The tongue and groove method of closing the window opening is 2q11
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Oily release agent should be used when the template is used for the first time, and then water-based release agent should be used
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Response: when deepening the formwork, attention should be paid to the non-standard parts such as beam column, beam wall joint and the lower part of the internal corner of the wallboard
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Response: consider in advance when deepening
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1
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Q12 is not combined with the structure size and plastering thickness to deepen the masonry specification in advance, which leads to plastering closing in later period
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In addition, the weld, the width of the butt joint and the bolt should also be accepted
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The insufficient strength of aluminum template leads to serious deformation
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The formwork must be cleaned immediately after the removal of the aluminum formwork
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Practice Q10 does not deepen the closing tongue and groove of the window hole, so the plastering closing is still needed after the installation of the outer window
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This paper summarizes the 12 problems in the construction of aluminum formwork to see how to deal with them? The strength of Q1 aluminum mold can not meet the requirements, and it is easy to deform in the construction process
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Floor cracking and leakage during concrete pouring at the root of wall column in Q7 standard for formwork removal, which leads to root rot after forming
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Response: the width and depth of tongue and groove should be deepened according to the requirements of two prevention
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As a new construction technology, there are some problems in the current field application
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The K-plate is fixed on the structure independently, and it is forbidden to disturb the upper K-plate when removing the lower wall panel
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Source: Luban union of construction engineering.
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The masonry specifications are not deepened
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Response: set external wall K board, stair K board, caisson K board
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After formwork removal, cement slurry Q5 is removed, and staggered platforms appear in the upper and lower wall columns, stairs, caissons and other parts
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During construction, the vertical formwork shall be removed after 12 hours, and the beam and slab bottom formwork shall be removed after 48 hours, but the support system shall not be removed
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The width and depth of Q9 plasterless tongue and groove can not meet the requirements of specification and two prevention
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Response: after the completion of concrete pouring, the wall column root within 20cm shall be leveled with a leveling instrument to facilitate the fixation of R plate or closing formwork, and the existing gap shall be sealed with mortar before pouring
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Due to leakage of cement slurry, honeycomb and pitted surface cement slurry is not cleaned up, resulting in loose joint
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There are a lot of small plates in Q2 aluminum template system of Vickers hardness tester
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During the pouring, after the slurry leakage forming, the rigidity of the Q8 wall top formwork is insufficient, and the deformation of the wall top is too large, which leads to the poor verticality of the wall
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Response: 6061-T6 or T12 series aluminum materials should be used, and the strength acceptance of aluminum mold profiles should be strengthened before the aluminum mold enters the site
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Response: masonry specifications should be deepened in advance, and procurement and production should be carried out
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The K-plate fixing measures of upper and lower wall staggering are well formed
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Response: in the process of deepening, we should consider the closing of window opening in advance, and leave the tongue and groove of window opening
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After the Q4 aluminum formwork was removed, the slurry leakage at the joint seriously led to honeycomb and pockmarked surface, which seriously affected the appearance
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Small plates are used to splice the vertical wall formwork at the lower part of the internal corner of the wallboard, and the Q3 aluminum formwork can reach the top at one time
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Response: aluminum mold must be coated with release agent before each use
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Picture Q6 cracks and leaks at the joint of beam and plate
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The width and depth of the tongue and groove are not enough, and there is no tongue and groove on the side of the lintel to avoid plastering
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Aluminum formwork is a new type of formwork system in recent years, which is green, low energy consumption, economic and practical, short construction period, good effect, and gradually used in the construction of high-rise buildings
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Response: the cement slurry at the edge of the formwork is not cleaned up and the joint is not tight, which leads to slurry leakage
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After the formwork is removed, the concrete surface appears peeling
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Response: premature formwork removal and loading lead to floor cracking
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Response: when deepening, add a pair of pull screw at the top of the wall, if the deformation is still not controlled, add a back ridge
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It is recommended to coat the template
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Cause: the oily release agent pollutes the steel bar and affects the later decoration
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The embedded skirting line tongue and groove is not deepened in the hardbound building delivery section
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It is impossible to close the window opening without retaining the tongue and groove
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