新老混凝土界面处理技巧与工程应用(国外英文资料).docVIP

新老混凝土界面处理技术与工程应用(国外英文资料) It reduces the surface contact between the gel and the bone. Therefore, the interface forms a loose network structure, the original crack increase becomes large, the interface bond strength decreases, the interface effect is weakened. Therefore, it is the main measure of the interface effect to reduce the water gray ratio, reduce the water membrane layer and improve the character of the transition zone. Old and new concrete interface is also similar to the concrete aggregate and cement in contact with such a transition zone, and this is precisely the weakest of the three interface layer. New and old concrete combination surface treatment method Influence factors of old and new concrete surface bonding performance is more, but with the new and old concrete surface method to master the following principles: reasonable and effective surface treatment; Choose the binder according to the actual situation; Strictly control the construction time of new concrete; Timely maintenance measures. The surface treatment of the old concrete is the first and crucial step in the concrete repair, and the roughness of the surface treatment is the main factor affecting the bonding. Surface treatment is to point to remove all the old concrete surface damage, loose and adhesion of aggregate, mortar and impurity of sundry, and make the solid part of the aggregate surface, constitutes a rough surface in order to improve the cohesiveness. Surface treatment method: artificial beating method; Shotblast (sand) method; Water injection method of water pressure; Brush and brush the net. On this research, foreign scholars to do the work, including the Japanese adachi ichiro is old concrete surface treatment on the influence of the new and old concrete bonding done more comprehensive research. High pressure water injection is the best way to get a clean, ideal combination. The method has many advantages: the work is done quickly and efficiently, without vibration, noise and