To mix resin gravel effectively, you follow a specific sequence of adding aggregates and pre-mixed resin into a specialized mixer, typically a forced action mixer. This process ensures the aggregates are thoroughly coated with the resin for a strong, durable surface.
Understanding Resin Gravel Mixing Fundamentals
Mixing resin gravel, often used in resin-bound or resin-bonded surfacing, is a precise operation designed to fully encapsulate each aggregate particle with resin. This crucial step directly impacts the strength, permeability, and longevity of the final surface. The choice of equipment, particularly a forced action mixer, is vital as it provides the intensive mixing action needed to achieve proper coating.
Step-by-Step Process for Mixing Resin Gravel
The mixing process involves adding different aggregate sizes and the pre-mixed resin in a specific order to ensure optimal distribution and adhesion. This procedure is performed using a forced action mixer.
Here are the exact steps for mixing resin aggregates:
- Initial Aggregate Placement: Begin by loading the first 25kg bag of 2-5mm aggregates into the forced action mixer. Simultaneously, add the bag of 1-3mm aggregates to this initial batch.
- Resin Introduction: Immediately after the initial aggregates are in the mixer, add the pre-mixed resin. This ensures the resin is introduced to a foundational layer of aggregates.
- Final Aggregate Addition: Complete the aggregate loading by adding the remaining two bags of 2-5mm aggregates into the mixer.
This structured approach, as outlined by expert guidelines, is essential for achieving a uniform mix where every aggregate particle is evenly coated with the resin, forming a robust and permeable matrix.
Source: Resin Bonded Aggregates Knowledge Centre
Key Components and Sequence Summary
For clarity, the following table summarizes the components and their respective addition sequence during the resin gravel mixing process:
| Step | Component | Quantity/Description | Mixer Stage |
|---|---|---|---|
| 1 | 2-5mm Aggregates | First 25kg bag | Initial Loading |
| 1 | 1-3mm Aggregates | One bag | Initial Loading |
| 2 | Pre-mixed Resin | (Pre-prepared quantity) | After Initial Aggregates |
| 3 | 2-5mm Aggregates | Two additional bags | Final Aggregate Addition |
Essential Equipment for Mixing
The most critical piece of equipment for mixing resin gravel is a forced action mixer. Unlike traditional drum mixers, a forced action mixer has paddles or arms that actively push and fold the materials, ensuring a thorough and consistent blend of the resin with the aggregates. This is imperative for achieving the necessary bond and overall quality of the resin-bound system.
