Anhui, Shandong and grouting material - in the grouting compound doped high-quality mixed material 
 Micro-cracks in the grouting compound mixed with an appropriate amount of fly ash and other mixed materials, can improve the pore structure of the grouting material to reduce the cement hydration to improve the performance of cement hydration heat, reduce because of grouting materials expand and contract to produce large cracks. 
 With fly ash grout frost resistance of different opinions, fly ash mixed with grouting material, the early strength development is slower, may affect the frost resistance of the grout, but with the growth of the age, pulverized gray ash effect gradually filling effect and micro-aggregate effect manifested, frost resistance with the compressive strength of grouting material to improve. The author is at the same time doped with fly ash, air-entraining agent grouting material, Anhui grouting material tested to show that, doped with 0.027% GYQ high performance grouting material air-entraining agent, 20% of the Class I fly ash C5O Concrete 225 freeze-thaw cycles, its relative dynamic elastic modulus can still hold 77.3%. GYQ high-performance concrete air-entraining agent dosage increases to 0.03%, doped with 20% fly ash concrete after 225 freeze-thaw cycle relative dynamic elastic modulus, reaching 98.5%. The test also showed that concrete with fly ash at the same time-doped air-entraining agent than gas agent frost resistance of concrete doped lead only about 50%. 
 In the grout, Anhui, grout, grouting compound mixed with fly ash, Shandong, is conducive to the improvement of the grouting material resistance to chloride ion penetration, with the growth of the age, the effect is more obvious. Doped with 30% fly ash grouting material, 63% of the 84d age of the chloride ion permeability coefficient only with fly ash ordinary grouting material. 
 Mixing the ground slag grouting material, other treatment, frost resistance grouting material close to or somewhat less. The test proved that either fly ash or slag, mixed with grouting materials, grouting material by freeze-thaw cycle, the surface spalling serious than ordinary concrete. I doped ground slag or fly ash in concrete, the introduction of a small amount of multifunctional additives, antifreeze capabilities significantly improve. 
 Fly ash grouting material, the impermeability of the doped ground slag grouting material is significantly improved. Ground slag content of 60% of the grouting material, 25% to 35% of the chloride diffusion coefficient is only ordinary grout. 
 The durability of silica fume grout better than that of silica fume grout material, Anhui grout, the Shandong grout durability. Experimental studies have shown that: after 300 freeze-thaw cycle, water-cement ratio is 0.6 silica fume grout, Frost injury resistant and water-cement ratio of 0.48 ordinary concrete is quite. Ordinary grout at 20 ° C, the permeability coefficient of 7.2 * 10-12m / s, while the doped 10% silica fume grout material permeability coefficient of only 0.5% 10-12m / s. The trial also been doped with 8% silica fume chloride ion diffusion coefficient of only ordinary grouting material diffusion coefficient of 7.3% addition of silica fume grout material has been alkali-aggregate reaction and strong resistance to sulfuric acid erosion. 
 It is worth noting that the drops of water-cement ratio grout material of silica fume, improper maintenance, easy to produce shrinkage cracks. Once the grouting material, Anhui grouting material cracking, its durability will be greatly reduced. 
 Poor grouting compound with fly ash, silica fume, ground slag, proper control of their content. Whether it is the increased possibility of fly ash and slag or silica fume, the doped excessive poor grouting materials are prone to carbonation lead to steel corrosion. 
 In order to improve the grouting material, the grouting material of Anhui, Shandong, the durability of the grout can be fly ash, slag, silica fume admixture complex doped. I tested; when the fly ash and ground slag to the 1:1 complex doped grouting material's resistance to chloride ion erosion than one admixture grouting material resistance to chloride ion erosion ability, but when the fly ash 30%, increasing the relative content of fly ash with the total content of the slag, the grouting material weakened resistance to chloride ion penetration. Therefore, the admixture of fly ash, slag and other complex doped, the raw materials used for different engineering and suffering in one of the best complex doped proportion. 
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