Discussion on Damaged Mechanism at Air Position of Concrete Pole in Saline Soil Area of Xinjiang#br#
1. Institute of Economic and Technical Research, State Grid Xinjiang Electric Power
Co., Ltd. , Urmuqi Xinjiang 830001, China; 2. Hotan Power Supply Company, State Grid Xinjiang Electric Power Co., Ltd. , Hotan Xinjiang 848000, China; 3. College of Water and Architectural Engineering, Shihezi University, Shihezi Xinjiang 832000, China
X-ray diffraction(XRD) analysis was applied to the damaged concrete specimen at the air position of concrete pole in the saline soil area (Hotan area) of Xinjiang, it was found that ettringite, calcium carbonate and other hydration products existed in the concrete sample, indicating that the concrete was subjected to sulfate attack and carbonation. Phenolphthalein reagent analysis showed that the carbonation of concrete specimen was very severely, and the carbonation depth of concrete was from the surface of the concrete to the surface of the steel bar, causing the steel reinforcement was corroded. The based concrete was prepared with low water binder ratio (below 0.4) and mixed with fly ash, silica fume and other admixtures, which could improve the strength of the concrete. The durability of concrete poles could also be improved by using slow cooling during steam curing process.
廖孟柯, 梁钢, 付林, 曾宁, 周阳. 混凝土电杆地上部位侵蚀破坏机理探讨[J]. 水泥技术, 2022, 1(3): 92-96.
LIAO Mengke, LIANG Gang, FU Lin, ZENG Ning, ZHOU Yang. Discussion on Damaged Mechanism at Air Position of Concrete Pole in Saline Soil Area of Xinjiang#br#. Cement Technology, 2022, 1(3): 92-96.