Bridge waterproof construction is a very professional construction operation. It requires not only the use of high-quality waterproof coils and waterproof coatings, but also the tacit cooperation of a professional waterproof team. Bridge waterproofing is indispensable for the use of waterproof coils. The coiling requires a professional master and equipment to operate. So, what are the high requirements for the construction of bridge deck waterproofing coils?

What are the high requirements for bridge deck waterproofing membrane construction?
1. Have a strong affinity
The bridge deck waterproofing membrane must have strong affinity with the cement concrete at the base and the asphalt concrete on the surface at the same time. The bonding strength at 150 ℃ is not less than 0.14MPa, which ensures the stability of the pavement and bridge deck structure when paving asphalt concrete. The waterproof layer is shifted.

2. Crack resistance
Under the multiple pressures of cement concrete, temperature difference and load, cracks in the waterproof membrane will inevitably occur due to the passage of time, and the cracks will continue to change with time. Therefore, the bridge deck waterproof membrane must have the ability to resist cracks and prevent deformation.

3. Resistant to high and low temperatures
The bridge deck will be paved with hot asphalt. The bridge deck waterproofing membrane should have high heat resistance, which is required to withstand at least 130 ° C and maintain a good waterproof layer. It can effectively prevent cracks on the pavement and bridge deck waterproof layer in cold winter conditions, and can withstand low temperatures of -20 ° C.

4. Fatigue resistance
The bridge deck waterproofing membrane should be resistant to fatigue and can absorb the stress caused by the micro-cracks in the concrete without breaking.

5. Avoid leaks at the seams
If the waterproof coil is applied in the wrong direction and overlap direction, and the width of the long and short edges of the short side and the two adjacent coils does not meet the requirements, it often leads to leakage at the joints of the waterproof layer of the roofing membrane. , Please avoid, pay attention to inspection.

6. No air bubbles or empty drums
Due to the poor control of the uniformity of the manual coating of the base glue, the thickness of the coating is thin and thick, which causes the solvent in the glue to volatilize under the same drying time, which makes the solvent volatilize after the waterproof membrane is bonded. As a result, air bubbles are generated and empty drums are formed. The operators who need to apply the base glue are highly professional and careful.

7. Good salt water resistance
Because salt is used to melt snow in the north, the waterproofing membrane for roads and bridges also has better saltwater resistance, and the asphalt itself has better salt resistance. The tire base of the membrane should be fully saturated to ensure the long-term waterproof effect of the waterproofing membrane.

8. Protective waterproof layer
If the foundation construction of the equipment is completed after the waterproof layer is completed, the waterproof layer will be damaged due to the foundation weight, and if the damaged waterproof layer is not repaired during the hole construction, the waterproof layer will also be damaged. Therefore, after the construction of the waterproof membrane on the bridge deck, the waterproof protective layer should be prepared in time.

The quality of bridge waterproofing and construction technology requirements are very high. Bridge waterproofing is not only to prevent leakage below the bridge, but if the waterproof layer is not completed, rainwater penetration will corrode the cement reinforcement, which seriously affects the safety and use of the bridge Life span, so bridge waterproofing is essential.