Banca de QUALIFICAÇÃO: JOÃO VICTOR SANTANA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JOÃO VICTOR SANTANA SILVA
DATE: 30/11/2023
TIME: 14:00
LOCAL: Belo Horizonte
TITLE:

Analysis of partial replacement of Portland cement with retorted shale and oil shale ash in cement pastes

KEY WORDS:

Cement-based composites; Durability; Mechanical properties; Oil shale ash; Portland cement; Sustainability.

PAGES: 60
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

This research addresses the urgent need to explore more sustainable alternatives for cement and concrete production, motivated by the growing increase in CO₂ emissions and the considerable consumption of natural resources in the construction industry. The study assesses the feasibility of incorporating retorted shale (XR) and oil shale ash (CXB) as partial substitutes for Portland cement in cement pastes. The objectives include determining the ideal content of XR and CXB, the ideal temperature for burning XR in order to obtain ash, investigating the influence of parameters such as the specific surface area and chemical composition of CXB on the properties of cementitious materials, and assessing the compressive and tensile strengths of the resulting pastes. Valuable conclusions from a systematic literature review using the ProKnow-C method have already been drawn, including recommendations for optimum substitution levels of CXB, with values of up to 30%, XB burning temperature ranges, on average 700 ºC, and a trend towards improved physical and mechanical properties. In order to achieve these objectives, an experimental campaign will be carried out involving characterization tests (BET, FRX, and DRX) and strength tests (compression and traction) on cement pastes with 10%, 20%, and 30% cement replacement by XR or CXB. This research is justified by the need to reduce CO₂ emissions associated with cement production and the search for sustainable solutions for the use of oil shale (XB) and its residual ash. In other words, the results of this work are expected to confirm its potential to positively impact reducing CO₂ emissions and conserving natural resources, as well as promoting the search for more environmentally responsible solutions in the construction industry.

COMMITTEE MEMBERS:
Presidente - FLAVIA SPITALE JACQUES POGGIALI
Interno - AUGUSTO CESAR DA SILVA BEZERRA
Externa à Instituição - MARIA TERESA PAULINO AGUILAR - UFMG