Banca de DEFESA: RENATA BORGES JACOE

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RENATA BORGES JACOE
DATE: 10/08/2023
TIME: 09:00
LOCAL: https://conferenciaweb.rnp.br/webconf/conrado-de-souza-rodrigues
TITLE:
KEY WORDS:

ram extrusion, pozzolan, fiber cement, rheology.

PAGES: 90
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The most common industrial production of fiber cement is carried out by the Hatschek method, an alternative method for the production of fiber cement is extrusion, which has a lower implantation cost, similar physical-mechanical properties, oriented fibers, products of various shapes and sizes, and potential use of waste. This work evaluated the production of fiber cement by the extrusion method with the incorporation of rice husk ash in its matrix. The study of the modification of the cementitious matrix in extruded composites is rarely found in scientific articles, being a new subject to be addressed, already being extensively studied in fiber cements produced by the Hatschek method and obtaining good mechanical results in comparison with cementitious matrices without additions. The use of these mineral additions (such as ash), mainly obtained from waste, is a great environmental advantage for this method. The work evaluated five types of traces, with two different cement matrixes, with 50% cement and 50% filler and another with 70% cement and 30% filler, in these matrices rice husk ash was incorporated in different proportions (10, 15, 20 and 30%). Three steps were performed, initially evaluating the water/cement ratio and the suggested traits; in a second stage, the rheological behavior of the matrix was evaluated; in the last stage, in addition to the rheological behavior of the fiber cement, physical and mechanical characterization tests were also carried out. The results demonstrated that the addition of ash to fiber cement is feasible for the ram extrusion method, however percentages above 15% do not lead to significant changes in the mechanical characterization results. A similarity was also observed in results where there is addition of 10% rice husk ash in a 70/30 matrix (cement/filler) and the 50/50 matrix (cement/filler), which should be better evaluated in new tests .

COMMITTEE MEMBERS:
Presidente - CONRADO DE SOUZA RODRIGUES
Interno - PETER LUDVIG
Externo à Instituição - MARCOS ALYSSANDO SOARES DOS ANJOS - IFPB
Externo à Instituição - NORMANDO PERAZZO BARBOSA - UFPB