Post-tensioned prestressed pipe pressure slurry should pay attention to what matters

Prestressed pipe pressure slurry post-tensioned prestressed pipe pressure slurry prestressed pipe size 1, appropriate USES special pressure slurry to settle matters later prestressed pipe or special grouting beauty seam an agent configuration of slurry pressure drop. 2, cement should be not less than 42 stable performance, strength grade. 5 low alkali silicate or low alkali ordinary Portland cement. 3, plus the seam an agent should have good compatibility with cement, and shall not contain chlorine salt and nitrite or other have corrosion on prestressed reinforcement effect. Water reducing the seam an agent should use high efficiency water reducing the seam an agent, water reducing efficiency of not less than 20% 4, mineral admixtures varieties appropriate for class I fly ash, ground granulated slag powder or silicon powder. 5, water should not contain harmful for prestressed concrete or cement, more than 350 mg per litre of water shall not contain chlorine ion or any other organic matter, appropriate USES accord with national health standards of clean drinking water. 6, expansion the seam an agent appropriate USES ettringite is beauty or composite expansion seam an agent, shall not be used for aluminium expansion source of beautiful seam an agent or total alkaline 0. More than 75% of high alkali expansion seam an agent. Of chloride ion content in July and grouting materials should not exceed 0 gelled material. 06%, the specific surface area should be more than 350 m2 / kg, sulphur trioxide content should not be more than 6. 0%.