Fuzhou pressure slurry application purpose and construction key points

Fuzhou pressure paste is a dedicated to method of post-tensioned prestressed pipe ( Hole) grouting construction products by a variety of high quality cement base material and the optimized distribution of high performance admixture, excellent liquidity, stable slurry, filling degree of good, adjustable setting time, no shrinkage, micro expansion, high strength, do not contain harmful to the steel material, etc. Prestressed reinforcement, fuzhou pressure slurry application purpose protection from corrosion, to ensure the safety of prestressed structure to ensure the cohesive force between the prestressed reinforcement and concrete, let the prestressed transfer between them, make the combination of prestressed reinforcement and concrete. Elimination of prestressed concrete structure under repeated load stress fatigue damage caused by the change of anchorage, prolong the service life of anchorage, improve the reliability of structure. Second, fuzhou pressure the construction water slurry material ratio of 0. 26 ~ 0. 28, may be adjusted according to different grouting parts. First of all in a blender into actual batch - 80% of the water 90%, start the mixer, uniform to join all pressure slurry, join while stirring. Powder join completely, and then quickly stir 3 min, add the remaining 10% 20% of the mixing water, continue to stir 2 min. Pressure from mixing to paste into the channel of the duration, depending on the temperature conditions, generally in the range of 30 ~ 1 h. Pressure slurry before use and injection process should be continuous stirring, to maintain the uniformity of slurry and liquidity. Grouting should be used when the piston pump pressure or vacuum pump, pressure must be greater than zero. 7MPa。 Grouting slurry temperature should be kept at 5 ℃ - Between 30 ℃, otherwise measures should be taken to meet the conditions.

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