| 1. | In the view of the concrete ' s micro construction , it can conclude that the boundary is the weakest . minute crack occurs firstly at the boundary , and then it spread toward the cements , which are produced by thermal stress
该模型是从混凝土组成的微细观角度出发，简化为水泥砂浆包围骨料的平面问题，微裂纹首先在界面上产生然后向水泥砂浆中延伸。 |
