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Pervious Concrete Installation Process Step 4: Curing
The final installation step is the protection of the pavement by curing. This is essential because the open pore structure and faceted surface of pervious concrete create a high potential for evaporation. Moisture is vital because it acts as the catalyst for the cement’s chemical reactions, which produce the concrete’s strength. The purpose of the curing procedure is to allow the concrete to gradually harden over an extended period of time, building up its maximum strength capacity through steady, controlled evaporation. Curing should begin as soon as possible after the placement, compaction, and jointing of the pavement. The process involves first fog-misting the concrete with a curing compound, and then covering it with plastic sheeting for a minimum of seven days. This maintains the pavement’s moisture, allowing it to induce hardening for an extended period of time.
Once the curing process is complete, pervious concrete can function well with minimal maintenance. Due to its considerable strength and durability, it requires fewer repairs than most other building materials, such as asphalt. In order to prevent the void structure from becoming clogged with debris, it may be necessary to regularly vacuum or pressure-wash the pavement. The latter method has been shown to restore as much as 80-90% of the concrete’s original permeability.
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