Banca de DEFESA: ANA LÍGIA PESSOA SAMPAIO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA LÍGIA PESSOA SAMPAIO
DATE: 27/03/2020
TIME: 09:00
LOCAL: Por prevenção à COVID-19, os envolvidos participarão por videoconferência de suas residências.
TITLE:

PROPOSAL OF AN EARTHBAG CONSTRUCTION SYSTEM WITH INCORPORATION OF CASSAVA WASTE WATER.


KEY WORDS:

Earthbag Construction. Superadobe. Brickeradobe. Cassava. Simulation.


PAGES: 150
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The Brazilian territory is not uniform and has specific bioclimatic contexts for each region, categorized into eight bioclimatic zones with different parameters and conditions to achieve comfort, however they are not taken in account when thinking about new materials and construction techniques in the country. The Bioclimatic Zone 07, which cover part of the Brazilian savanna and savannah in which walls with high thermal mass are recommended, and 08, which comprises a good part of the North of Brazil and the coast of the Northeast, with the suggestions of
light constructions, cross the state of Rio Grande do Norte, but there are no options for building systems that meet the recommendations of Zone 07 in the civil engineering segment. Thinking about it, techniques that allow the use of soil for construction, very abundant, still guaranteeing high thermal mass and other thermo-acoustic properties without compromising cost would be a great solution. At the same time, some qualities observed in the study of the substitution of water by cassava waste water, the residue of washing cassava, usually discarded, indicate its potential to be applied in blocks. In this scenario, this work goes through the construction system proposed from two perspectives: regarding the bioclimatic context, focusing on climatic conditions; and as for the properties of construction materials, studying their shape, constitution, resistance and even the treatment of their surfaces. Therefore, the aim of this work is to propose an earth construction system based on Brickeradobe with incorporation of cassava waste water instead of tap water. It starts from a reference study and experimental research in the laboratory in order to characterize the materials in terms of their properties, not only physical-mechanical, but also chemical- mineralogical, in which the form, the casing and the composition, the latter being defined through the formulation proposals and after the mechanical tests have been carried out. Among the main tests carried out, we did resistance compression tests at 07 and 28 days, water absorption by capillarity and thermal conductivity at 28 days for soil and water (SA), soil and manipueira (SM), soil with 10% cement and water (CA) and soil with 10% cement and manipueira (CM) cmpositions. With all formulations showing results of compressive strength above 1 MPa, with three of them above 2 MPa, and the composition with only soil and manipueira obtaining resistance values similar to the cement and water formulation, the potential of manipueira as a catalyst by favoring some cationic exchanges and improving the workability of the material, facilitating its compaction and generating denser blocks. Subsequently, two houses with 1m² of internal area and 1.50 m in height were built at UFRN, in which execution time, costs and their thermo-acoustic performance were measured through monitoring. Regarding the thermal properties, the Thermal Resistance, Thermal Transmittance, Solar Callus Factor and Thermal Delay of the blocks isolated and inserted in the system were also evaluated, obtaining excellent performance, while still being about 20% cheaper than the conventional masonry system, but requiring more physical effort.

 


BANKING MEMBERS:
Presidente - 1149564 - WILSON ACCHAR
Interno - 1149445 - LUIZ ALESSANDRO PINHEIRO DA CAMARA DE QUEIROZ
Externo à Instituição - CLAWSIO ROGERIO CRUZ DE SOUSA
Externo à Instituição - VAMBERTO MONTEIRO DA SILVA - IFPB
Notícia cadastrada em: 24/03/2020 15:08
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