how to waterproof a water feature ?
waterproof a water feature

how to waterproof a water feature ?

For inquiry:[email protected]

whatsapp:86 18554215652

The most critical link in hard waterscape construction is waterproofing

The quality of the waterproofing directly determines the service life of the water feature.

In waterscape construction, our commonly used waterproof materials include waterproof roll material,waterproof coatings, waterproof blankets,waterproof membranes.

Different waterproof materials have different characteristics and are suitable for different environments.

PART?01

waterproof roll material

Waterproofing membrane is a flexible waterproof building material product that can be rolled into a roll for waterproofing construction. It is the first barrier to waterproofing in the entire project. It mainly includes asphalt waterproofing membrane and polymer waterproofing membrane. Features such as water resistance, temperature stability, flexibility and atmospheric stability

1

EPDM rubber roof waterproof membrane

EPDM rubber waterproof membrane

EPDM rubber waterproofing membrane is made of EPDM rubber mixed with an appropriate amount of butyl rubber, vulcanizing agent, accelerator, softener and reinforcing agent, etc., and undergoes processes such as internal mixing, tab filtering, and extrusion molding. Processed. Since there are no double bonds in the main chain of the EPDM rubber molecular structure, when it is exposed to the effects of ozone, ultraviolet rays, and damp heat, the main bonds are not easily broken, so it has excellent weather resistance and aging resistance. It also has high tensile strength, large elongation, strong adaptability to base layer expansion or cracking, high value, light weight, and wide operating temperature range (can be used for a long time in the range of -40 to +80°C). It is an efficient waterproof material. . It can also be used for cold construction, is easy to operate, reduces environmental pollution and improves workers' working conditions. There are vulcanized and non-vulcanized types on the market.

Construction technology

During roll material paving construction, depending on the specific conditions of the project, the full paving method, strip paving method, spot paving method, and empty paving method can be used.

When bonding the membrane to the base layer, apply the adhesive evenly on the bonding area and let it sit for a while until the surface of the adhesive becomes slightly sticky but not stringy. The relevant regulations on overlap width can be implemented.

Use solvent to wipe the roll material at the overlapping part clean to remove dirt and grease, and then apply adhesive. After the adhesive is dry, stick the overlapping part firmly and compact it with a rubber roller.

EPDM rubber roof waterproof membrane

Precautions

Do not lay self-adhesive membranes on frozen substrates.

Construction cannot be performed on base layers that are contaminated or have high moisture content.

The packaging and release paper of self-adhesive rolls can only be removed before and during laying;

When the sealant is used up, the container must be tightened and sealed in time;


2

SBS modified asphalt waterproofing membrane

SBS modified asphalt waterproofing membrane

SBS modified asphalt waterproofing membrane adopts domestic leading technology and direct mixing process. It uses thermoplastic elastomer rubber modified asphalt as the base material, and uses polyester felt, glass fiber felt, and glass fiber reinforced polyester felt as the carcass. Various types of modified asphalt waterproofing membranes produced by covering with metal aluminum foil, sand or PE film are one of the new waterproofing materials promoted by the Ministry of Construction.

Features

It has good flexibility at low temperatures and will not crack when it reaches -25℃; it has high heat resistance and will not flow at 90℃. It has the characteristics of good elongation performance, long service life, simple construction and low pollution.

Process requirements

The base layer must be dry, flat, clean, free of dust, debris, oil, and moss. If there are any holes, holes, or cracks, they must be filled with cement mortar, and the protruding parts must be chiseled.

Construction technology

Apply the base treatment agent against the wind.

Apply adhesive to the surface of the base layer and the membrane surface, and reserve overlapping edges for applying joint glue.

Lay the membrane, exhaust and compact it.

Precautions

It should be protected from sunlight and rain, and should be stored in a dry and ventilated environment. The storage temperature should not be lower than 0°C and not higher than 50°C, the flexibility test temperature of the product of the corresponding specification. It should be stored vertically, with a height of no more than two floors.

During transportation, it must be placed upright, with a height of no more than two layers. It must be prevented from tilting or lateral pressure, and it must be covered with a tarpaulin if necessary.

