Polymeric sand works by creating a strong, interlocking bond between paving stones, bricks, or other hardscaping materials thanks to a binding agent that is activated by water. This prevents erosion, weed growth, and insect infestation far more effectively than traditional jointing sand.
Here's a breakdown of the process:
- Composition: Polymeric sand is a mixture of fine sand, polymers, and other additives. The polymers are the key ingredient.
- Application: The sand is swept into the joints between pavers, ensuring it fills the gaps completely.
- Compaction: The sand is compacted using a hand tamper or plate compactor to ensure it's tightly packed within the joints.
- Water Activation: Water is applied to the sand, which activates the polymers.
- Bonding Process: As the water penetrates the sand, it dissolves the polymers. These dissolved polymers then flow and coat the sand particles.
- Hardening: As the water evaporates, the polymers harden, creating a strong, flexible bond between the sand particles and the adjacent pavers. This hardened bond resists washing out from rain, wind, or cleaning.
Benefits of Using Polymeric Sand:
- Erosion Resistance: The binding agent creates a strong, cohesive joint that resists erosion caused by rain, wind, and foot traffic.
- Weed Prevention: The hardened surface prevents weed seeds from germinating in the joints.
- Insect Deterrent: It discourages insects from nesting between the pavers.
- Durability: It provides long-lasting stability and reduces the need for frequent maintenance.
- Aesthetic Appeal: It maintains a clean and uniform appearance.
Key Differences from Regular Sand:
| Feature | Polymeric Sand | Regular Sand |
|---|---|---|
| Binding Agent | Polymers | None |
| Erosion Resistance | High | Low |
| Weed Prevention | Good | Poor |
| Durability | High | Low |
| Cost | Higher | Lower |
In summary, polymeric sand's effectiveness lies in its polymer-based binding agent, which, when activated by water, creates a durable and resilient bond that stabilizes paving stone joints, preventing erosion and inhibiting weed growth.
