Hubei Huangshi waterproof board type

Waterproof board is an anti-seepage material made of polymer as the basic raw material, which can prevent liquid leakage and gas volatilization. It is widely used in construction, transportation, subway, tunnel and engineering construction. Waterproof board is also called geomembrane. It is customary to call =. Thick geomembrane is called waterproof board. It is called geomembrane. It is an anti-seepage material made of polymer as the basic raw material. It is divided into homogeneous waterproof board and composite waterproof board. plate.
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The main function of waterproofing board is to prevent the leakage of liquid and the volatilization of gas. The role of waterproofing board in rock engineering is mainly to prevent seepage and isolation, but it also plays a role in strengthening and protection. effect. It is mainly used in: anti-seepage subway, basement and tunnel anti-seepage lining highway and railway foundations in earth-rock dams, rockfill dams, masonry dams, concrete dams, tailings dams, sewage reservoir dams, channels, liquid reservoirs and other projects. It is used with geotechnical materials such as filament geotextiles and bentonite waterproof blankets in sanitary landfills.
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Waterproof board The D waterproof board (new D waterproof board) used for underground anti-corrosion and anti-seepage projects is based on the ordinary waterproof board and has been formulated and restructured to use high-quality low-pressure and high-density materials. Polyethylene raw materials are scientifically mixed with carbon black, anti-aging agents, antioxidants, ultraviolet absorbers, stabilizers and other auxiliary materials, and are made using the most advanced fully automatic geotechnical production equipment in the world through three-layer co-extrusion technology. This production line is highly automated. From order input, formula, feeding, processing to quality monitoring, it is fully automatically controlled by computers and operated strictly based on scientific data. And it can use the latest raw materials (with super tensile strength) such as traditional ones, D, etc. at the same time. All products are produced in accordance with the American D standard and meet or exceed the national standard product specifications. Complete thickness. - Width - Meets the anti-seepage requirements of artificial lakes, sewage pools, reservoirs, environmental protection, mining and chemical industries, etc. Penetration and anti-corrosion requirements.
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The width of the waterproof board - the weight is square meters It has the characteristics of large size, acid and alkali resistance, corrosion resistance, aging resistance, and good anti-seepage performance. It can meet the needs of civil engineering such as anti-seepage, isolation, reinforcement, and anti-crack reinforcement in water conservancy, municipal administration, construction, transportation, subways, tunnels, and engineering construction. Because it uses polymer materials and adds anti-aging agents in the production process, it can be used in unconventional temperature environments. This waterproof board is often used for anti-seepage treatment of dams and drainage ditches and anti-fouling treatment of waste yards. On-site construction of waterproofing boards
On-site construction of waterproofing boards
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Now is the peak season for waterproofing board production, and it is also the best time to use it for the reinforcement of waterproofing boards. Due to changes in weather, the need for waterproofing boards The emergence of this phenomenon that construction has certain beneficial effects has caused some increase in the price of waterproof boards and raised the price of waterproof boards. Although the increase in the raw material D particles of waterproof boards will also increase accordingly, the particles of waterproof boards must also have quality and color. Purity ensures the production of the best waterproofing panels. Therefore, cutoff trenches must be dug around the perimeter and the waterproofing boards should be buried in the trenches. The quality inspection of the waterproofing boards will be carried out with different progress according to the construction environment. This will equally reduce the factory price of the waterproofing board. The actual growth trend of the waterproofing board price is conducive to users. The most reliable and value-for-money waterproof board.
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Strength: The tensile strength in all directions is higher than other needle-punched non-woven fabrics under the same weight specifications.
Resistance to ultraviolet light--has extremely high resistance to ultraviolet rays.
Extremely high temperature resistance--it can withstand high temperatures up to ℃ and still maintain structural integrity and original physical properties at high temperatures.
Permeability and plane drainage--the waterproof board is thicker and needle-punched, with good plane drainage and vertical water permeability, and can still maintain this performance after many years.
Creep resistance--The creep resistance of the waterproof board is better than other geotextiles, so it has good long-term performance. It can withstand the corrosion of common chemicals in the soil and the corrosion of gasoline, diesel, etc.
Elongation--the waterproof board has a good elongation rate under a certain stress, allowing it to adapt to uneven and irregular base surfaces.
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, excellent flexibility, impermeability, elongation and wear resistance
, good isolation and puncture resistance
, no Chemical pollution
Resistant to acid, alkali and various chemical substances, good dimensional stability, good adhesion and easy construction.
