The Changzhou grouting material - ground slag grouting material in the durability 
 Doped ground slag mortar tests showed that the seepage coefficient may be reduced by 100 times. The same time, the diffusion coefficient will be significantly reduced, especially the chloride diffusion coefficient. 
 Doped ground slag grouting material test is the grouting material has good resistance to chloride ion performance. Dauber and Bakker also shows that when finely ground slag content of not less than 60% of the total mass of cementitious material and cement ratio of 0.50 when concrete chloride ion diffusion coefficient containing only portland cement grouting material, Shandong grouting material Changzhou grouting material at least 10 times. 
 The positive role of the ground slag is mainly due to the microscopic structure of the hydration water slurry is more dense and more gap the CSH filling (compared with Portland cement slurry containing only) 
 Because the microstructure of Portland cement - ground slag composite system can be improved. And lower content of calcium hydroxide, thus the sulfate resistance of grouting material is also improved, Hooton and Emery mortar test showed that the composite containing 50% ground slag cement and Type I Portland cement (of C3A content of 12 %) showed resistance to sulfate with sulfate resistant cement (V -) the same performance. In order to effectively play the positive role of the ground slag ground slag content should be at least the total mass of cementitious materials 50%, preferably 60% to 70%. 
 Doped ground slag grouting materials, of Changzhou grouting material with low permeability is also conducive to the control of alkali - aggregate reaction, can significantly reduce the migration of alkali, alkali absorption through the ground slag hydration products to achieve, especially when high temperatures. Can be alkali reactivity of siliceous aggregate or Portland cement content of 1.0%, this positive role of the ground slag is vital. 
 Frost durability of the situation is different. Mixed with ground slag and a proper co-ordination than the preparation of grouting material, the frost durability and containing only portland cement grouting material, Changzhou grouting material. However, the incorporation of ground slag grouting material caused no positive role. In view of the ground slag grouting material impermeability improvement, but why the incorporation of the ground slag can not improve the frost durability of grout is not clear, but its role in the form of the positive effects of lower water-cement ratio. Therefore to note that the grouting material is exposed to deicing salt, ACL318-02 provisions of the ground slag content shall not exceed 50% of the total mass of cementitious materials. When ground slag and Fly Ash, the quality of both shall not exceed 50% of the total mass of cementitious materials; content of fly ash shall not exceed 25%. 
 To point out that, in order to make the doped ground slag grouting material containing only portland cement grouting material to achieve the same frost resistance requirements must be extended exposure to freeze-thaw cycle before the grouting material, Shandong grouting material, Changzhou grouting material wet raising time. 
 To point out that, in order to make the doped ground slag grouting material and anti-icing salt containing only portland cement grout spalling properties required exposure time must be extended before the freeze-thaw cycle of grout wet raising. Virtanen had been reported, and the mixture mixed with ground slag to help improve the grouting material, Changzhou grout material to achieve the same anti-deicing salt spalling properties, but this is unconfirmed. 
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