Cause analysis and solution measures of water stop

  • Detail

Waterstops are divided into rubber Waterstops, plastic (PVC) Waterstops, steel Waterstops, and rubber plus steel Waterstops. The water stop material has good elasticity, wear resistance, aging resistance and tear resistance, strong adaptability to deformation and good waterproof performance. Temperature range -45 ℃ - +60 ℃. This product shall not be used when the temperature exceeds +70 ℃, and when it is strongly oxidized or eroded by organic solvents such as oils

Waterstops have good physical and chemical properties, excellent waterproof performance, strong elasticity and deformation capacity, and can also resist corrosion, aging and tearing. They are the most commonly used water-proof materials in the waterproof construction of infrastructure, underground facilities, tunnels and other projects. Generally, Waterstops are poured together with the expansion joint concrete. So, what are the key points of waterstop construction that need special attention? Don't worry, next I'll explain the construction of the lower waterstop and related knowledge to my friends

specifications of Waterstops

there are many specifications, such as bridge type, mountain type, P type, R type, U type, Z type, B type, T type, H type, E type, Q type, etc

Waterstops are mainly used in infrastructure projects, underground facilities, tunnels, sewage treatment plants, water conservancy, subway and other projects. It is used for the concrete pouring of expansion joints of gates, dam bottoms, construction works, underground buildings, etc. QZ series is made of rubber. So as to ensure the service life of engineering buildings

waterstop manufacturers recommend

the first: Hengshui Jinhai Engineering Materials Co., Ltd.

the company's principle is “ Customer first, small profits but quick turnover, benefit sharing ”, Adhere to the quality of products first and serve the people wholeheartedly. The Waterstops of the company have been certified by ISO9001:2000 international quality system, so the quality of Waterstops is worth ensuring. Secondly, it has been producing Waterstops for 10 years. It can be said that it is an old manufacturer of Waterstops, and it is relatively expensive to buy at a single price

second: Hengshui Donghong rubber products Co., Ltd.

the company has its own place in the waterstop market with first-class product quality and competitive price. The waterstop of this company is mainly sold online, reducing the intermediate sales links and reducing the price, so as to attract more customers. Therefore, its waterstop can be said to be the cheapest, and there are 10 different models and series for us to choose. There are unexpected surprises if we buy in large quantities! However, the disadvantage is that we can't inspect our strength when we sell online

Third: Hangzhou Dawan Industrial Co., Ltd.

the company is mainly responsible for the production and processing of products, and independent sales. Its waterstop is specially suitable for seaside projects. Secondly, it will not have the problem of incomplete models, and there are a large number of Waterstops. It is suitable for bulk purchase of seaside projects. The only disadvantage is that the company has not passed the international quality system certification

key points of waterstop construction

key point 1: Waterstops should be used and taken at any time during construction. At ordinary times, Waterstops should be protected from long-term exposure to the sun and long-term contact with objects with strong corrosive properties

Waterstops have the properties of aging resistance and corrosion resistance, but in order to maintain the waterproof performance of Waterstops for a long time, appropriate protection is indispensable. Therefore, in order to maintain the service life of the waterstop, it is necessary to prevent the waterstop from being exposed to the sun for a long time and from being exposed to highly corrosive chemicals for a long time

point 2: during the construction process, the waterstop is generally poured with the concrete to prevent the waterstop from being punctured or damaged in the future. Sharp objects such as stones with more sharp corners should be avoided in the concrete

the waterstop has certain tear resistance, but when the waterstop is punctured or torn, it will be easy to be further damaged. Generally, the external force is very small, which will further expand the damaged part of the waterstop, thus affecting the waterproof performance of the waterstop and causing serious impact on the waterproof project

key point 3: during construction, the waterstop must be fixed before pouring with concrete to avoid displacement during pouring

when in use, the waterstop is generally installed in a fixed position. If the position of the waterstop changes during pouring, the waterproof performance of the whole waterproof project will be reduced. Therefore, in order to make the waterproof performance of waterproof engineering reliable, it is necessary to ensure that the waterstop is fixed at the position when it is mixed with concrete and does not displace

waterstop executive standard

gb18173.2-2000 polymer waterproof materials Part 2 Waterstops

gb/t 2059-2008 copper and copper alloy strip

gb 3280-2007 cold rolled stainless steel sheet and strip

gb50108-2001 technical code for waterproofing of underground works

cause analysis and solutions of waterstop fracture during construction suspension

to prevent displacement during concrete pouring, Ensure the correct position of the waterstop in the concrete. Only holes can be punched on the allowable parts of the waterstop, for fixing the waterstop. Do not damage the effective waterproof part of the waterstop

common fixing methods include: fixing with additional reinforcement; Special fixture fixation; Fix with lead wire and formwork, etc. No matter what kind of fixing method is adopted, the fixing method of the waterstop should be carried out according to the construction specifications required by the design, and it is necessary to ensure the accurate positioning of the waterstop, not to damage the effective waterproof part of the waterstop, and to facilitate the concrete pouring and tamping. According to the model, it can be divided into: CB rubber waterstop (embedded type with hole in the middle); CP type rubber waterstop (embedded type, with no hole in the middle); EB type rubber waterstop (externally attached with a hole in the middle); EP type rubber waterstop (externally attached, with no hole in the middle)

according to the material, it can be divided into: natural rubber waterstop, neoprene waterstop, EPDM waterstop

according to the use situation, it can be divided into: middle buried rubber waterstop and back attached rubber waterstop (external attached rubber waterstop), steel edge rubber waterstop, water swelling rubber waterstop, and flat waterstop. Rubber Waterstops are mainly used for foundation works that are set in construction joints and deformation joints when concrete is cast in place, such as underground facilities, tunnel culverts, water conveyance aqueducts, dams, liquid storage structures, etc. The waterstop is partially or completely embedded in the concrete during the concrete pouring process

there are many sharp stones and sharp steel bar heads in the concrete. Because the tear strength of plastic and rubber is 3-5 times lower than the tensile strength, once the waterstop is punctured or torn, the crack will expand without great external force. Therefore, in the process of waterstop positioning and concrete pouring and tamping, attention should be paid to the positioning method and pouring and tamping pressure to prevent the waterstop from being punctured

editor's summary: when you want to buy Waterstops, you should polish your eyes and choose products with qualified quality, otherwise it will have a certain impact on the quality of the project. The above three points are the three points that need to be paid attention to most in the construction process of waterstop. In addition, when installing the waterstop, its size must meet the design requirements, and during the construction process, the concrete interface at the junction with the waterstop should be kept flat, dry and free of debris





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