Collapse and edit this section indicator standard
Serial number
Project
Indicator
D
D
D
Ordinary
Environmental protection
Thickness

Width

Tensile strength (vertical and horizontal)
=
=
=
=
=
Elongation at break (length and width) %
=
=
=
=
=
Right-angle tear strength/< br/> =
=
=
=
=
Water vapor permeability coefficient
.*
.*
.*
Operating temperature range
+℃﹋-℃
+℃﹋-℃
+℃﹋-℃
Carbon black content %
Environmental stress cracking resistance
=
-℃ low temperature impact embrittlement performance
Passed
℃ Oxidation induction time
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Collapse waterproof Board construction process
. Preparation work before laying:
. Foundation treatment: the substrate is required to be flat
. Contact surface with the membrane
. Laying method:
. Along a certain direction When laying, do not pull it too tightly and leave a certain amount of expansion and contraction to adapt to the deformation of the substrate.
. When laying the waterproof board, the direction of each unit should be adjusted to facilitate the welding of the two units.
. After the waterproof board is laid, it should be pressed with sand bags to prevent wind and sand from affecting the welding of the edges in the next step.
. Waterproof board welding and seam treatment are key construction procedures. Generally, the thermal welding method is used to heat the surfaces where the membranes are connected to melt the surfaces and then fuse them into one through pressure.
.It is required that there should be no oil, water, dust, etc. at the edge joints of the laid waterproof panels.
. Before welding, it is necessary to adjust the two side single films at the seam so that they overlap to a certain width. The overlap width is generally ~cm and is smooth and wrinkle-free.
. Use a special welding machine for welding.
Construction specifications for folding waterproof boards
Preparation work before laying:
. Foundation treatment: Cleaning the paving surface requires the base to be flat, the soil to be solid, no unevenness, cracks, etc., and no sharp objects such as stones, iron wires, etc. The roots of turf trees within the anti-seepage range such as wooden sticks should be removed and weeds should be sprayed with herbicides.
. A layer of sand or clay with small particle size should be laid on the contact surface with the membrane as a protective layer. The thickness of the protective layer should not be less than cm.
Laying method:
. Lay in a certain direction and do not pull it too tightly. There should be a certain amount of expansion and contraction to adapt to the deformation of the substrate.
. When laying the waterproof board, the direction of each unit must be adjusted to facilitate the welding of the two units
. After the waterproof board is laid, it must be pressed with a sand bag to prevent wind and sand from affecting the welding of the next edge
/> Waterproof board welding:
. Joint treatment is a key procedure in construction. Generally, the thermal welding method is used to heat the surfaces of the membranes to melt the surfaces and then fuse them together through pressure.
.It is required that there should be no oil, water, dust, etc. at the edge joints of the laid waterproof panels.
. Before welding, it is necessary to adjust the two side single films at the seam so that they overlap to a certain width. The overlap width is generally ~cm and is smooth and wrinkle-free.
. Use a special welding machine for welding.
Weld quality inspection:
. The inspection method should be the inflation method and indoor test. Spark test or ultrasonic detection method can also be used.
. The testing equipment adopts air pressure detector and vacuum detector.
Weld quality requirements:
. The inflation length of the double seam is -mm. The inflation pressure between the double welds reaches -. Maintain - and the pressure does not drop significantly, it is qualified.
. For single welds, shaped joints and repair points, ㎝㎝ squares should be used for vacuum testing. The vacuum pressure is greater than or equal to. If the soap solution does not bubble, it is qualified.
. Indoor test. The tensile strength of the weld should be greater than the strength of the base metal.
. Quality inspection should be carried out as construction progresses.
.Reference basis: "Waterproof Board Application Technology Engineering/-"
Analysis of causes of waterproof leakage of folded waterproof boards
The failure of waterproofing systems in tunnels and underground projects refers to the use of waterproofing systems and materials. Due to external erosion damage or internal material weakening, the ability to resist the groundwater environment is weakened or completely lost. Analyze and study the failure influencing factors and mechanisms of underground projects in different groundwater environmental media, the impact of substances produced by failed materials on the performance of surrounding structures, establish and evaluate various failure influencing factor indicators and failure detection methods are underground Important issues that should be studied in engineering waterproofing systems.
1. Reasons for waterproof construction
The aforementioned statistics show that the waterproof construction stage is the main link in underground engineering waterproofing leakage. After analyzing some waterproofing leakage cases, it was found that there are reasons for both careless construction and workmanship. Reasons for construction management and inspection At the same time, the reasons for waterproofing and leakage of underground projects using different construction methods are also different.
. Composite lining tunnels generally use polymer waterproofing sheets (coiled materials). The main reasons for their failure are: the waterproofing coiled material itself cannot closely adhere to the shotcrete primary lining, and the impact during installation, and protrusions on the back are easy to cause Punctures in the waterproof board will cause water leakage. A slight carelessness in the weak joints between the boards will cause the entire waterproofing system to fail. If there are large holes and uneven areas on the concrete wall, the secondary lining will be extruded and the surrounding rock will deform. The waterproof board is stretched, especially the joint parts, which are prone to breakage and damage.
