Banca de DEFESA: PABLO AUGUSTO DOS SANTOS ROCHA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : PABLO AUGUSTO DOS SANTOS ROCHA
DATE: 19/12/2022
TIME: 13:30
LOCAL: https://conferenciaweb.rnp.br/webconf/denise-de-carvalho-urashima
TITLE:

Interface parameters: blocks, geogrid and aggregates in Segmental retaining walls

KEY WORDS:

sustainability; recycled concrete aggregates; geogrid; geosynthetics; segmental blocks

PAGES: 82
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The non-rational consumption of natural resources and the generation of waste are some aspects that compromise the sustainability values of the civil construction industry, which uses a considerable volume of aggregates, such as sand and gravel, in the production of concrete and mortar, as a building material. filling in works of urban and road infrastructure, among others. The generation of civil construction waste (CCW) by the civil construction industry (CCI) has the potential to impact society and the environment. As a way to mitigate possible impacts, the CCI itself seeks ways to insert the CCW, through practices such as recycling or reuse. The use of reinforced soil walls as a solution in urban infrastructure has grown in recent years, as they meet technical, architectural, economic, time and sustainability aspects. For the execution of reinforced soil walls, the following can be used: filling soil, geosynthetics, segmental blocks and natural aggregates (NA). Geosynthetics are products made from polymers, have different functions and are used in different applications. In segmental retaining wall (SRW), geosynthetics, mainly geogrids (GG), are used as reinforcement material. The segmental blocks are made of precast concrete and can be used on the wall facing as anchoring elements for the reinforcements and lateral form of the structure. The NA are used to fill in the segmental blocks, giving the set greater capacity for anchoring the reinforcement next to the face, as well as helping with the drainage of the structure. As an alternative to replacing NA, recycled concrete aggregates (RCA) are used as filler material for segmental blocks in SRW. For the purposes of the research, RCA and AN in the granulometric zone and 9.5/25 mm (coarse aggregates) were submitted to physical characterization tests and connection resistance tests under normal tensions of 40 kN/m², 50 kN/m², 60 kN/m², 80 kN/m² and 100 kN/m², in order to evaluate the performance of the interface elements when subjected to traction. The results of the physical characterization tests showed that the RCA underwent more expressive changes in the values of the properties when submitted to the performance tests. However, the connection resistance values of the tests in which the RCA were used showed more expressive results in relation to the tests using NA, when subjected to normal tensions of 40 kN/m², 50 kN/m², 60 kN/m² and 80 kN/m². The results determined in the connection resistance tests pointed to the potential use of RCA as filling material for segmental blocks for SRW with an elevation equal to or less than 5 meters.

COMMITTEE MEMBERS:
Interno - CONRADO DE SOUZA RODRIGUES
Presidente - DENISE DE CARVALHO URASHIMA
Externo à Instituição - EDUARDO SOUZA CÂNDIDO - UFLA
Externo à Instituição - LUCAS DELEON FERREIRA - UFOP