Cement curing time influence to the accuracy of EDTA titration

EDTA titration method is widely used to detect the cement dose of the Cement Stabilized Soil in highway, generally before final setting of cement, with little influence from cement curing time. However, owing to project requirements testing must be done after a specified period. Cement curing time which is longer than the prescribed period has great influence on the experimental results. The laws of the hydrolysis and hardening process of cement and its microstructure with the cement curing time changing were studied. EDTA consumptions with different cement curing time were obtained in laboratory. Improved EDTA titration method considering cement curing time was proposed.