外墙抹灰裂缝的控制的好办法（A good way to control cracks in exterior plastering）.doc

外墙抹灰裂缝的控制的好办法（A good way to control cracks in exterior plastering） A good way to control cracks in exterior plastering This post was moved from the industrial and civil buildings by black magic carp to this area (2007-04-21) In order to effectively prevent and control cracks, through the analysis of various types of cracks and the causes, targeted prevention and treatment, will achieve good results. To this end, in addition to the strict implementation of national and local standards in the design and construction, we should also take practical measures according to the characteristics of the cracks. The main measures can be considered from two aspects: first, active prevention, and two initiative. The so-called protection, which will be part of the deformation and additional stress release or reduce the wall produced by certain measures; and resistance, is through the design and construction measures to resist because of additional stress caused by the deformation of the wall. Only these two aspects of comprehensive consideration, can achieve better results. I. prevention and control measures during construction 1. exterior wall structure (1) block all the holes in the wall. Matrix holes and uneven place, first with 1:3 cement mortar leveling, such as leveling layer is too thick (greater than 10mm), should be layered and leveling. (2) block good foot, hand eye. There are data analysis, exterior wall cracks, feet, hand hole at the original hole shape split, such cracks accounted for about 45% - 65%. The specific control measures are: blocking eye should be 2h in the wall before plastering should be filled with water soaked cotton silk hole in 30min after removal of cotton yarn, the bottom of the hole covered with mortar, then block masonry water soaked into the hole, both sides are using vertical seam pointing trowel filled with mortar, until is dense check. 2. ensure the construction quality of brick masonry and leveling layer (1) the outer wall of the joint betwee