Deterioration Progress in Service Performance of Cement Paste by RTM
LI Kai
WANG Pusong
SHI Caijun
Abstract：It is easy to induce calcium corrosion for cement paste in a carbonated water-rich environment,which becomes a severe threat to its service performance.In order to properly reflect the dissolution-diffusion process of CO2 in water and its interaction with cement minerals,a reactive transport model(RTM)was therefore developed,which was then utilized to study the spatial and temporal distribution of cement minerals,solutes and pore structure during groundwater erosion.In this way,the deterioration behavior of hardened cement paste can be thus assessed.The results show that generated calcite precipitation will fill in available pore space when the content of dissolved CO2 in water is low,which prevents further loss of calcium ions.Once its concentration is larger than 14.00 mmol/L,the calcite begins to decompose due to an increased acidity of pore solution,resulting in an accelerated deterioration progress of cement paste.
Keywords：cementcalcium corrosionservice performancereactive transport model
Publication Date：2026-01-31
Online Publishing Date：2026-03-17(First online date of this platform, not the publication date of the document)
Pages：10( 18-27 )