HDPE waterproof coil

Ch-hdpe self adhesive membrane waterproof roll

Ch-hdpe self-adhesive membrane waterproof roll (referred to as high polymer self-adhesive membrane waterproof roll in the underground engineering specification) is mainly made of special high-density polyethylene membrane. The main waterproof layer is provided with self-adhesive layer, environmental change resistant protection layer and isolation layer, and 70mm wide self-adhesive lap edge is reserved on the long side and side of the roll. The self-adhesive layer and anti environmental change protective layer have self-healing function. After reaction and consolidation with liquid concrete slurry, the waterproof layer forms a seamless combination with concrete structure to eliminate the hidden danger of water channeling between layers, which can effectively improve the reliability of waterproof system

Product classification:

I type and ear type according to performance

Product specification:

Coil width (m): 1.2; 2.4

Coil thickness (mm): 1.2; 1.5

Coil length (m): ≥ 20

For ch-hdpe self-adhesive membrane waterproof roll, HDPE is the main waterproof layer (0.8-0.9mm thick). A layer of self-adhesive (about 0.25mm thick) is coated on the whole roll surface. 70mm (sample) - 80mm (domestic technical regulations) is the lap area (the roll and the roll are self-adhesive). The part from the other edge of the roll to the lap area is the main area of the roll. The main area is above the adhesive layer Cover the anti bonding layer, the coating is non sticky by hand, and the composition is shown in the cross section:

Compared with the advantages of pre laid anti stick Asphalt Roll

(1) HDPE coiled material has a protective coating, which can react with cast-in-place concrete to form a solid combination with concrete.

(2) HDPE roll adhesive is 100% organic compound adhesive, and its cohesive strength is much greater than SBS / APP modified asphalt adhesive.

(3) there is wetting agent in HDPE adhesive, its wetting effect can make the bonding interface reach the molecular level close contact. The surface of similar asphalt self-adhesive coiled material depends on the physical adhesion ability of asphalt and concrete. The product is the chemical reaction of surface protective coating and cast-in-place concrete, forming an organic combination. Higher mechanical properties

Purpose:

This product is suitable for building basement, subway, cavern, tunnel, subway, municipal construction and other waterproof and impermeable projects.

Type I is used for facade, with a thickness of 1.2mm;

Type A is used for plane, with a thickness of 1.5mm

Construction method

This product is constructed by pre laying and anti sticking technology

Mechanism of pre laying anti sticking technology

The bonding between the pre laid anti adhesive roll and the cast-in-place concrete is a kind of strong occlusive bonding, which is caused by the interlocking of the pressure-sensitive adhesive layer of the flowing liquid concrete and the roll. When the flowing liquid concrete is poured on the surface of the pre laid anti sticking coiled material, there are tiny grooves and bulges at the interface of the two materials under the microscope observation, which make the coiled material and the concrete lock each other, and the contact with the concrete reaches the full state in an instant and forms a whole.

Construction preparation

1) construction scheme

According to different waterproof engineering requirements, the construction scheme of pre laid self-adhesive waterproof roll shall be prepared and implemented after discussion and approval of the competent department.

2) cushion or other foundation surface treatment

(1) several surfaces of horizontal cushion shall be solid, compact, flat and smooth, and there shall be no gap or hole larger than 12mm on the surface of base course. If there is honeycomb, pitted surface or crack

The gap and hole shall be repaired in advance.

(2) vertical base surface shall be provided with facade support first, and plywood or other slats with thickness of 19mm shall be used, or concrete shall be used as facade support, and plywood shall be installed

The joint shall be tight and the gap shall not be more than 12mm.

3) tool supporting materials

Nail shooting gun, fixed nail, press roll, scissors / cutter, spring box, hot air machine, etc.

4) supporting materials.

Non woven fabric, cement nail, concealed nail ring, gasket, rubber sealing strip, neoprene adhesive.

Construction process

1) bottom plane construction

Clean the line snapping on the first base layer → lay the pre laid anti stick waterproof roll + roll overlapping treatment → node construction → self inspection → acceptance > uncovering the isolation membrane of the roll → binding the steel bar → pouring the concrete

2) vertical construction

Installation of facade support + Inspection and cleaning of facade base surface + positioning and snapping of coiled material I → laying of pre laid anti adhesive waterproof coiled material → mechanical fixation of coiled material + overlapping treatment of coiled material → node construction → self inspection + acceptance - → uncovering of coiled material isolation membrane I binding of steel bars → pouring of concrete

3) tunnel vault

Tunnel vault → snapping line + installing support (gasket or hanging nail) → laying pre laid anti sticking coiled material - mechanical fixation of waterproof coiled material (welding or hanging bundle) → lapping treatment → section

Point treatment → uncovering waterproof membrane, binding reinforcement and pouring concrete.

Construction precautions

1. The ambient temperature of coiled material paving shall be above - 4 ° C. Otherwise, the coiled material is not firmly overlapped and the waterproof is invalid;

2. The coiled material can be directly laid on the "uncompleted concrete" or the wet base surface without ponding, but the base surface shall be flat and firm without obvious ponding;

3. The long side of the coiled material shall be overlapped by self-adhesive edge with a lap width of 70mm; the short side shall be overlapped by adhesive tape with a width of 80mm, and the joint area at the end of the coiled material shall be staggered with each other;

4. During facade construction, mechanical fixation shall be carried out every 400 ~ 600mm within 10 ~ 20mm from the self-adhesive edge to the edge of the coiled material, and the fixed position shall be fully covered by the coiled material;

5. Long side lapping relies on self adhesive film. Make sure that the lapping is firm, with foreign data, and hot air is also needed for low-temperature construction.

6. The reinforcement is directly placed on the coiled material without any protection, but the waterproof layer shall not be damaged; the concrete shall be poured and tamped within 40 days after the installation of the coiled material

7. The operator must be trained before taking the post;

8. Personnel wearing spikes are strictly prohibited to enter the coiled material construction site;

9. Pay attention to on-site protection during construction to prevent from being blown by wind;

10. Smoking is not allowed on the construction site.

11. Packaging, transportation and storage

12. The coiled material is cylindrical and packed with suitable materials.

13. During transportation and storage of coiled materials