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一、振压混凝土的工艺原理振压混凝土是通过调整骨料粒度使混凝土中骨料容积率尽可能地大,并借助强制振动和压缩的作用,使混凝土密实成型。振压混凝土的骨料表面形成一层均匀的粘结力大的水泥浆。这是由于混凝土的水灰比小于37%(见下表),用强制振动使超干硬性混凝土密实,骨料间隙达到最小,水泥浆包在骨料表面的缘故。在振动作用下骨料颗粒相互靠近,骨料表面水泥浆呈流动状态,从而混凝土处于流动状态。继续振动,流动状态的混凝土发生重力沉降,而混凝土中所含的空气上逸,为了不妨碍空气的逸出,必须定时地投料。振压法效率高,模型周转快。以矩形涵洞为例,与传统生产方法相比,可节约水泥30%,过去6人1天生产18件,而振压法1～2人1天能生产18～24件。振压法可以制造各种形状的制品。图1是 VIHY 振压制管机。
First, the principle of vibration concrete technology Vibratory compression concrete is to adjust the size of the aggregate to make concrete aggregate volume ratio as much as possible, and with the help of forced vibration and compression, so that the concrete compact molding. Vibrating concrete aggregates form a uniform layer of cement slurry with high cohesion. This is due to the fact that the water-cement ratio of the concrete is less than 37% (see the table below). The ultra-dry hard concrete is densified by forced vibration, and the aggregate gap is minimized. The slurry is wrapped around the surface of the aggregate. Under the effect of vibration, the aggregate particles are close to each other, and the cement slurry on the surface of the aggregate flows, so that the concrete is in a flowing state. As the vibration continues, gravitational settling occurs in the flowing concrete, and the air contained in the concrete escapes. In order not to obstruct the escape of air, the material must be fed regularly. The vibration pressure method is efficient and the model turnover is fast. Taking a rectangular culvert as an example, compared with the traditional production method, cement can be saved by 30%. In the past, 6 people produced 18 pieces in one day, while 1 to 2 people in the vibration method can produce 18 to 24 pieces in one day. Vibratory pressure can produce various shapes of products. Figure 1 shows the VIHY vibratory tube press.