Railway Bridge in the pot rubber bearing special grouting material 
 Products Railway Bridge in pot rubber bearing grouting material is a high performance polymer modified cement-based grouting materials, ingredients from high-strength cement, super plasticizer component, expansion component, preferably high-strength micro-aggregate composition and some trace modified components to the appropriate proportion of common grinding made. React with water to generate a lot of expansion of the crystalline mineral - hydration sulphoaluminate, in order and no shrinkage of the material itself; the material flow, good construction can gravity leveling, long operating time, and after the completion of smooth surface, to overcome the traditional mortar produced by the uneven, cracking, spalling, since the powder shortcomings. Whose performance is completely the scope of application to meet the requirements of the Railway Bridge in pot rubber bearing provisional technical conditions " 
 Mainly used for repairs, anchor grouting bridge bearings, rail anchor grouting, especially suitable for high-speed rail passenger line, highway bearing grouting. 
 Advantages 
 Mobility: the case of water-cement ratio is very low, with great fluidity, and can completely fill the perfusion space, and to achieve self-leveling and self compacting. 
 2, the micro-expansion: the fill site does not produce contraction; ensure that the bonding at the seamless, not loose, so that the load function effectively passed on to the base. 
 3, the early strength and high strength: one day compressive strength greater than 40 MPa, 28 days is greater than 60 MPa, the late high strength and without retraction. 
 4, stable performance: the grouting material is fully cured, resistant to oil and acid corrosion. 
 , Durability: inorganic grouting material, there is no aging, no corrosion of steel, durable and sturdy for the ground, good wear resistance. 
 6, construction of low negative temperature: low temperature, the negative temperature strength still greater growth, to effectively solve the problem of winter construction and other 
 7, easy to use: Finished open bag on site mixing with water can be used. 
 Performance indicators 

 The pilot project Railway Bridge disc rubber bearing provisional technical conditions "require test results 
 2H20 type 8H20 8H25 type 
 Setting time (min) initial setting ≥ 30 35 
 50 
 45 

 The final setting of less than 180 45 
 70 
 60 

 Fluidity (mm) initial ≥ 320 340 
 350 
 350 

 30min 
 ≥ 240 280 
 320 
 300 

 Compressive strength (MPa) 2h 
 - 22.4 
 - 
 8h 
 ≥ 20 / 
 24 
 28 

 12h 
 ≥ 25 / 
 30 
 / 

 24h 
 ≥ 40 / 
 42 
 / 

 28d 
 ≥ 50 75 
 65 
 70 

 56d 
 Without lowering does not reduce do not reduce without reducing 
 90d 
 Without lowering does not reduce do not reduce without reducing 
 Flexural strength (MPa) 24h 
 ≥ 6 10.5 
 6.4 
 10.3 

 28d 
 ≥ 8 / 
 8.5 
 / 

 56d 
 ≥ 10 / 
 10.4 
 / 

 28 days of the modulus of elasticity (GPa) ≥ 30 32 

 28 days of the vertical expansion ratio (%) ≥ 0.1 0.14 

 Shrinkage (%) 28 days <20 

 Bleeding rate (%) 0 
 0 


 Use 

 Need filling in the base surface cutting hair treatment, to remove dust, grease and other dirt is not conducive to bonding material; repair cracks and other defects; installation grouting template; water bearing pad stone surface wet to saturated, but construction may be left Mingshui. 
 Install the bearing in place, steel wedge wedge bearing four corners, leveling bearings and bearing adjustment to the design elevation, set aside 20 ~ 30mm gap between the bearing underside of the bearing pad stone, in order to grouting. 
 According to the time of construction area or unit construction area of ??the powder volume and water consumption, each mixing should ensure that the mortar lose all construction is completed before leveling. 
 . Pulp powder: water 1:0.14-0.15 (weight ratio) preparation. First adding water to the mixing barrel, and then gradually adding weighed a good grout, edge cast with electric mixer to stir the material side, until the powder plus all finished, and then continue to stir for 3 to 4 minutes, the slurry evenly. 
 The slurry after mixing evenly down to deal with a good base surface, self-leveling can be. Gravity grouting way perfusion bearing at the base and anchor bolt hole gap. The grouting process should be bearing the center of grouting to four weeks, up from the template and bearing base plate surrounding the interstitial space observed all filled with grouting material. 
 Leveling should be completed within a construction time of construction after the machines should immediately rinse well with water. 
 Grouting material after the final setting, removal of formwork and steel wedge, to check whether tainted slurry at the slurry leakage at the fill plasma, and fill in plugging the gap in the steel wedge out the bearing plate anchor bolts, tighten the next. 
 8 to be pouring the beam concrete, timely removal of the lower bearing connection plate, and install the bearing steel hoardings. 
 9 construction time depending on the ambient temperature at 20 ° C for mixing completed within 30 minutes. 
 10 The amount of material 2100 ~ 2200Kg/m3 
 Note 

 Has a great influence of temperature on setting time and early strength of the product, the use of low or high temperature, the user be explained by the technical staff of our center through the experiment to be adjusted to meet the engineering requirements. Unable to restore the flow of the slurry should not not again add water mixing.