Prepared as a stand‑alone briefing paper 1. Executive Summary Polytrack G+ Un‑blocked is a next‑generation synthetic racetrack surface that combines a proprietary polymer‑bound aggregate with a high‑performance drainage system. Designed for horse‑racing, athletics, and multi‑sport venues, the “un‑blocked” formulation eliminates the traditional block‑type installation method, allowing the surface to be poured in‑situ as a continuous slab. This paper reviews the composition, engineering principles, performance characteristics, safety and environmental considerations, market positioning, and future development pathways for Polytrack G+ Un‑blocked. 2. Introduction | Aspect | Detail | |--------|--------| | Product name | Polytrack G+ Un‑blocked (often abbreviated as Polytrack G+) | | Manufacturer | Polytrack International Ltd. (a division of Mares Sport Surfaces , UK) | | Primary applications | Thoroughbred and harness racing tracks, athletics (track & field), training arenas, and mixed‑use sport complexes | | Key selling point | A monolithic, “un‑blocked” installation that eliminates seams, reduces maintenance, and improves surface consistency across the whole footprint | | Release | Commercial launch in 2022, with subsequent roll‑out in Europe, North America, Australia, and the Middle East | 3. Technical Foundations 3.1 Composition | Component | Typical proportion (by weight) | Function | |-----------|------------------------------|----------| | Silica sand (graded) | 45–55 % | Provides skeletal structure, load‑bearing capacity | | Rubber granules (recycled tire crumb) | 15–20 % | Energy‑absorbing matrix, contributes to shock absorption | | Synthetic fibers (polypropylene/ polyester) | 5–10 % | Stabilises the aggregate, reduces migration | | Polymer binder (high‑density epoxy‑based) | 8–12 % | Bonds all particles into a durable, waterproof matrix | | Silica fume / micro‑silica | 2–4 % | Increases density and reduces porosity | | Additives (UV‑stabiliser, anti‑fungal agents) | ≤1 % | Extends lifespan, prevents biological growth |