为了求得建筑物外形美观,对伸缩缝的封堵材料已由沥青麻丝转为采用镀锌马口铁加以覆盖。按以往的常规作法是,在伸缩缝两侧的墙体上每隔500mm镶入浸入沥青油的木砖(见图1)。这样做一是浪费材料;二是抹在镀锌铁皮上的压边砂浆容易脱落;三是当伸缩缝为两面砼墙或构造柱之间 In order to obtain a beautiful appearance of the building, the plugging material for the expansion joint has been changed from bitumen to galvanized tinplate. According to the conventional practice, the bricks impregnated with bitumen oil are embedded in every 500 mm of the wall on both sides of the expansion joint (see Figure 1). One way to do this is to waste material; second, the squeezing of the screed on the galvanized iron is easy to fall off; the third is when the expansion joint is between two stumbling walls or structural columns.