The hottest reason for water seepage of dimmer gla

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From the detection of the causes of water seepage of dimming glass in the process of use

with the sustained and rapid growth of the national economy, the domestic building materials market has developed rapidly. Due to the cost reduction, intelligent dimming glass has gradually been accepted by the construction and design industry and began to be applied on a large scale, and dimming glass has also begun to enter the application field of home decoration. Some users will encounter water seepage when using dimmer glass. Let's take Zhonghua glass to analyze the causes of water seepage from the detection of glass to the user's use

inspection of dimming glass

(1) the intensity of dimming glass was not checked, and the dimming glass did not have enough bearing capacity, which cracked and broken under typhoon and rainstorm, resulting in water inflow

(2) there is no thermal stress check calculation for the dimming glass. A large area of dimming glass absorbs sunlight, and the thermal stress exceeds its allowable stress, causing thermal fracture and curtain wall water leakage

at this time, the tension will fall with it

(3) the dimensional tolerance of the dimming glass exceeds the standard, and the two force embedding amount and gap of the dimming glass do not meet the design requirements, when it is installed on the exposed frame dimming glass curtain wall; If the dimming glass is too small, the depth of the notch is insufficient, the width of the glue joint cannot meet the requirements, and the dimming glass is easy to break from the edge; If the dimming glass is too large, the notch is embedded too deep, and the dimming glass is easily extruded by aluminum profiles due to thermal expansion, resulting in water seepage. When the dimming glass with inaccurate size is installed on the hidden frame dimming glass curtain wall, the glue joint width is uneven, which makes it difficult to control the glue injection quality. The specification stipulates that the joint width of the dimming glass of the hidden frame dimming glass curtain wall should not be less than 15mm, so as to ensure that the joint gap meets the requirements of the interlayer displacement of the curtain wall due to earthquake and temperature changes, and will not crush the dimming glass

(4) the dimming glass is not chamfered at the edge. When used as curtain wall surface material, the dimming glass is easy to produce stress concentration, resulting in dark crack or self explosion, which has hidden dangers

dimmer glass construction

(1) when installing the aluminum frame, it does not operate according to the specifications, does not pay attention to the quality, and the levelness, perpendicularity, diagonal difference and straightness exceed the standard. If it directly affects the physical performance of the curtain wall, it will be cleared). Generally speaking, the water flow at the joint is far greater than the average water flow on the dimming glass wall. The joint is the main leakage part. If the joint of each component is not sealed, water will inevitably leak after installing the dimming glass

(2) the construction of weather resistant silicone sealant is not dense, the sealing is not tight, or the length width ratio does not meet the specification. The specification stipulates that the construction thickness should be greater than 3.5mm and less than 4.5mm, the height should not be less than twice the thickness, and three sides should not be bonded. The weatherproof silicon should be replaced in time. If the construction thickness is too thin, the sealing quality cannot be guaranteed, which is unfavorable to the tensile stress caused by the temperature change of the profile; If it is too thick, it is easy to be broken, making the sealing and anti leakage ineffective, and rainwater seeps into the room from the filled gaps and cracks

(3) pay no attention to the construction conditions of sealant. There is a lot of rain in the south. If the weatherproof sealant is forcibly constructed in the open air in the rainy season, the sealing quality cannot be guaranteed. Structural adhesive construction also has certain temperature and humidity conditions, which must be paid attention to

(4) the size of the sealant strip is inconsistent or inferior materials are used, which will soon loosen or age and lose the sealing and waterproof function

to absorb 1 carbon oxide and other toxic gases (5) there is no elastic positioning cushion block, and the dimming glass is in direct contact with the component. When the building is deformed or the temperature changes, the components will produce greater stress on the dimming glass, and the dimming glass will often crack from the bottom of the dimming glass

use of dimmer glass

(1) the user did not provide detailed completion data and instructions to the user. After the user moved in, he did not understand the use method of the curtain wall, resulting in damage, collision deformation, pollution, etc. to the curtain wall, resulting in water seepage

(2) when cleaning the outer wall, improper operation is easy to cause damage to the curtain wall. For example, the hanging basket hanging rope of the cleaning company is often directly hung on the glue joint on the top of the curtain wall, rubbing back and forth to crack the glue joint, causing water seepage. If neutral detergent is not used for dimmer glass cleaner, or it is not washed with clean water after cleaning, corrosion will occur and the sealing performance will be damaged

(3) residents carried out reconstruction without authorization, and the damaged parts were not carefully filled and waterproof

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