Date of Award
1-1-2023
Document Type
Dissertation
Degree Name
Ph.D. in Engineering Science
First Advisor
Hunain Alkhateb
Second Advisor
Ahmad Alostaz
Third Advisor
Sasan Noranian
School
University of Mississippi
Relational Format
dissertation/thesis
Abstract
Calcium-silicate-hydrate (C-S-H) is a vital component in cementitious materials, providing strength and durability. It forms during the hydration process of cement, where calcium ions react with silica-rich compounds to form a gel-like structure. The nanocrystalline units within C-S-H contribute to its unique properties and serve as a binding agent in the hardened cement paste. However, the mechanisms and impacts of nanomaterials, such as graphene nanoplatelets (GnPs), on C-S-H at the nanoscale level are not fully understood.
Incorporating GnPs into cement-based composites has shown promise in enhancing C-S-H formation and properties. GnPs possess exceptional mechanical, thermal, and electrical properties, making them attractive additives for improving the performance of cementitious materials. Understanding the interactions between GnPs and C-S-H is crucial for harnessing their potential. This study aims to investigate the impact of GnPs on C-S-H formation, including crystal growth, crystallite sizes, lattice strain, material contents, calcium carbonation, and morphology, in order to uncover the underlying mechanisms.
Additionally, the study examines the influence of pH levels, the calcium to silica molecular ratio, and the addition of the Sodium Dodecyl Sulfate (SDS) surfactant on C-S-H formation in the presence of GnPs. These factors play a significant role in shaping the structure and properties of C-S-H. By understanding the interactions between GnPs and C-S-H under different conditions, valuable insights can be gained for engineering advanced cementitious composites with enhanced performance.
Overall, investigating the C-S-H formation and the role of GnPs within this process will contribute to a deeper understanding of the behavior of cementitious materials. By uncovering the mechanisms and impacts of GnPs on C-S-H at the nanoscale, this study aims to pave the way for the development of more sustainable, durable, and high-performance cement-based materials, leading to advancements in the construction industry.
Recommended Citation
Elmahmoud, Weam, "Impact of Graphene Nano-Platelets on Calcium Silicate Hydrate Formation" (2023). Electronic Theses and Dissertations. 2676.
https://egrove.olemiss.edu/etd/2676