Abstract
In subsurface engineering applications, such as wellbore integrity, the interface between cement and steel is integral to expected functionality. The interface between steel and cement is often a structural weak point in many systems, however, the critical parameters for debonding evaluation are poorly understood and derived from outdated experimental procedures. Through experimental debonding tests, this study aims to analyze the tensile bond strength and fracture parameters and their sensitivity to cement composition with a pozzolanic additive (fly ash). Neat Class G cement testing resulted in an average tensile bond strength of 0.223 MPa, an average contact stiffness of 2.94x108 N/m3, and an average critical fracture energy of 163.18 J/m2. Samples treated with 40 wt.% fly ash resulted in an average maximum tensile bond strength of 0.368 MPa, an average contact stiffness of 4.07x108 N/m3, and an average critical fracture energy of 283.26 J/m2. The higher average maximum contact stiffness, maximum tensile strength, and critical fracture energy of the fly ash samples indicate a stronger bond over neat Class G cement under ambient curing conditions. The results support the capability of fly ash enhanced cement to improve bond strength, reducing the chance for delamination under ambient conditions.
Recommended Citation
C. M. Potter et al., "Comparative Analysis of Critical Bond Strength Parameters of Neat Class G Cement and Fly Ash Enhanced Cement to Steel," 58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024, article no. ARMA 24-581, One Petro, Jan 2024.
The definitive version is available at https://doi.org/10.56952/ARMA-2024-0581
Department(s)
Geosciences and Geological and Petroleum Engineering
Publication Status
Available Access
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 One Petro, All rights reserved.
Publication Date
01 Jan 2024
