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Canadian Concrete Pipe and Precast Association CCPPA

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Canadian Concrete Pipe & Precast Association

Ontario Concrete Pipe Association


		Just The Facts - Concrete Pipe vs. HDPE A recent NCHRP Study indicated stress cracks and liner tears occur in HDPE pipe with time. The cracks generally occur at the junction where the liner is welded to the outer corrugations. The main cause of the cracks is a combination of residual stresses built into the pipe from the manufacturing process and stresses induced by poor installation and changing soil conditions. This research has shown that the lack of stress crack resistance of the polyethylene resin used to manufacture HDPE pipe leads to this long term problem. The raw materials used to manufacture HDPE pipe can be tested for Environmental Stress Crack Resistance (ESCR), but many HDPE pipe manufacturers do not choose to do so. There is no established method of repairing a torn or cracked HDPE pipe. Click here or on the booklet cover to download a copy.

		Just The Facts - Concrete Pipe vs. CSP In considering the durability of corrugated steel pipe, the designer must address the corrosive and abrasive potential of the installation. Abrasion is a result of prolonged exposure to coarse materials passing over the metal surface. Eventually, the abrasion leads to the removal of the protective coatings, thereby permitting corrosion to occur. Corrosion of metal is defined as an electro-chemical process, initiated on the surface of the pipe, and propagates through the movement of electrical currents causing metal ions to go into solution. This results in a loss of metallic material from the pipe. Abrasion and corrosion must be considered during the design phase as these characteristics present severe limitations to the service life of corrugated metal pipe. Click here or on the booklet cover to download a copy.

American Concrete Pipe Association

		Underground Storm Water Detention & Retention Systems Underground storm water detention and retention systems are popular items on construction sites. Regardless of the necessary volume, the structural strength requirements, or the need for special fittings, precast concrete is the solution. Click here or on the booklet cover to download a copy

Canadian Concrete Pipe & Precast Association

447 Frederick St, Second Floor, Kitchener, Ontario N2H 2P4 CANADA
T: 519-489-4488 F: 519-578-6060
admin@ccppa.ca

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