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所谓预应力混凝土滑动台面,就是在混凝土台面设置纵向预应力钢筋,使混凝土受到预压应力,从而防止台面因混凝土收缩而产生横向裂缝;同时在混凝土与垫层之间设置隔离层,使上层混凝土成为滑动台面,由温差引起的台面胀缩就不会受到垫层的约束。应用补偿收缩混凝土,由于膨胀剂及膨胀水泥产生的微膨胀,可以抵消混凝土的干缩,世
The so-called prestressed concrete sliding table is to set a longitudinal prestressed steel bar in the concrete table, so that the concrete is subjected to pre-compression stress, thereby preventing the tabletop from producing transverse cracks due to shrinkage of the concrete; at the same time, a barrier layer is provided between the concrete and the cushion to make the upper layer concrete As a sliding table, the table expansion and contraction caused by the temperature difference will not be constrained by the mat. The use of shrinkage-reducing concrete can offset the shrinkage of the concrete due to the slight expansion caused by the expansion agent and the expansion cement.