冻融作用下土石混合体-混凝土界面强度劣化、孔隙结构演化及颗粒运移研究

唐丽云, 李屹恒, 于永堂, 金龙, 高志刚, 贾海梁, 孙强, 刘晨昕

Study on strength deterioration， pore structure evolution and particle migration of interface between soil-rock mixture and concrete under freeze-thaw action

Liyun TANG, Yiheng LI, Yongtang YU, Long JIN, Zhigang GAO, Hailiang JIA, Qiang SUN, Chenxin LIU

表7 界面层在不同冻融次数及含石率下的孔隙分形维数

Table 7 Fractal dimension of pore under different numbers of freeze-thaw cycles and stone content of interface layer

含石率 冻融次数 T2a/ms T2b/ms T2≤T2a T2a<T2<T2b T2≥T2b D R2 D R2 D R2 15% 0 5.336 43.287 2.254 0.886 2.259 0.941 2.271 0.987 3 5.057 36.543 2.260 0.954 2.261 0.947 2.283 0.989 5 10.496 45.638 2.258 0.952 2.258 0.956 2.280 0.973 20 8.691 34.693 2.246 0.851 2.158 0.935 2.265 0.965 25% 0 7.054 75.646 2.267 0.903 2.269 0.962 2.293 0.989 3 7.483 43.549 2.271 0.925 2.278 0.966 2.299 0.987 5 10.369 50.863 2.269 0.937 2.271 0.970 2.295 0.854 20 11.690 42.681 2.261 0.887 2.151 0.934 2.285 0.973 35% 0 8.595 50.332 2.279 0.913 2.291 0.968 2.312 0.984 3 7.968 132.698 2.284 0.920 2.298 0.969 2.328 0.943 5 14.881 55.840 2.280 0.956 2.295 0.971 2.325 0.931 20 12.571 100.155 2.255 0.865 2.281 0.950 2.318 0.945 45% 0 4.641 57.223 2.291 0.926 2.304 0.964 2.342 0.931 3 10.634 40.393 2.297 0.949 2.310 0.969 2.349 0.945 5 8.814 110.589 2.294 0.898 2.306 0.975 2.343 0.964 20 23.168 77.961 2.283 0.874 2.201 0.940 2.325 0.954 55% 0 8.111 98.687 2.313 0.952 2.315 0.915 2.364 0.934 3 9.957 49.385 2.319 0.948 2.319 0.955 2.372 0.945 5 18.841 136.589 2.315 0.936 2.305 0.961 2.369 0.942 20 24.692 130.008 2.298 0.886 2.292 0.951 2.351 0.953 65% 0 6.136 75.646 2.324 0.962 2.356 0.945 2.381 0.935 3 8.693 48.693 2.329 0.952 2.364 0.951 2.396 0.951 5 16.276 59.936 2.325 0.959 2.359 0.931 2.389 0.956 20 38.692 84.365 2.305 0.902 2.331 0.954 2.362 0.946