【摘 要】
：
Impermeability of tunnel structural material after exposure to high temperature determines residual service life and security. The present study explores imperm
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
Impermeability of tunnel structural material after exposure to high temperature determines residual service life and security. The present study explores impermeability deterioration and water absorption change (expressed as w(T, t)) of tunnel structural material after exposure to 200 ℃,300 ℃, 400 ℃,500 ℃, and 600 ℃ respectively. Structural cementitious material was devised according to the requirements of segment used in Yangtze River tunnel of Wuhan which has been in constructing. Effect of high temperature on impermeability is evaluated by impermeability deterioration factor (abbr. IDF) and w(T, t).Testing results indicate that impermeability of concrete decreases with the increase of temperature up to 600 ℃, and serious impermeability deterioration occurs at temperature above 300 ℃. Furthermore,concrete with higher impermeability is more sensitive to high temperature above 400 ℃.
其他文献
A super-hydrophilic functional ceramic was prepared by adjusting the chemical components of ceramic glaze. Effect of surface free energy of ceramic glaze on oil
Primary mirror is one of the key components in the space remote sensing system. To minimize the mass of the mirror without compromising its stiffness and decrea
The microstructure and microhardness of Sn-3.5%Ag solders were explored in the cooling rate ranging from 0.08 to 104 K/s.Under rapid cooling condition, the stro
Flow characteristics in the entrance of plate-fin heat exchanger have been investigated by means of particle image velocimetry (PIV). The flow field was measure
An electrochemical method for the direct reduction of solid TiO2 was introduced,in which the oxygen is ionized,dissolved in the molten salt and discharged at th
The aggregating behavior between bubbles and particles induced by high intensity conditioning (HIC) was studied using high speed CCD technique. Bubble size meas
The melting, evaporation and oxidation behaviors as well as the solidification phenomena of tungsten and molybdenum in induction plasma were studied. Scanning e
The microwave magnetic properties of the ball milled FeCo panicles were investigated as func tions of ball milling time ( t ) using microwave electromagnetic pa
Nb-15W-18Si-xHf (x = 0, 5, 10 and 15, mole fraction, %) alloys were prepared by arc melting and then homogenized at1 750 ℃ for 50 h. The microstructure and mec
A finite element analysis was carried out on the development of residual stresses during the cooling process from the fabrication temperature in the SiCp reinfo