Banca de QUALIFICAÇÃO: HENRIQUE COMBA GOMES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : HENRIQUE COMBA GOMES
DATE: 26/05/2023
TIME: 10:00
LOCAL: Belo Horizonte
TITLE:

CO₂ sequestration by recycled aggregates from construction and demolition waste and their application in concrete

KEY WORDS:

Construction and demolition waste. CO 2 capture. Carbonation.
Carbon credit market. Sustainability.

PAGES: 80
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The construction industry (CI) plays a fundamental role in the social and
economic development of a country. However, it generates significant environmental
impacts regarding the generation of construction and demolition waste (CDW). The
management of CDW is one of the main challenges for sustainable development,
being a solution the recycling ofthese materials in the form of aggregates. The
carbonation process occurs through contact between atmospheric carbon dioxide
(CO 2 ) and calcium ions (Ca) present in cement, reacting and generating calcium
carbonate compounds (CaCO 3 ) that are permanently coupled to cementitious
materials. With the consolidation of carbon credit markets, materials that can capture
CO 2 have gained prominence for their ability to trade carbon emission rights in these
markets. The commercialization takes place through the trade of "units", which is
equivalent to the right to emit one ton of CO 2 . In this sense, researchers have studied
the feasibility of capturing CO 2 through recycled aggregates. Therefore, this work
seeks to evaluate the capacity to capture CO 2 through recycled aggregates produced
from crushed concrete. For this, the porosity of the concretes will be evaluated before
crushing to confirm the potential of CO 2 capture by the recycled aggregates produced
by it. Then, the CDW aggregates will be carbonated and successive measurements
will be made by means of the mass gain method, thermogravimetry (TGA) and x-ray
diffraction (XRD) will be performed to calculate the degree of carbonation of the
aggregates and the CO 2 captured. Subsequently, the carbonated aggregates will be
applied to concretes and their influence on the properties of these composites will be
evaluated by means of mechanical and durability tests. As a result, it is expected to
confirm the possibility of CO 2 capture by recycled concrete aggregates. In addition, it
seeks to promote sustainability in the field of building materials aiming at sustainable
development.

COMMITTEE MEMBERS:
Presidente - FLAVIA SPITALE JACQUES POGGIALI
Interno - CONRADO DE SOUZA RODRIGUES
Interno - AUGUSTO CESAR DA SILVA BEZERRA
Externo à Instituição - ANTÔNIO ACACIO DE MELO NETO - UFPE
Externo à Instituição - JOÃO PAULO DE CASTRO GOMES