Under normal storage and transportation conditions, the storage period is one year from the date of production.

Transport and storage should be kept away from fire sources.

sbs modified bituminous waterproofing membrane

3

polypropylene waterproof membrane

polypropylene composite waterproof membrane is developed based on the full study of existing waterproof and anti-seepage membrane products and according to the new requirements of my country's modern engineering for waterproof and anti-seepage materials. This product uses synthetic polymer materials as the main raw materials, adopts new technologies and new processes, and is manufactured through one-time thermoplastic molding. It is an environmentally friendly composite waterproof material that integrates a reinforced protective layer, an anti-aging layer, a waterproof layer and a viscosity-increasing strength.

Features

It has excellent cracking resistance; wide operating temperature range, long life, non-toxic, harmless and pollution-free, and is widely used in drinking water projects abroad.

Process requirements

The waterproof base layer must be strong, flat, clean, and dry; the corners of the base layer should be made into arcs or triangles, and the radius of the arc should be greater than 20 mm. If used on the roof, attention should be paid to the drainage slope, dividing joints, exhaust holes, etc. of the roof, which should be handled according to the design requirements.

Construction technology

Accept and clean the base layer (leveling layer) → Prepare adhesive (prepared as needed) → Process additional layers in complex parts (yin and yang corners, cornices, drains, pipe holes, etc.) → Construction of waterproof layer → Inspection of waterproof layer → Construction acceptance of protective layer back.

Precautions

Contact with acids, alkali, mineral oil, petroleum jelly and other chemical substances that affect the performance of polyethylene should be avoided. Contact with high temperatures above 80°C should be avoided to avoid permanent deformation of the membrane.

During transportation and storage, attention should be paid to packaging damage and placed in a ventilated and dry place. The height of the storage stack should not exceed the height of five rolls laid flat.

The storage period is 1 year from the date of production.

polypropylene waterproof membrane

4

PVC waterproof membrane

PVC waterproof membrane

PVC waterproof membrane is a polymer waterproof sheet with excellent performance. It uses PVC resin as the main raw material and adds processing aids such as hope enhancer, anti-UV agent, anti-aging agent, stabilizer and other processing aids. It is produced by extrusion method. Molecular waterproofing membrane.

Features

It has a long service life and is resistant to aging. The roofing material can be used for more than 20 years and the underground material can be used for 50 years.

High tensile strength, high elongation, and small dimensional change during heat treatment.

It has good low-temperature flexibility and adapts well to changes in environmental temperature differences.

It has good root penetration resistance and can be used as a planted roof.

Good resistance to puncture and impact.

It is easy to construct, wide in width and has few overlaps, weldable, strong and reliable, and environmentally friendly and pollution-free.

It has strong chemical corrosion resistance and is suitable for special occasions.

It has good plasticity and is easy and quick to process the details of corners.

It has good water vapor diffusivity, condensation is easily discharged, and moisture and moisture left in the base layer are easily discharged.

Classification

Homogeneous membrane (H type): PVC waterproof membrane without internal reinforcement or backing material.

Fiber-backed membrane (L type): PVC waterproof membrane with fabric such as polyester non-woven fabric laminated on the lower surface of the membrane.

Fabric reinforced membrane (P type): PVC waterproof membrane reinforced with polyester or fiberglass mesh in the middle of the membrane.

Process requirements

When laying PVC waterproof membrane, attention should be paid to the construction environment temperature. The membrane can only be used when the temperature reaches -5℃ or above. When using the full-bond method for construction, the coiled material must be used when the temperature reaches above 5°C, and additional layers should be made in special parts.

Construction technology

Hot air welding

Precautions

When paving PVC waterproof membrane, additional layers should be made in special areas.

Attention should be paid to construction protection. The membrane should be temporarily fixed before the end of daily construction to prevent it from being blown up by the wind.

