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Structural Engineering and Mechanics
  Volume 76, Number 4, November25 2020 , pages 541-550

Performance of BMSC column with large eccentricity under natural exposure conditions
Haiyan Ma, Xiangchao Zeng, Hongfa Yu, Peng Yue, Haiwei Zhu and Chengyou Wu

    As a new type of concrete material, basic magnesium sulfate cement concrete (BMSC) has the advantages, such as early strength, high strength, good toughness and crack resistance. However, it is unclear about the degradation of the mechanical properties of BMSC columns, which is exposed to the natural environment for several years. In order to apply this new concrete to practical engineering, six large-eccentricity compressive columns of BMSC were studied. The mechanical properties such as the crack propagation, failure morphology, lateral displacement and bearing capacity of BMSC column were studied. The results show that the degradation rate of ultimate load of BMSC column is from 6% to 7%. The degradation rate of the stiffness of the column is from 6% to 13%. With the increase of compressive strength of BMSC, the axial displacement and lateral displacement are gradually reduced. The calculation model of bearing capacity of the BMSC column under the large eccentric compression is proposed. This paper provides a reference for the application of BMSC columns in the civil engineering.
Key Words
    basic magnesium sulfate cement concrete (BMSC); column; natural environment; steel corrosion; large eccentric compression; crack; bearing capacity; stiffness
Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China

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