TY - Journal of Yangtze River Scientific Research Institute A1 - YANG Jing T1 - Characteristics of Freeze-thaw Damage of Pore Structure in Concrete Material Using Nuclear Magnetic Resonance Technology Y1 - 2020-04-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 127 EP - 131 VL - 37 IS - 4 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20190045 ER -