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The water stop belt has good physical and chemical properties. It has excellent water resistance, high elasticity and deformation ability, and the water stop belt is also resistant to corrosion, aging and tearing. It is in infrastructure, underground facilities, and tunnels. The most commonly used waterproof material in waterproof construction of such projects, under normal circumstances, the water stop is used together with the expansion joint concrete pouring. So, what are the main points of waterstop construction that require special attention? Don't worry, let me explain the construction of waterstops and related knowledge for my friends.
Water stop specifications
There are bridge type, mountain type, P type, R type, U type, Z type, B type, T type, H type, E type, Q type and so on.
Water stop use
Mainly used in infrastructure projects, underground facilities, tunnels, sewage treatment plants, water conservancy, subway and other projects. It is used for concrete pouring of expansion joints for gates, dam bottoms, construction works, and underground buildings. QZ series rubber. In order to ensure the service life of the engineering building.
Waterstop manufacturers recommended
First: Hengshui Jinhai Engineering Materials Co., Ltd.
The company's principle is "customer first, small profits but quick turnover, benefit sharing", insist on product quality first and wholeheartedly serve the people. The company’s waterstops are all certified to ISO9001:2000 international quality system, so the quality of the waterstop is worth protecting. The second is that it has a 10-year history of production of waterstops. It can be said to be a waterstop. Old manufacturers are more expensive when they buy a single price.
Second home: Hengshui Donghong Rubber Products Co., Ltd.
The company has its own place in the market of waterstops with first-class product quality and competitive prices. The company’s waterstops are mainly sold online, reducing intermediate sales links, lowering prices and attracting more customers, so its water stop can be said to be the cheapest, and there are a total of 10 different The model series for us to choose, if you buy in large quantities, there are unexpected surprises! However, the disadvantage is that it means selling on the Internet. We can't examine the strength.
The third: Hangzhou Dawan Industrial Co., Ltd.
The company is mainly responsible for the production and processing of products, and sells its own products. Its waterstops are specially designed for use on seaside projects. Secondly, it will not suffer from incomplete models, and the number of them will be suitable for large-scale purchases of seaside projects. The only downside is that the company has not passed the international quality system certification.
Water stop construction points
Point one: When the water stop belt is in construction, it should be used with it. Usually, it is necessary to avoid the prolonged exposure of the water stop, long-term contact with articles with strong corrosion properties.
The water stop belt has the properties of aging resistance and corrosion resistance, but proper protection is indispensable in order to maintain the waterproof performance of the water stop belt for a long period of time. Therefore, in order to maintain the service life of the water stop, avoid the long exposure of the water stop and prolonged exposure to highly corrosive chemicals.
Point 2: In the construction process, the water stop belts are generally cast together with concrete. In the future, the water stop belts are prevented from being punctured or damaged, and sharp objects such as stones with sharp corners should be avoided in the concrete.
The water stop has a certain tear resistance, but when the water stop belt is punctured or torn, it can be easily damaged. Under normal circumstances, the external force is very small, and the breakage of the water stop can be caused. Further expansion will further reduce the waterproof performance of the water stop, which will have a serious impact on the waterproofing project.
Point 3: During the construction process, the water stop belt must be fixed before pouring it into place with the concrete to avoid displacement during pouring.
When the water stop belt is used, it is generally installed in a fixed position. If the position of the water stop belt changes during pouring, the waterproof performance of the entire waterproofing project will be reduced. Therefore, in order to ensure the waterproof performance of the waterproofing project, it is necessary to ensure that the water stop zone is fixed in position when mixed with the concrete, and no displacement occurs.
Waterstop implementation standard
GB18173.2-2000 "Polymer waterproof material part 2 water stop tape"
GB/T 2059-2008 Copper and Copper Alloy Strips
GB 3280-2007 "Stainless steel cold-rolled steel plate and strip"
GB50108-2001 "Waterproof Technical Specifications for Underground Works"
Analysis of Causes to Breakdown of Water Belt in Engineering Construction and Solutions
Prevent displacement when pouring concrete and ensure the correct position of the water stop in the concrete. Only pierce holes in the permissible area of ​​the water stop, for fixed water stop. Do not damage the effective water-proof area of ​​the water stop.
The commonly used fixing methods are: use of additional steel bars for fixing; special fixtures for fixing; fixing with lead wire and template; No matter what kind of fixing method is adopted, the method of fixing the water stop should be carried out according to the design requirements of the construction specification and it must be ensured that the positioning of the water stop tape is accurate, and the effective water-proof position of the water stop tape is not damaged, so that the concrete can be poured easily. According to the model can be divided into: CB type rubber water stop (embedded middle hole type); CP type rubber water stop (embedded middle non-hole type); EB type rubber water stop (outside the middle of the paste type Hole type); EP-type rubber water stop (outside the middle of the paste type).
According to the material can be divided into: natural rubber water stop, neoprene water stop, EPDM rubber water stop.
According to the use conditions, it can be divided into: buried rubber waterstop and back-mount rubber waterstop (outer-sealed rubber waterstop), steel-edge rubber waterstop, water-expanded rubber waterstop, flat plate Hose. Rubber waterstops are mainly used for foundation projects where concrete is placed in construction joints and deformation joints when concrete is cast in place, such as underground facilities, tunnel culverts, water conveyance aqueducts, dams, and reservoir structures. Waterstops are partially or totally buried in concrete during the concrete pouring process.
There are many sharp stones and sharp steel heads in concrete. Since the tear strength of plastic and rubber is 3-5 times lower than the tensile strength, when the water stop tape is punctured or torn, it does not require much external force. Cracks will expand, so in the positioning of the water stop and concrete pouring process, attention should be paid to the positioning method and the pouring pressure so as not to stop the water belt from being punctured.
Editor's summary: Everybody wants to buy waterstops when they have to polish their eyes. To choose a product that passes quality clearance, it will have a certain impact on the quality of the project. The above three points are the three most important points to note in the construction of waterstops. In addition, when the water stop is installed, it must be ensured that its size meets the design requirements. In the construction process, the concrete interface at the junction with the water stop zone should be kept flat, dry and free of debris.
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