Mix Proportion Parameter Optimization and Macro-Microscopic Response Analysis of Stabilized Soil Based on Thermodynamic Model
GE Jinyu
XU Fei
HAN Xuesong
QIAN Wenxun
MENG Xingyu
Abstract：A chemical thermodynamic model to predict the mineral composition of stabilized soil under varying water contents,stabilizer dosages,and incorporation methods(internal and external mixing)was established.Based on the simulation results,key mix proportion parameters were identified and used to prepare representative samples.The macroscopic compressive strength,XRD patterns,and 29Si NMR spectra were analyzed to investigate the response mechanisms of the mix proportion parameters.The results demonstrate that the thermodynamic model reliably predicts the evolution of mineral phases in stabilized soil.The stabilizer dosage significantly influences the formation of reaction products,while water content has a relatively minor effect.The strength development is primarily governed by the total amount of reaction products,the n(Al)/n(Si)ratio,the proportion of hydrated aluminosilicate gel in the cementitious system,and the mean chain length of all gel phases.These factors should be incorporated into thermodynamic simulations to improve the accuracy of mix proportion design.
Keywords：stabilized soilthermodynamic modelmix proportion parameterstabilization mechanismquantified analysis
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：9( 104-112 )