The construction of the waterproof layer should be carried out after the previous process is completed, and no cross construction is allowed. If you need to install equipment on a roof with waterproof membranes, an additional layer should be added to the foundation of the equipment. If you need to build a high-rise house on the waterproof layer, it must be done after the waterproof layer has been inspected and accepted.

pvc waterproof membrane for roof

PART 02

waterproof blanket

1

Geosynthetic Clay Liner

Geosynthetic Clay Liner

Geosynthetic Clay Liner is a geosynthetic material specially used to prevent leakage in artificial lakes and waterscapes, landfills, underground garages, rooftop gardens, pools, oil depots and chemical storage yards. It is made of highly expandable Sodium bentonite is filled between a special composite geotextile and non-woven fabric. The bbentonite waterproof membrane made by acupuncture method can form many small fiber spaces, so that the bentonite particles cannot flow in one direction and remain in the mat when encountering water. Form a uniform and high-density gel-like waterproof layer to effectively prevent water leakage.

Classification

Natural bentonite clay is mainly divided into two categories according to its chemical composition: sodium-based and calcium-based. Bentonite has the characteristic of swelling when exposed to water. Generally, when calcium-based bentonite swells, its expansion is only about 3 times its own volume.

When sodium bentonite meets water, it absorbs 5 times its own weight of water, and its volume expands to more than 15-17 times its original size. The sodium bentonite is locked between two layers of geosynthetic materials, which plays a role in protection and reinforcement, giving GCL a certain overall shear strength.

Features

Compactness: Sodium bentonite forms a high-density diaphragm under water pressure. When the thickness is about 3mm, its water permeability is less than &×10ˉ11m/sec, which is equivalent to 100 times the compactness of 30cm thick clay. It has strong natural Water retention properties.

Permanent waterproof performance: Because sodium bentonite is a natural inorganic material, it will not age or corrode even after a long time or the surrounding environment changes, so it has long-lasting waterproof performance.

Easy construction and short construction period: Compared with other waterproof materials, the construction is relatively simple and does not require heating and pasting. Simply use bentonite powder and nails, washers, etc. to connect and secure. No special inspection is required after construction, and it is easy to repair if waterproofing defects are found. GCL has the shortest construction period among existing waterproof materials.

Not affected by temperature: will not break brittle in cold climates.

Integration of waterproof materials and objects: Sodium bentonite has an expansion capacity of 20-28 times when exposed to water. Even if the concrete structure vibrates and settles, the bentonite in GCL can repair cracks on the concrete surface within 2mm.

Green and environmentally friendly: Bentonite is a natural inorganic material that is harmless to the human body and has no special impact on the environment. It has good environmental performance.

Process requirements

The base layer should be inspected before construction of the bentonite waterproof blanket. The base layer should be smooth, free of pits, water accumulation, stones, tree roots and other sharp objects.

During the transportation and construction process of the bentonite waterproof blanket, vibration and impact should be avoided as much as possible, and it is best to put it in place at one time.

After the GCL installation and acceptance, the HDPE geomembrane must be installed as soon as possible to prevent it from being wetted by rain or torn or dirty.

Construction technology

Bentonite waterproof blanket material has a heavy weight and should be transported and laid using a shovel machine.

Bentonite waterproof blanket materials are connected by lap joints.

When laying bentonite waterproof blankets on slopes greater than 10%, the number of overlaps along the length of the slope should be minimized. The bentonite pads on the slope must exceed the slope foot line by more than 1500mm.

Any equipment used to lay bentonite waterproof blankets must not be driven on top of already laid geosynthetic materials. When installing bentonite waterproof blanket, the outdoor air temperature cannot be lower than 0℃ or higher than 40℃.

All exposed edges of the bentonite waterproof blanket must be immediately compressed with sandbags or other heavy objects to prevent the bentonite waterproof blanket from being blown by the wind or being pulled out of the peripheral anchoring trench. The bentonite waterproof blanket cannot be deployed in windy weather conditions to prevent it from being blown up by the wind.

The bentonite waterproof blanket must be laid in such a way that the bentonite waterproof blanket is in direct contact with the foundation below and wrinkles are eliminated.