. The reasons for leakage of tunnel and underground engineering waterproofing systems with spray waterproofing are: it is difficult to ensure the uniformity of spray waterproofing membranes. Although generally sprayed materials have good ductility, their tensile strength is low. If a large external force acts on the structure, Deformation and displacement will easily lead to the rupture of the waterproof membrane and the failure of the entire waterproof system. In addition, this construction method requires high precision in the spraying construction process, which is difficult to achieve in general projects.
. The reasons for the failure of the waterproofing system of self-waterproof concrete are: the underground engineering working surface is small, the vibrating density of the concrete is difficult to meet the design impermeability requirements, and the construction deformation joints are also the weak link of this waterproofing measure.
The above reasons indicate that the waterproof construction process is an important link in ensuring project quality. Therefore, the importance of waterproof construction should be strengthened. Corresponding construction rules should be formulated for different waterproofing methods and a waterproof construction quality inspection mechanism should be established.
2. Reasons for waterproof design
Some designers do not have enough understanding of the importance of waterproofing and believe that underground water leakage will not affect the safety of the structure. They do not pay enough attention to the selection of materials and design methods. Therefore, in the waterproof design plan Insufficient careful research combined with structural characteristics leads to unreasonable waterproof design.
Leakage caused by waterproof design concept issues: At present, the service life of underground projects is more than 10 years, but the service life of waterproof materials cannot meet this requirement. Therefore, the waterproof design of underground projects should consider the maintainability of the drainage system. and ease of replacement.
Leakage caused by economic issues in waterproof design: Although waterproofing projects account for a small proportion of the total project cost in underground projects, designers often choose low-cost materials because of cost considerations, which also leads to waterproofing. Cause of leakage. One eight seven Dongfang Lu five five plus seven thirty six. Eighty six. Dongfang Geomaterials Co., Ltd. specializes in the production of filament geotextiles, waterproof panels, self-adhesive waterproof panels, geomembranes, waterproof blankets and other geotechnical materials.
3. Reasons for the variation of waterproof materials
According to research, it is found that due to the variation of waterproof material materials, a large proportion of waterproofing system failures occur. The reasons include the weakening of waterproof material performance by groundwater environment and microbial erosion, The inherent weakness of existing waterproof materials is that the waterproof function gradually loses due to the harsh environment of use and the passage of time. For example, the waterproof membrane of a railway tunnel has deteriorated and aged during maintenance. The main reasons for these situations can be summarized as follows: Inferior concrete additives contain high concentrations of alkaline components and salt substances that are not easily decomposed, causing the concrete structure to become soft. The precipitated substances have an erosive effect on the waterproof membrane, causing freeze-thaw cycles The structural variation of waterproof materials, microbial erosion, variation of bonding materials, erosion of materials by acids, alkalis, and salt ions containing different concentrations in groundwater, and instability of the material structure of waterproof materials lead to variations in the structure and organization of the materials.
4. Causes of Engineering Structural Variation
Underground engineering has been in a complex environment for a long time, resulting in many unfavorable factors for structural variation. Once variation occurs, the lining structure will undergo displacement and deformation, cracking, concrete spalling and other phenomena, which will cause Waterproofing system failed. For example, due to the rheological nature of the surrounding rock, the stress of the surrounding rock in the later stage may cause the waterproofing board to be squeezed from the first lining and the second lining for a long time during the long-term adjustment process, causing puncture damage to the unbalanced base surface or protruding points, resulting in waterproofing. Layer failure. In situations where the temperature difference between the four seasons is large, freezing and thawing alternate year-round, and the residual deformation accumulates year by year under the strong effect of frost heave force, causing the lining structure to shift and crack, leading to the gradual failure of the waterproof layer. Variations caused by material deterioration of the structure itself, such as concrete carbonization, salt damage, alkali aggregate reaction and other precipitates, are also causes of damage to the waterproofing system.
5. Reasons for maintenance and management
The drainage system is blocked. If the waterproofing system is not properly maintained, long-term accumulation of large water pressure will cause structural cracks and damage the waterproofing system. The frost heave force generated by freezing tunnels in severe cold areas is an important cause of structural cracks and drainage pipe blockage and rupture. Therefore, the maintenance and repair of tunnels and underground projects is very important.
Waterproof board product pictures
Waterproof board
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Low density polyethylene (D), linear low density polyethylene (D), high density polyethylene (D ), ethylene/vinyl acetate copolymer, polyvinyl chloride, ethylene vinyl acetate modified asphalt (), etc.