Requirements of Cement mortar inner anti-corrosion material

Cement mortar inner anti-corrosion material should agree with the following requirements:

(1) not use feed water pipe water quality pollution, hazardous to human well-being admixture.

(2) shall not be used in the construction of pipelines is corrosive and pollution of water quality of anti-corrosion materials.

(3) mortar mixing water should be chosen for cement mortar strength, durability, no clean water.

In anti-corrosion coating steel pipe.

Buried  tube inner anti-corrosion, selects the hanging galvanized barbed wire, spray the compressive strength is not less than 30 n/was cement mortar lining. The cement mortar cooperation than is that water: cement, sand = "0:27 0; Choose day water; # 525 Portland cement; Strong, clean, grading outstanding natural sand, silt content less than 2% maximum diameter less than 1.2 mm.

Cleaning: in the steel tube equipment, welding, backfill soil, such as vertical displacement after the inspection, with steel wire wheel brush thoroughly clean pipe internally floating rust, scale, welding slag, oil, etc.

Bang, galvanized barbed wire laying barbed wire diameter 3 mm, 50 mm x 50 mm, grid scale mesh from 10 mm, the bottom of the steel tube arc length 1380 mm is not within the scope of laying barbed wire, so that the spraying car walks; Barbed wire and tube wall between pad diameter phi long 6, 7 mm of Q235 steel, spot welding connection, the distance is 350 mm, 9 mm carbon steel pipe wall is apart from the wire appearance.

Mechanical spraying cement mortar: two spray layer, the first layer of spray for 10 ~ 12 mm thick, try & test & big $second spray 8-10 mm, ensure that blow grind flat lubrication.