The Shuozhou grouting material - the workability of high performance grout 
 The grout is its fluidity, plasticity, stability and compactness, the combined effect of some basic properties of the plastic state of the grouting material mixture. High performance grout, Shuozhou grouting material should have good working and fresh grouting material, not hierarchical the Shuozhou grouting material in the molding process, not segregation, the mixture of grouting material should have high mobility, full of easy to model; pumping the grouting material, natural dense grouting material with good pumpability, self-compacting properties. 
 Compared with ordinary grouting materials, high performance grouting material cementitious materials increases, although the mobility of the mixture, but the viscosity increases, the deformation will take some time. Commonly used in high-performance concrete supplementary cementitious materials are mainly ground slag, pulverized fly ash and silica fume, high performance grout, their content, fineness and particle size distribution will affect the grout. , 
 Generally do not use a single slump value of the grouting material to evaluate the workability of high performance grout. In theory, the rheology of high-performance grout is still similar to the Bingham fluid can be used to yield shear stress and plastic viscosity of the two parameters to express their rheological properties. In practical engineering, the use of deformation and deformation rate of the two indicators is a comprehensive reflection of the high-performance grout work is more reasonable. Based on this theoretical basis, many scholars have proposed some method of evaluation of high-performance concrete work, the University of Texas of Er worldwide test summary lists a total of 61 kinds of test methods, which is used to workability test method 46, there are eight kinds of mortar and paste test seven kinds of self-compacting grouting material testing methods. 
 High performance grouting material Features 
 ▲ as early as high-strength cast 1-3 days of strength up to 30Mpa, shorten the construction period. 
 ▲ gravity state site just add water, stir, directly into the equipment base, mortar gravity construction free vibration, to ensure that no vibration, and long-distance grouting. 
 The the ▲ micro-expansion of the casting body long-term use of no shrinkage, and to ensure that equipment and basic close contact between the foundation and the basis contraction and expansion of the compressive stress to ensure long-term safety operation of equipment. 
 The the ▲ anti-oil seepage in the oil soak for 30 days after its strength increased by more than 10%, forming the body, compactness, impermeability to adapt to the base oil spill environmental protection. 
 ▲ durability 200 million cycles fatigue test, 50 no significant changes in freeze-thaw environment test strength. 
 ▲ weather is good long-term safety of -40 ℃ ~ 600 ℃ 
 ▲ low alkali corrosion strict control of the alkali content of raw materials, for suppression requirements engineering in alkali - aggregate reaction. 
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