TEXT Fan Daorong¹, Professor of Engineering, Luo Zhen², Senior Engineer, Tang Xinyu^*2,
        Professor of Engineering‚ Lei Yunlu¹, Senior Engineer
              ¹Tianjin Sinoma Engineering Research Center Co. Ltd.‚ Tianjin/China
              ²Tianjin Cement Industry Design & Research Institute Co. Ltd.‚ Tianjin/China
        *Corresponding author: