CGM-320A grouting material bearing a range of applications ??????????????????????????????????????? ??????? ??? for a variety of precast erection of grout, grout used between the bearing plate and bearing pad stone piers. ? Second, product characteristics ????????????????????????????????? l ??????? ultra-early strength; excellent fluidity; l ??????? longer working hours; economy; l ??????? dense, no shrinkage; no rust, no metal aggregate; l ??? ???? facilitate construction; non-chlorinated Third, performance indicators ??????????????????????????????????? ??????????????????????????? ????? Model performance indicators CGM-320A fluidity (mm) ≥320 30min fluidity ( mm) ≥240 bleeding rate (%) 0 compressive strength (Mpa) 2h≥20 / 28d≥50 56d of not less than 28d 90d test results test results is not less than 56d flexural strength (Mpa) 24h≥10 elastic modulus (Gpa) 28d≥30 28d free expansion rate (%) 0.02 - 0.1 The above data are in standard laboratory controlled conditions measured. Unit volume: about 2200Kg m3 test based /:? Technology group [2005] No. 101 Railway Bridge rubber bearing basin Temporary technical conditions Fourth, the construction method ????????????????? ?????????????????????? ??? 1, the holder is attached to the beam at the end, should be installed so that the center line of symmetry symmetrical bearing floor and beam midline coincidence, the deviation not greater than 0.5mm; successive bearing bolts tightened, the tightening of the bolts should be basically the same; bolt after completion, not a gap between the stand and the beam bearing plate. ??? 2, the bolt-hole in the bearing bolt, the bolt protruding nut length is 0.25 times the diameter of the bolt. Nuts and bolts fastening the sleeve to prevent the bottom surface of the sleeve bearing bolt and junction leakage of plasma. ??? 3, on a support pad stone mark the vertical and horizontal symmetry bearing centerline. Bearing pad stone surface roughening, removing debris left in the bolt hole, with water bearing pad stone surface wet saturated, but may not have clear water construction. Then in the top surface of the support pad stone 20-30mm thick layer of non-shrink mortar M50 dry hard and compacted, surface roughness, pay attention to the amount of compression mortar elevation beam after falling mortar should be considered. Remove debris left in the bolt hole and front beam position within 30min, the bolt hole perfusion CGM-320A to the support pad stone below the top surface of 15mm. ??? 4, pulp press powder: water = 1: 0.17 (weight ratio) preparation. Water was added to the mixing bucket should be first, and then gradually added weighed grout, side by side feeding electric mixer gun stirred until the powder all finished, then continue stirring for 2-3 minutes, the slurry evenly. The mixed slurry should be completed within 25 minutes infusion. ??? 5, so that the holder should be off the beam centerline and bearing pad stone top longitudinal centerline coincides laterally symmetrical. After the fall of the beam should be dry, rigid non-shrink mortar M50 conservation. After ??? 6 until bolt hole filling material reaches a predetermined intensity, fastening bolt, bearing temporary removal of the connecting plate, mounting bracket seal panels.