White Tpo Waterproof Membrane Fireresistance For Underground Engineering

Tpo Waterproof Membrane For Underground Engineering

Product Introduction

 For underground engineering applications, TPO waterproof membranes mainly use L products with fiber backing. For some scenarios requiring high strength, Type P reinforced are used in combination. The mainstream thicknesses are 1.2mm and 15mm. The bottom surface of the membrane is laminated with high-strength polyester-woven fabric backing; some derivatives are self-adhesive products pre-coated with butyl rubber-adhesive on the outer side of the backing layer, suitable for construction needs on damp underground substrates. This type of product is a waterproof membrane specially developed for spaces such as basements, metro tunnels, urban utility tunnels, etc., complying with the national standard GB 27789-201, and also suitable for the special working conditions of underground engineering with long-term exposure and easily-deformable substrates.

Product Features

 The core advantage of this type of roll is that the between its backing layer and concrete substrate is extremely strong, which can form a firm "interlocking" effect with the structural poured later, preventing the formation of a water migration layer between the waterproof layer and the structural layer, thus fundamentally solving the industry pain point that it is difficult locate leakage points after underground engineering leakage. It has excellent resistance to acid, alkali and salt corrosion, and can withstand long-term chemical erosion underground soil and groundwater, and will not be corroded or damaged by microorganisms algae in the underground environment. Meanwhile, the low-temperature flexibility of this roll is excellent; can bend without cracking at -40℃, adapt to the slight deformation caused by uneven settlement of underground structures, and will not be easily torn. The-adhesive product can also be constructed directly on a wet substrate without waiting for the substrate to be completely dried, which greatly shortens theing construction period of underground engineering.

The construction steps adopt the mechanical fastening method

First, clean the roof base and ensure the flatness error is no more than 5mm; unroll the reinforcedPO membrane loosely and let it stand for 15-30 minutes to release internal stress; it with galvanized screws and washers in the lap area of the membrane, top layer of the membrane completely covers the fasteners, finally weld the lap edges with a air welder, the weld width is not less than 40mm, and conduct an air tightness test after completion.