When laying the bentonite waterproof blanket, try to reduce the dragging of the bentonite waterproof blanket on the foundation to avoid damage to the contact surface between the bentonite waterproof blanket and the ground. If necessary, a temporary layer of geotextile can be placed on the ground to reduce damage caused by friction during the laying process of the bentonite waterproof blanket.

The laying and overlapping of bentonite waterproof blankets should be parallel to the direction of slope inclination. If the slope is greater than 4:1, there should be no lateral overlap of bentonite blankets within 1m from the top of the slope or the slope. The overlapping method of bentonite waterproof blankets is to overlap the ends of two bentonite blankets to prevent loose soil or gravel from entering the overlap area.

bentonite waterproofing installation

PART 03

Geomembrane

geomembrane

(pe,tpo,eva,pvc) geomembrane. It is a composite geomembrane made of a multi-layer co-extruded film (anti-seepage membrane) and needle-punched geotextile using a thermal composite process. Polyethylene geomembrane is a flexible anti-seepage material with a high anti-seepage coefficient and good heat resistance and cold resistance. The ambient temperature can be as high as 100 degrees and as low as minus 70 degrees.

Features

High anti-seepage coefficient: The anti-seepage membrane has an anti-seepage effect that is unmatched by ordinary waterproof materials. The HDPE anti-seepage membrane has high tensile resistance and mechanical properties. Its excellent elasticity and deformation ability make it very suitable for expansion or contraction of the base surface. It can effectively overcome the uneven settlement of the base surface and has a high water vapor permeability coefficient.

Chemical stability: The anti-seepage membrane has excellent chemical stability and is widely used in sewage treatment, chemical reaction tanks, and landfills. It is resistant to high and low temperatures, asphalt, oil and tar, and is resistant to corrosion by more than 80 strong acid and alkali chemical media such as acid, alkali and salt.

Aging resistance: The anti-seepage membrane has excellent anti-aging, anti-ultraviolet, and anti-decomposition capabilities. It can be used naked and has a service life of 50-70 years, providing a good material guarantee for environmental anti-seepage.

Resistant to plant roots: HDPE anti-seepage membrane has excellent puncture resistance and can resist most plant roots.

High mechanical strength: The anti-seepage membrane has good mechanical strength, with a tensile strength at break of 28MPa and an elongation at break of 700%.

Low cost and high efficiency: HDPE anti-seepage membrane uses new technology to improve the anti-seepage effect, but the production process is more scientific and faster, so the product cost is lower than traditional waterproof materials. According to actual calculations, general projects using HDPE anti-seepage membrane will save money. About 50% of the cost.

Fast construction speed: The anti-seepage membrane has high flexibility. It has a variety of specifications and laying forms to meet the anti-seepage requirements of different projects. It adopts hot-melt welding, the weld seam is high in strength, and the construction is convenient, fast and healthy.

Environmental protection and non-toxic: The materials used in the anti-seepage membrane are all non-toxic and environmentally friendly materials. The principle of anti-seepage is ordinary physical changes and does not produce any harmful substances. It is the best choice for environmental protection, breeding and drinking water pools.

Process requirements

After foundation shaping and excavation, the slope must be cut, leveled, rolled or tamped. The replacement and backfilling of disturbed soil should be sprinkled with water, rolled or compacted in layers, with the thickness of each layer ≯ 400mm.

Remove exposed materials on the surface of the foundation that may cause punctures, such as bricks, stones, and tiles; glass and metal debris; branches, plant roots, etc. Clear any obstacles in the site and provide necessary laying construction conditions.

The installation and reservation of surrounding retaining walls, pump pits, and underwater pipe openings must be completed before the construction of the composite geomembrane.

Construction technology

Foundation excavation and making lake bottom mortar protective layer (H20-30mm)

Slope, Densify and Smooth

Composite geomembrane and vertical retaining wall pasting

Base surface smoothing, cleaning, process handover

Sealing and water-stopping of underwater water pipe openings

Composite geomembrane laying and welding

Process handover

Welding and repair quality acceptance

liner geomembrane welding machine

www.idgeomembrane.com


要查看或添加评论,请登录

社区洞察

其他会员也浏览了