Polythene Sheet For Concrete

Roadways must be properly and effectively protected for safety and long term reliability concrete.

Polythene sheet for concrete.

Polythene sheet roadway expansion projects must fill a number of requirements to minimise environmental impact. Under slab vapor retarders play a very important role in retarding moisture from coming up through the concrete and into the structure. It is recommended that the sheet should be at least 0 25 mm thick 1200 gauge. Typical 8 mil polyethylene sheeting costs 5 to 7 cents per square foot.

Vapor barriers also block gases such as methane or radon. Keep w c at or below 0 5. Radon is the second leading cause of lung cancer in the u s according to the american lung association. Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders.

Polyethylene sheeting under concrete slab. These products are made. Starting with lower water cement ratio concrete will let the slab dry faster. The general standard employed for the testing and verification of polythene sheets for use as a vapor barrier is the astm4397.

Polythene or polyethylene sheet is commonly used as a damp proof membrane with oversite concrete for all but severe conditions of dampness. The sheet is supplied in rolls 4 m wide by 25 m long.