Marshalls Priora Sub-Base Aggregate has been carefully selected for its superior void ratio and maximum internal angle of friction to ensure optimal performance of your permeable pavement both structurally and hydraulically.
The internal angle of friction has been thoroughly tested to ensure that it exceeds the BS and offers maximum interlock between particles. The aggregate has been graded to provide a void ratio of at least 32% (and up to 40%).
In addition, because our aggregate is supplied by a network of nationally sourced quarries, you can reduce the carbon footprint of your job by using the most local source possible for your aggregate.
Courtesy of our national network and market-leading buying power, we can offer this superior specification product to our customers for a lower rate than most ungraded alternatives.
- Superior void ratio of up to 40%
- Internal angle of friction delivers maximum interlock between particles
- Enhances the structural and hydraulic performance of permeable paving
- 6mm laying course/jointing aggregate and 20mm sub-base aggregate both available
Ethical Risk Index
This Radar diagram illustrates the level of ethical risk associated with a specific stone. Ethical risk is plotted against the 10 ten measures of the ERI, with each value drawn from reports produced by independent ethical auditors, engaged by Marshalls to provide non-biased and honest reporting into levels of risk in that supply chain.
Each of the 10 measure is designed to recognise different and discrete sources of ethical risk. This produces a bespoke, fit for purpose framework designed specifically for the requirements of the stone industry. The radar diagram itself also compares the Marshalls supply chain to the wider industry in that stone, giving users a working comparison of Marshalls supply chain to the industry average, in the opinion of the auditor.
- Modern Slavery Act Awareness
- Supply Chain Visibility
- Income and Employment Security
- Health & Safety
- Employment Freely Chosen
- Corruption and Bribery