Cement pole equipment raw materials control
1. Cement should adopt 42.5 portland cement, ordinary portland cement, slag portland cement, anti-sulfate cement, or not less than 43.5MPa rapid harding portland cement. Its performance should be consistent with GB175, GB199, GB748 and GB1344 regulations.
2.Sand used in medium grained sand and shall not contain soil. Its quality should be consistent with the provisions of GB / T 14684, GB / T 14685, and in line with the provisions of GBJ204. Prestress and should comply with the provisions of GBJ204.
3. Water used clean deep well water, water quality should be consistent with the provisions of JGJ63.
4.Admixture mixed with concrete, like early strength agent and setting accelerator, their performance should be consistent with the provisions of GB8076, and it is forbidden to incorporate additives such as chloride salts.
5. Reinforced prestressed steel adopted cold pull Ⅱ level, cold pull Ⅲ level, cold pull Ⅳ, Ⅴ level steel (heat treatment), grade A cold drawn low carbon steel wire, indented wire and steel hinge silk, carbon structural steel. Its performance should be consistent with the provisions of GB1499, GB5223, GB5224 and GB4463. Non-prestressed reinforced grade I, II grade steel, its performance should be consistent with the provisions of GB700, GB701.
6. Prestressed concrete pole design strength of centrifugal concrete is not less than C50-class and design strength of centrifugal concrete is not less than C40 level. And the concrete strength should not be less than 80% of the design strength.