Comparative effects of CO-curing condition on phase assemblage and mechanical response of CS pastes; Insights from atomic, crystallographic, and macroscopic deformations

Cho, S.*; Im, S.*; Tominaga, Aki; Shobu, Takahisa  ; Bae, S.*; 5 of others*

This study investigates the microstructural characteristics of CS pastes subjected to various CO- curing regimes and their deformation mechanics at atomic, crystallographic, and macroscopic scales. Specifically, the effects of CO delivery methods and curing pressure are compared. In this studies conditions resulted in severe oscillation in the crystal and atomic scale stress-strain curves due to significant inhomogeneity in the matrix, as evaluated based on the radial distribution of pores. Enclosed CO with atmospheric pressure induced the formation of homogeneous and interlocked structures imparting constant strain propagation. This multiscale stress-strain analyses suggest that a uniform phase distribution facilitates load transfer between reaction products, thereby possibly improving mechanical performance. Additionally, these findings provide advanced insights into the relationships between CO-curing conditions, phase assemblage, and mechanical response.