Quantitative Analysis of Carbonation Degree of Mortar Based on Multiple Interactive Influences

This study conducts quantitative analysis of the degree of mortar carbonation under the influence of a multi-dimensional interaction. The HABT method is used to determine the degree of mortar carbonation and is compared with the TGA method. The result shows that the determination result of the HABT method is only 3.86% higher than that of the TGA method. This method is suitable for determining the degree of carbonation. The study analyzes the influence of factors such as water-reducing agents on the degree of carbonation, demonstrates the relationship between pore structure and mortar carbonation, and explores the degree of carbonation of corner areas and general edges. It is found that as time prolongs, the degree of carbonation and carbonation depth will no longer show a linear relationship. Carbonation time also affects the direction of the carbonation front line and the effect of water-reducing agents on concrete carbonation. The degree of carbonation is linearly related to carbonation time and the number of exposed surfaces. The water~cement ratio and the number of exposed surfaces affect the porosity of concrete. There is interaction in the multi-dimensional area of mortar. The degree of carbonation at two-dimensional corners is 1.20~1.25 times that at general edges, and the degree of carbonation at three-dimensional corner areas is 2.03~2.11 times that at general edges. Accounting based on general edges will underestimate the carbon sink capacity of mortar structures.