Banca de DEFESA: Luis Angel Moreno Anselmi

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Luis Angel Moreno Anselmi
DATE: 24/06/2024
TIME: 16:00
LOCAL: Sala Teams (On-line)
TITLE:

Behavior of Asphalt Mixtures Made with Aggregates from Construction and Demolition Waste (CDW) Improved with a Polymeric Additive

KEY WORDS:

Construction and Demolition Waste, Morphological Characterization, TERRAFIX Polymer, Asphalt Mixtures, Reuse and Recycling

PAGES: 256
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SPECIALTY: Pavimentos
SUMMARY:

In response to the challenges presented by the continuous increase in Construction and Demolition Waste (CDW) generation in expanding urban contexts, this study proposes an innovative technical approach for the reuse of these materials. The objective is to explore the potential of CDW as alternative aggregates in asphalt mixtures, an area that has been gaining increasing attention in the field of civil engineering.
The research focuses on two specific granulometries of CDW. This choice allowed for a detailed comparative analysis of how different aggregate sizes can influence the behavior and properties of asphalt mixtures. The morphological characterization of CDW, performed using 3D scanning technology and Scanning Electron Microscopy (SEM), was a key aspect of the study, providing valuable insights into the texture and shape of the waste. The SEM analysis, complemented by Energy Dispersive Spectroscopy (EDS), enabled a detailed observation of the CDW surfaces with and without the additive, revealing the presence of adhered materials such as clays, fissures caused by adhered mortar, and fractures of the material during crushing. Additionally, X-Ray Diffraction (XRD) tests were conducted to determine the mineralogical composition of the CDW.
An innovative aspect of the research was the application of the TERRAFIX additive to the CDW through an absorption process. This technique aimed to improve crucial characteristics of the CDW, such as waterproofing and adhesion, making them more compatible for use in asphalt mixtures. The treatment with TERRAFIX represents an important step in the preparation of CDW, as it modifies their surface properties and can enhance interaction with the asphalt binder.
The laboratory tests focused on evaluating the mechanical performance of asphalt mixtures incorporating the treated CDW. Various tests were conducted to determine parameters such as stability, wear resistance, moisture damage, fatigue, resilient modulus, and tensile strength of the mixtures, among others. The results indicated that asphalt mixtures with treated CDW showed promising performance, suggesting that this approach can offer a viable alternative to conventional aggregates, both technically and economically.
This study can significantly contribute to the field of civil engineering, providing a solid foundation for future research and practical applications. The reuse of CDW in asphalt mixtures not only presents a technical solution for managing this waste but can also lead to significant advances in terms of resource efficiency and innovation in construction materials.

COMMITTEE MEMBERS:
Externo à Instituição - JOH. KENNEDY GUEDES RODRIGUES - UFCG
Presidente - 404227 - MARCIO MUNIZ DE FARIAS
Interna - 1519113 - MICHELE DAL TOE CASAGRANDE
Interno - 3132829 - RAFAEL CERQUEIRA SILVA
Externo à Instituição - WASHINGTON PERES NUNEZ - UFRGS