我厂在新建工程中,把混凝土拌和机楼、净水机房、配电间和厕所等屋面改用双层正反双T型刚性自防水屋面板,建成一年来均无渗漏现象,现介绍如下。这种板的截面形状及尺寸见图1。板身采用300或400号细石混凝土浇制,浇后一天板面刷水 In the new construction of our factory, the concrete mixing plant, water purification machine room, power distribution room and toilets and other roofs were changed to double-layer positive and negative double T rigid self-waterproof roofing panels. No leakage occurred in the past year. as follows. The cross-sectional shape and dimensions of this plate are shown in Figure 1. The plate body is casted with 300 or 400 fine stone concrete, one day after pouring the water