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Guangxi Building Red Board Manufacturers Briefly Discuss Why Building Red Boards Deform.

Release time:

2020-05-19 17:15

Source:

http://www.gxbml.com

　　Anything used for a long time will inevitably develop some issues, more or less. For example, red boards used in construction may deform over time. But what causes this deformation? The primary reason for deformation in construction formwork is that during the assembly of small steel forms, the work wasn't carried out according to the required specifications, leading to overall instability and subsequent deformation of the formwork. Additionally, if the initial waterproofing system was not properly installed, or if the foundation settles or tilts laterally, or if the foundation on which the formwork is placed is unstable, all these factors can also cause the construction formwork to deform.

　　During construction operations, in order to meet the schedule, the concrete for walls and columns was poured too quickly without allowing sufficient time for it to fully set. Additionally, the height of each pour was excessively high, and over-vibration at an excessive speed can all lead to deformation of the formwork. Here, the editor from Guangxi Construction Red Board will explain the specific reasons:

　　Deformation of the formwork support system for construction

　　Currently, the formwork support systems commonly used on construction sites generally rely on traditional wooden or round steel pipe supports. Such supports are not only cumbersome and time-consuming, but also generate significant waste. More importantly, they often lead to formwork slippage and bulging at wall corners (both internal and external) as well as around openings. Moreover, if adequate attention is not paid, the finished products may even become deformed.

　　So, once deformation occurs, how should we handle it?

　　The following are some methods for addressing deformation in building formwork support systems:

　　1. When designing formwork and supporting systems for construction, the primary consideration must be to fully account for the self-weight of the product itself, construction loads, the self-weight of the concrete, and the lateral pressure generated during concrete placement and vibration, thereby ensuring that the formwork support system has sufficient load-bearing capacity and stability.

　　2. When using wooden formwork or plywood formwork for construction, promptly pour concrete after passing inspection and acceptance to prevent the wooden formwork from deforming due to prolonged exposure to sunlight or rain.

　　3. The spacing of supports under the beam should be sufficient to ensure that no deformation occurs under the combined effects of the concrete weight and construction loads. If the base of the supports rests on a soil foundation, the soil should first be thoroughly compacted, drainage ditches should be provided, and continuous wooden pads or structural steel sections should be laid down to prevent settlement of the supports.

　　4. The upper part of beam and wall formwork must be equipped with temporary support blocks to ensure the width of the beam and wall openings during concrete pouring.

　　5. When pouring and compacting concrete, ensure even and symmetrical placement of concrete material. Strictly control the pouring height, especially on both sides of formwork around door and window openings. It is essential to ensure thorough compaction of the concrete while also preventing over-vibration that could cause deformation of the formwork.

　　6. For cast-in-place reinforced concrete beams and slabs with a span of 4 meters or more, the formwork shall be cambered according to design requirements. When the design does not specify particular requirements, the camber height should ideally be between 1/1000 and 3/1000 of the span.

　　7. When assembling combined small steel formwork, connecting components shall be placed according to regulations, and the spacing and specifications of surrounding struts and tie-back bolts shall be set in accordance with design requirements.

　　8. When using clamps for beam and column formwork, the spacing between clamps must be specified and the formwork must be securely clamped; the clamp width should be slightly smaller than the cross-sectional dimensions.

　　However, even if a deformed product recovers well after being reshaped, it still doesn't perform as well as one that remains undeformed and unprocessed. The new building formwork support system produced by Guangxi Baimulin Wood Industry Co., Ltd. effectively eliminates this issue altogether. Made from cold-rolled steel, the system features a square steel structure that increases the load-bearing surface area, making the product less prone to deformation and completely preventing the occurrence of bursting and mold expansion.

　　Analysis of Deformation in Construction Formwork

　　Reason: 1. The assembled small steel formwork was not installed according to regulations, resulting in poor overall structural performance.

　　2. The foundation on which the formwork was placed is unstable, no leveling plates were used, and inadequate waterproofing measures have led to foundation settlement.

　　3. When wooden formwork or plywood is used for construction, and after passing inspection but before concrete is poured in a timely manner, prolonged exposure to sunlight and rain can cause the formwork to warp and deform.

　　4. The support spacing is too large, resulting in poor rigidity of the steel plate.

　　5. The concrete for walls and columns was poured too quickly, with excessive pouring height in a single lift and over-vibration.

　　The above is the analysis provided by the editor of Guangxi Construction Red Boards on the reasons behind the deformation of construction red boards. We hope this information has been helpful to you. The next article will focus on solutions for the deformation of construction red boards. If you’re experiencing such issues and would like to learn about effective remedies, be sure to check out the next article.

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Company Name:Guangxi Baixiang Wood Industry Co., Ltd.
Company address:Xiamu Village, Shicun Township, Xiangzhou County, Laibin City, Guangxi Zhuang Autonomous Region

Service Hotline:Mr. Zheng, 15260000589Mr. Yan, 15259699969

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