binders (Brookfields Viscosity, Softening Point and Penetration). The mixtures
were analyzed by means of mechanical tests such as Tensile Strength by Diametral
Compression Module, Resilience and Testing for Moisture Induced Damage, and all
samples submitted to the Marshall compaction process. The results showed us that,
when compacted in the intermediate energy the residue can be used as sub-base
and when compacted in the modified energy it can be used in as base. As aggregate
in asphalt mixtures, the mixture with 3,9% of showed satisfactory results. Thus, we
concluded it is possible to build pavement using throughout its structure recycled
aggregate thus contributing to sustainable development.
