Estudo laboratorial de bases granulares recicladas in situ
Nenhuma Miniatura disponível
Data
2015-03-24
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The full depth reclamation technique of pavements consists in the reuse of granular materials
of existing layers as well as the granular and bituminous materials that compose the
deteriorated asphalt layer may also add aggregates or chemical stabilizers, giving rise to a new
base that will receive a new asphalt layer. Besides eliminating the need of spoil area of
material from asphalt layer deteriorated, this technique gives greater agility to the site and a
reduction in costs. This research was motivated by the agreement between the university
(Universidade Federal de Goiás) and the government inspection agency (Controladoria Geral
do Estado de Goiás – CGE-GO) and its main objective to evaluate laboratory if the solutions
specified in the project are technically suitable for the pavements offer a satisfactory
performance. The research has the specific objectives: to determine if the amount of gravel
added to recycling is the amount specified in the project and, if indeed, this percentage is the
one submitting the best mechanical results and check whether there was or not the breaking of
aggregates during the compaction. Initially, a deformed sample of recycling material of four
roads were collected in the field and from the accomplishment of conventional laboratory
tests (characterization, compaction, expansion and California Bearing Ratio) and dynamic
triaxial tests their characteristics and properties were determined and analyzed. Furthermore, a
dosage study related to the amount of gravel added to the mixture was also carried out to
check which content would provide a better performance to the pavement. The stress analysis
was performed using the computer program Sigma / W and from the stresses acting in the
bases of the roads was obtained the resilient modulus values of each base material used in the
reconstructions and the results were compared with values obtained in existing similar studies.
Among the base materials used in the reconstructions of the four roads studied, three showed
resilient modulus in the laboratory higher to 400 MPa. From the analysis of the results, it
appears that the recycled base with the addition of gravel has potential of application in the
region of study. However, to be successful in the practice and the best relation for money, it is
important to make a preliminary study of dosage, set the adequate compaction power, perform
executive control on the site and evaluate the technical basis of specifications which they
consider mechanistic parameters, still little existing in Brazil.
Descrição
Citação
SILVA JUNIOR, V. M. Estudo laboratorial de bases granulares recicladas in situ. 2015. 139 f. Dissertação ( Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2015.