STUDY ON HIGH PERFORMANCE GROUTS'RESISTANCE TO CHLORIDE ION EROSION

The influence of water-cement ratio on performance of grouts is studied,the mechanism of admixture to improve performance of grouts are analysed and the grouts'resistance to chloride ion erosion is studied by total chloride ion content,electric charge and chloride ion diffusion coefficient.The results show that high performance grouts with zero bleeding,no shrinking,high flowability,high ability to resist chloride ion penetration and low water-cement ratio(0.27～0.30) are developed;the direct ratio relationship between electric charge and chloride ion diffusion coefficient is induced according to Nernst-Einstein equation.Electric charge can be reduced and grouts' ability to resist chloride ion penetration can be improved largely by reducing water-cement ratio.