The use of the prestressed pipe grouting agent1

1. Prestressed reinforcement, anchorage, fixture, such as installation, exert prestress, and should meet the design requirements such as grouting, in line with the passenger dedicated line precast prestressed concrete beam and the provisions of the interim technical conditions. 2. Pulp slurry mixing prestressed pipe pressure water cement ratio of reference should not be greater than zero. 34, it is recommended that the water cement ratio of 0. 29 - 0. 32, actual water-cement ratio should be according to the test. In a blender into actual batch - 80% of the water 90%, start the mixer, even all grouting agent, and to join the stirring, then add all cement. All powder stir in slow 2 min, and then quickly stir 1 min, add the remaining 10% 20% of the mixing water, stir for 1 min. 3. Slurry mixing to pressure into the channel of the duration, depending on the temperature conditions, generally in the 30 - Within 45 min.