Product Conformity Note
Please note that whilst every care is taken to provide an exact indication of the appearance of our products; aggregates are naturally found minerals which are subject to changes in colour, shape and size. It is therefore strongly recommended to request a product sample prior to undertaking any project.
Suitability Note – Rust Staining (RIS)
Some of the gravel and shingles we supply may occasionally contain minor concentrates of iron minerals which occur naturally within the deposits, and which upon weathering may result in areas of rust staining. The natural occurrence of these iron minerals cannot be controlled or eliminated and as such we cannot be held responsible for any loss or damage suffered as a result of rust staining. By way of guidance to users of our products, particularly when used for external render or resin surfacing, we have included the risk of iron staining (RIS) assessment on our range of gravels and shingles. This guide is purely a subjective assessment, based on our own experience with these products and may be subject to change as our database expands. The scale is defined as follows:
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= | No likelihood of any rust staining |
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= | No previous recorded instances of rust staining within this product |
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= | Potential for rust staining within this rock type with recorded instances. |
Dashing Aggregates |
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= | Within our dashing range, we have indicated which products are iron free. |
Resin Bound & Bonded Surfacing – Performance Scale
Our extensive product selection offers a vast choice of colours, sizes, textures and decorative finishes for the resin bound & bonded surfacing industry. However as these two resin systems are distinctly different, it is important to understand the part aggregates play in ensuring the suitability and overall life expectancy of the finished surface. To provide a guide as to the aggregates suitability within either system, but more specifically within a bonded system, we have included a number index rating between 1 and 5 for all of our products.
This scale is defined as follows:
| 1 | = | Recommended for use only within bound systems, for foot traffic use. |
| 2 | = | Recommended for use within all bound systems and bonded systems primarily for foot trafficked areas or areas of occasional domestic, car traffic |
| 3 | = | Recommended for use within all bound systems and bonded systems subjected to a medium degree of vehicular traffic, including vans but not heavy goods |
| 4 | = | Recommended for use within all bound systems and bonded systems subjected to heavy wear from continual vehicular traffic including vans but not heavy goods |
| 5 | = | Recommended for use within all bound systems and bonded systems subject to heavy wear from all forms of transport including heavy goods. |
Terminology Explained
| PSV | = | Polished Stone Value is the resistance of an aggregate to polishing and is therefore a measure of skid resistance. PSV should not be viewed in isolation as aggregates with a high PSV may be likely to abrade easily (high AAV. Values in excess of 58 are generally acceptable for highway wearing courses. |
| AAV | = | Aggregate Abrasion Value is the resistance of an aggregate to abrasion. The lower the AAV, the more resistant the aggregate is to wearing. Values of less than 16 are acceptable for highway wearing courses. |
| AIV | = | Aggregate Impact Value is the resistance of an aggregate to impact stress produced from a moving vehicle. Values of less than 20 are acceptable for highway wearing courses. |
| ACV | = | Aggregate Crushing Value is the resistance of an aggregate to crushing. The lower the ACV, the more resistant the aggregate is to crushing. |
| LA | = | Los Angeles resistance to fragmentation is a measure of the strength of an aggregate and is viewed as a representative measure of both impact and crushing stress values. Values of less than 30 are acceptable for highway wearing courses. |