Slices from the top, bottom, sides and bulk of each specimen were examined by methanol exchange, quantitative determination of coarse and fine aggregate and backscattered electron imaging in the SEM.

• 分别从每个样条的顶部、底部、侧面和本体取样，通过甲醇交换，粗细集料的定量测定和在SEM中的背散射电子成像对试样进行检测。