Banca de DEFESA: Daniel Rodrigues Freire Ramos

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Daniel Rodrigues Freire Ramos
DATE: 09/02/2026
TIME: 16:00
LOCAL: Auditório do Laboratório de Cimentos
TITLE:

Use of LC3 as an alternative material to Portland cement class G for plugging operations 

KEY WORDS:

alternative cement; rheological parameters; permanent grouting; supplementary cementitious materials; Portland cement Class G

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

The significant and increasing number of oil and gas wells requiring permanent abandonment at the end of their service life demands low-carbon and cost-effective materials for this purpose. Limestone Calcined Clay Cement (LC³) is a low-carbon blended cement with high potential as an alternative to Portland cement. LC³ formulations with 40% to 60% replacement of Class G Portland cement, a metakaolin/limestone ratio of 2:1, and a water-to-binder ratio of 0.51 were evaluated and compared with a reference slurry containing 100% Portland cement. Rheological properties after curing at 60 °C were assessed, as well as mechanical and microstructural responses at curing ages of 24 h, 3, 7, and 28 days. LC³ demonstrated potential for plug and abandonment applications by exhibiting lower densities than the Class G cement slurry and higher compressive strength than the reference, reaching 20.2 MPa at 24 h and up to a 23% increase at 28 days, thereby meeting the physical barrier requirements established by ANP Resolution No. 46/2016 and NORSOK D-010.

COMMITTEE MEMBERS:
Interna - 2621720 - ANA CECILIA VIEIRA DA NOBREGA
Externo ao Programa - 1804366 - JÚLIO CÉZAR DE OLIVEIRA FREITAS - UFRNExterno à Instituição - BRUNO LEONARDO DE SENA COSTA - UFRN
Externo à Instituição - GLAUCO SOARES BRAGA - IFRN