Banca de QUALIFICAÇÃO: PRISCILA DE SOUZA MACIEL

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : PRISCILA DE SOUZA MACIEL
DATE: 24/08/2023
TIME: 14:00
LOCAL: Videoconferência
TITLE:

Study of the synergistic effect of the addition of high modulus fibers and superabsorbent polymer in ultra high performance concrete for rigid pavement reinforcement

KEY WORDS:

Ultra high performance concrete, superabsorbent polymer, high modulus polyethylene, rigid pavement, deck reinforcement.

PAGES: 120
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

Orthotropic bridge decks are known for their exceptional performance in structures with heavy traffic. To address the challenges of worn-out pavements in such areas, the application of ultra-high-performance concrete (UHPC) reinforcements has emerged as a promising solution. Researchers have been investigating the combined use of UHPC and superabsorbent polymers (SAP) to facilitate internal curing and mitigate shrinkage. Furthermore, incorporating high modulus polyethylene (HMPE) fibers in UHPC has been shown to enhance its properties, particularly in areas prone to porosity after the initial water absorption by SAP. Therefore, this research aims at obtaining UHPC with HMPE and SAP, analyzing the synergistic effect between them to meet the properties that ensure its application in rigid pavement reinforcement for bridges. The methodology will commence with the selection of suitable materials and the determination of a basic UHPC composition that satisfies the minimum regulatory criteria for flexural strength and compressive strength. Subsequently, moldings will be created, incorporating various combinations of HMPE and SAP to achieve the desired properties. Fresh-state tests will assess consistency, while hardened-state tests will evaluate mechanical strength, toughness, shrinkage, self-sealing capacity, permeability, and microstructure characterization. Once the desired UHPC formulation with SAP and HMPE is achieved, the acquired knowledge regarding the scientific behavior of these innovative materials will prove invaluable for engineering applications. The primary objective of this research is to develop a UHPC composition specifically tailored for reinforcing bridge deck pavements. By harnessing the synergistic potential of the proposed SAP and HMPE additions, this work aims to contribute to the advancement of new materials, enhance pavement quality, and reduce the need for road maintenance.

BANKING MEMBERS:
Presidente - 2120767 - PAULO CESAR CORREIA GOMES
Interno(a) - 1120064 - SEVERINO PEREIRA CAVALCANTI MARQUES
Externo(a) ao Programa - 1582140 - KAROLINE ALVES DE MELO MORAES
Externo(a) à Instituição - AUGUSTO CESAR DA SILVA BEZERRA - CEFET-MG
Externo(a) à Instituição - JOSÉ ROBERTO TENÓRIO FILHO