混凝土的二次振捣,其实是指在混凝土浇筑后的适当时间,重新对混凝土进行振捣。其实在工程施工中,也都间接或直接的进行过混凝土二次振捣。混凝土的二次振捣有很多优点,不仅可以提高混凝土的强度,或在保证强度的前提下节约水泥的用量,而且可以增加混凝土的密实度,提高防渗性,消除混凝土由于沉陷产生的裂纹和细缝。将探讨混凝土二次振捣的施工方法以及相关的机理。 Secondary vibration of concrete, in fact, refers to the concrete pouring at an appropriate time, to re-vibrate the concrete. In fact, in the construction, are also directly or indirectly conducted secondary concrete vibrator. Secondary vibrating concrete has many advantages, not only can increase the strength of concrete, or to ensure the strength of the premise of saving the amount of cement, but also can increase the density of concrete, improve impermeability, eliminate concrete cracks due to subsidence and Slit. Will discuss the construction method of secondary vibrating concrete and related mechanism.