Reinforced Corrosion Problems Research In Petrochemical Structural Basis

Corrosion of reinforcement is the primary factor affecting durability of reinforce--ment concrete structure. The corrosion of reinforcement in concrete, not only can ca--use huge economic loss, can also cause damage of reinforced concrete structure, can cause even structure collapsed. Therefore, steel corrosion problem cannot be ignored. The foundation of construction structures and buildings in daqing construction area is reinforced concrete pile foundation and the pile raft foundation, petrochemical envir--onment because of pollution can corrode reinforced. According to the "petrochemical enterprises building structural design norms"and"industrial building anti-corrosion design norms"and"corrosioninhibiting admixtures use technical regulation stipulates that in corrosive environment "should adopt reinforced resistance rust measures. Pre--viously, petrochemical base structure of reinforced by asphalt daub on anti-corrosion processing. But asphalt daub increase Engineering cost, and anticorrosive effect will be extended by time and gradually becomes poor. So, the owner decided to take the low permeability Concrete add Rebar Inhibitor measures to protect the steel.Petrochemical environmental degradation of reinforced concrete structures consists of concrete degradation and steel corrosion. Concrete degradation contains chemical etching carbonation and chemical corrosion, steel corrosion is mainly chemical corrosion, including chloride corrosion and sulphate corrosion.Through orthogonal test to determine the important factors that affect steel corrosion. Orthogonal experiment results show that the reinforced section radial corrosion depth speaking:PH value is a important factor, with the lower PH value, reinforced section significantly increased the radial corrosion depth; Chlorine is second-class important factors, which could be used in the engineering level; it's good Erosive CO2, sulfate and HCO3- is the secondary factors, the three factors for levels of four reinforced section radial corrosion depth caused by difference is small. Orthogonal experiment test results also show that the PH value high, erosive medium density variations on reinforced section radial corrosion depth almost no effect; PH lower, erosive medium density variations on reinforced section has certain influence on the radial corrosion depth. Namely the lower PH value, as erosive medium density change radial corrosion depth of reinforced section also obvious effect.Through orthogonal experiment proved foundation with low permeability concrete and corrosion inhibiting admixtures in the petrochemical environment is a feasible measure.