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http://hdl.handle.net/11422/10166| Type: | Tese |
| Title: | Design and characterization of strain hardening curauá fiber cement-based composites |
| Author(s)/Inventor(s): | Żukowski, Bartosz |
| Advisor: | Toledo Filho, Romildo Dias |
| Co-advisor: | Silva, Flávio de Andrade |
| Abstract: | Este trabalho apresenta a aplicação do modelo teórico para desenvolver os compósitos cimentícios reforçados com fibra natural de curauá com endurecimento na deformação. O trabalho investiga as propriedades das fibras curauá e a influência dos ciclos de lavagem e secagem e do tratamento alcalino na resistência da fibra. A aderência entre fibra e matriz foi verificado pelos ensaios de arrancamento. Os dados dos ensaios foram implementados no modelo teórico para verificar o mínimo teor da fibra necessário para endurecimento do compósito acontecer. A influência do cumprimento da fibra no comportamento mecânico do compósito foi verificada. No final, os compósitos foram expostos ao envelhecimento natural, ciclos de lavagem e secagem, e ciclos de congelamento e descongelamento para verificar a durabilidade de endurecimento e a fibra natural dentro da matriz cimentícia. |
| Abstract: | This work presents the application of the theoretical model to design the strain hardening cement-based composite reinforcement with natural curauá fiber. The work investigates the properties of curauá fiber and the influence of hot water washing cycles and alkaline treatments on fiber strength. The fiber-matrix bond is investigated by pullout tests. The collected data is implemented into the theoretical model for minimum fiber volume needed to achieve strain hardening behavior. The influence of fiber length on mechanical performance of the composite is investigated. In the final stage, the composites were exposed to natural weathering, wetting and drying cycles, and freeze and thaw cycles to verify the durability of the strain hardening behavior as well as the curauá fiber in the cement-based matrix. |
| Keywords: | Engenharia civil Compósitos cimentícios Fibra curauá Durabilidade |
| Subject CNPq: | CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
| Program: | Programa de Pós-Graduação em Engenharia Civil |
| Production unit: | Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia |
| Publisher: | Universidade Federal do Rio de Janeiro |
| Issue Date: | Dec-2017 |
| Publisher country: | Brasil |
| Language: | por |
| Right access: | Acesso Aberto |
| Appears in Collections: | Engenharia Civil |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 883068.pdf | 3.4 MB | Adobe PDF | View/Open |
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