Commentaire
Composite sound barrier wall panels have been successfully produced and installed for decades without the need for wet curing. The recent change in Clause 760.05.07, referencing the new OPSS 1355 requirement, introduces a mandatory wet cure process that is not compatible with these products.
Sound absorptive panels are inherently porous. Applying a wet cure to such materials causes water to accumulate within the surface pores and migrate through the panel, resulting in dripping and the removal of fresh cement paste from the absorptive layer. This will most likely compromise the acoustic performance and durability of the product.
If this wet curing requirement is enforced, the production of sound absorptive composite barrier walls for Ministry projects will no longer be feasible or practical. We therefore request that an exemption be maintained for these elements or that curing of these elements be completed as per CSA A23.4 as has been done for the last several decades.
Submitted 22 October 2025 4:55 PM
Comment on
OPSS 760 – Spécification technique pour les systèmes de barrières antibruits
PCT Numéro
000-0265
Comment ID
492
Commenting on behalf of
Comment status