清水墙面一般多勾凹缝,深度以3～5毫米较好。为了保证勾缝质量,砌筑时应将灰缝缩入墙内10～12毫米。过去主要采用两种方法;第一种方法是砌缩口灰。砌筑时砂浆不铺到边,预留出勾缝深度。由于一般在预留时宽度不容易掌握准确,所以往往留口上宽窄不匀。留得过宽,将增加勾缝用灰量,既浪费水泥又影响效率;留得偏窄,在勾缝时不得不开凿,既影 Clear water wall generally more concave seam, the depth of 3 to 5 mm better. In order to ensure the quality of the joints, the mortar joints shall be shrunk into the walls by 10 to 12 mm. In the past, there were mainly two methods used; the first method was to shrink the mouth ash. When the masonry mortar is not spread to the side, set the depth of jointing. Since the width is generally not easy to grasp accurately when it is set aside, it tends to be wide and narrow. Staying too wide will increase the amount of gusset used, which will both waste cement and affect efficiency; it will remain narrow and it must be cut during the jointing process.