Banca de DEFESA: FERNANDA NEPOMUCENO COSTA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : FERNANDA NEPOMUCENO COSTA
DATA : 02/10/2020
HORA: 09:00
LOCAL: PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA CIVIL
TÍTULO:

VALORIZATION OF CIVIL CONSTRUCTION WASTE THROUGH ITS INCORPORATION IN THE CLINCHERIZATION PROCESS

PALAVRAS-CHAVES:

CCW, reuse, clinker, Portland cement, CO2 emission.

PÁGINAS: 229
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
RESUMO:

The generation of industrial waste and by-products and the increase in greenhouse gas emissions are related to human activities and population growth, bringing serious consequences if they are not controlled and mitigated. These issues have been a target of concern worldwide and have been gaining the interest of researchers and the industry in the search for solutions with technical and economic feasibility, in addition to innovative alternatives for use in civil construction. Since cement is the most widely used building material in the world, its production process demands a large amount of natural resources, in addition to high energy consumption and CO2 emissions. Thus, the cement industry has been looking for solutions and procedures that effectively reduce the use of these resources as well as emissions of greenhouse gases. On the other hand, civil construction, a major consumer of natural resources and cement itself, is responsible for the generation of a significant portion of solid urban waste (MSW), with around 60% of this, in mass, corresponding to civil construction waste (CCW). In this scenario, with the search for actions aimed at mitigating the impacts caused by the cement sector and aiming at an appropriate destination to the CCW, the present research aims to show the technical feasibility of incorporating CCW in partial replacement of the clay-limestone system in Portland clinker production. For this, the physicalchemical characterization of the raw materials used was carried out, followed by dosing, with the total replacement of the clinker clay by CCW, incorporating the mixture of 9.1 to 14.3% of its fraction slim. The raw mixes were manufactured and calcined at 1340, 1400 and 1450ºC. The clinkers were characterized mineralogically, by means of X-ray diffraction (XRD) tests, to verify the formation of the main crystalline phases formed. Subsequently, the clinkers were ground, resulting in Portland cements, which had their physical-mechanical properties evaluated, in addition to the hydration mechanism. The results showed that the partial substitution of the limestone-clay mixture provides a reduction of up to 8.1% in the CO2 emission, from raw materials, in the production of clinker, since the CCW acts as an alternative source of calcium in the formulation of the flour, partially replacing the limestone, without prejudice to the formation of the mineralogical phases of the cement, mainly the alita (C3S). The analyzes showed the potential of using the CCW, since the experimental cements presented a performance similar to industrial cements, used as a reference.

MEMBROS DA BANCA:
Externo à Instituição - Ana Paula Kirchheim
Presidente - 1779028 - DANIEL VERAS RIBEIRO
Externo à Instituição - Fabiano Raupp-Pereira
Externo à Instituição - João António Labrincha Batista
Interno - 2315713 - MARCELO STROZI CILLA