Rehabilitation of Deteriorated Bridge Deck Slab by Adhesion of Precast Panels

采用环氧树脂在钢筋混凝土板甲板上粘贴薄预制板修复老化桥面板的方法进行了试验研究。制作梁型和板型模型试件并加载至极限破坏状态，验证了该方法的实用性。主要结论如下：1)采用在混凝土板表面粘贴两层板的方法修复桥面是一种非常有效的方法。原因是胶合层不仅起到了物理强化的作用，而且起到了防水涂层的作用。桥面疲劳寿命的延长主要受后者的影响。2)采用这种修复方法的试件在静荷载作用下的强度和延性均有较大提高。与同尺寸普通钢筋混凝土试件相比，其变形能力显著提高。3)在局部粘接试验中，当各板粘接面积小于25%时，静强度下降。然而，当它超过50%时，它似乎不受影响。4)当温度高于60℃时，胶合表面的水分含量对胶合表面的变形性能影响较大。在涂胶操作过程中，表面必须尽可能保持干燥。

Experimental studies were made on the rehabiltation method of deteriorated bridge deck slab where thin precast panels were glued on the reinforced concrete slab deck with epoxy resin.Beam and slab type model specimens were made and loaded to the ultimate collapse and the utility of this developed method was examined. Principal conclusions derived are as follows ;1) The method, which consists of two sheets of slate plates glued on the surface of concrete slab, is cocluded to be very effective in rehabilitation of bridge deck. The reason is that the glued layrs play the roll of not only physical strengthening but also water proof coating. Fatigue life of bridge deck becomes longer largely by the effect from the latter.2) Specimens with this rehabilitaion method largely increased their strength and ductility under static loading. The increase of deformation capacity was remarkable in comparison with the ordinary reinforced concrete specimen of the same dimension.3) In the tests of partial bonding, static strength decreased when the glued area in each plate became less than 25%. However, it did not seem to be affected when it was over 50%.4) The strength reduction by high temperature was observed when the temperature was higher than 60 C.5) Moisture content of the glued surface affected largely on the deformation property. The surface must be kept as dry as possible in the course of gluing operation.