Analysis of 10 Common Quality Issues in Masonry Work and Their Prevention Measures

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Analysis of 10 Common Quality Issues in Masonry Work and Corresponding Prevention Measures. This article summarizes 10 common quality issues based on examples from masonry projects, analyzes the causes of these problems, and proposes improvement measures for reference by professionals in this field. In Q1, the plain concrete for the bathroom was not roughened or cleaned and wetted with water before pouring, and a vibrator was not used to compact it during the pouring process. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/be87b059058fae7bb908b61133ad9e14.jpg Prevention and control measures: 1. Report to the supervisor for inspection; seal the formwork once it is approved ； 2. Use a small vibrator to compact the mixture during pouring. The cutting dimensions of the pull bars in Section Q2 were not calculated accurately, resulting in an insufficient length extending into the wall ； The length of the embedded rebar does not meet the design specifications and fails to satisfy the pull-out resistance requirements. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/ff7a7a739a0ed1d72761220e7eed2b08.jpg Prevention and control measures: 1. Determine the type of tie bars for different wall sections based on the length of the wall ； 2. Install a scale on the drill bit to ensure the drilling depth. In Q3, the positions of the rebar inserted into some wall studs were offset, and the ends of some tie bars extending into the filler walls did not have 180-degree hooks. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/821cfa42c0ac1350873e3cfd23b713a8.jpg Prevention and control measures: 1. Standardize the type of rebar used ； 2. Determine the position for embedding steel bars based on the dimensions of the door jambs. In Q4, when using grade 1 rebar for the binding of wall studs, 135-degree hooks were not created as required; similarly, 135-degree hooks were not made at the ends of some of the tie bars that extended into the wall studs. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/23cb675a73ce1ef6125fecf7d251e603.jpg Prevention and control measures: Standardize the types of rebar as well as the shape of their bends. In Q5 wall construction, the bricks are laid in an offset pattern up and down; the control of the mortar joints is generally poor and inconsistent, with tight, crowded joints appearing in the vertical seams. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/04db82311c997e5a3f6db2e5289d13ea.jpg Prevention and control measures: 1. Strengthen the geometric dimensions of brick masonry ； 2. Improve the skill level of bricklayers and clarify the masonry methods. Q6: The lintels at the intersections of adjacent door openings are prefabricated, and their overhang length does not meet the design requirements. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/ac9b66dab6b336a5b14ced9b13495f6e.jpg Prevention and control measures: Use cast-in-place lintels in similar areas. At the flared end of the Q7 structural column, the concrete was not poured in one go and is not compact, resulting in serious quality defects. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/64f55a9190ab7b58bdb338192ebd4697.jpg Control measures: Change the method of manufacturing the trumpet-shaped formwork, and use small vibration rods to compact it. At the Q8 section, the length of the rebar embedded in some wall sections extends beyond the wall without proper calculation ； During the pouring of secondary components, debris is used for sealing. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/4b8101b32503d5df0f0320aefb85326b.jpg Prevention and control measures: 1. Adjust the length of the tie bars ； 2. Strengthen the quality education of workers and impose necessary economic penalties. The geometric dimensions of Q9 solid facing bricks are highly irregular. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/f1d496d8a9b1cf6cfd59ca26ca283735.jpg Control measures: 1. If the external dimensions exceed the specified limits significantly, such items should be removed from the site ； 2. Change the supplier. The areas of the Q10 brick-lined walls have suffered severe efflorescence. http://img.civilcn.com/d/file/zhishi/gcgl/2020-05-15/c549bb35658700f70fbc507ce34c7fd7.jpg Prevention and control measures: 1. Select bricks anew and use them in the construction once they meet the required standards ； 2. Treat it using methods such as washing and polishing.