Demorock® crushed concrete is suitable for use at a wide range of earthworks sites, such as road and roadway construction, parking lots, storage fields and railway yards. If needed, you can have Demorock® crushed concrete produced by Purkupiha that meets quality and environmental technology requirements delivered directly to your construction site.
Demorock® aggregate is crushed concrete intended for earthworks that is produced from the concrete obtained from the demolition of buildings. Deconstruction and the proper crushing technique ensure that no unsuitable materials are mixed up with the concrete.
Demorock® aggregate is available as Demorock® 0/90 and Demorock® 0/45 products. The products are CE marked in accordance with the harmonised product standard SFS-EN 13242.
Demorock® aggregate is suitable for earthworks with regard to its construction and environmental technology characteristics. This is ensured through quality control of the production of crushed concrete. To support quality control, the company has prepared an internal quality management manual that covers the entire production chain of crushed concrete.
Annually, we produce around 120,000 tonnes of usable Demorock® crushed concrete at our demolition sites nationwide. The production, quality control and sales of Demorock® crushed concrete are part of our ISO9001:2015 and ISO14001:2015 quality and environmentally certified operating system.
Crushed concrete is suitable for numerous construction projects
The Government Decree on the Recovery of Certain Wastes in Earth Construction makes it easy to utilise Demorock® crushed concrete. According to the Government Decree, Demorock® crushed concrete can be used in the following earth construction projects:
- Public roads, streets, bicycle paths and sidewalks as well as areas directly associated with them that are necessary for road maintenance or traffic, excluding noise barriers
- Parking lots
- Sports fields as well as routes of recreational and sports areas
- Railway yards as well as storage fields and roads of industrial, waste treatment and air traffic areas
If necessary, we will handle your permits and notifications at the ELY Centre and transport the product to your construction site.
Demorock® aggregate is available as Demorock® 0/90 and Demorock® 0/45 products. The products are CE marked in accordance with the harmonised product standard SFS-EN 13242.
Technical characteristics and quality requirements
Basic characteristics of Demorock® aggregates
| Characteristic | Demorock® 0/45 | Demorock® 0/90 |
| Particle size (mm) | 0/45 | 0/90 |
| Fines content | f7 | f7 |
| Frost susceptibility | frost-resistant | frost-resistant |
| E mod (MPa) | 700 | 700 |
| Solid density (Mg/m3) | 2.3–2.6 | 2.3–2.6 |
| Shock resistance (LA coefficient) | LA40 | LA40 |
Environmental technology quality requirements
The environmental acceptability of Demorock® aggregate is verified in accordance with the Government Decree on the Recovery of Certain Wastes in Earth Construction 843/2017.
Total content of harmful substances
| Harmful substance | Limit value [mg/kg] |
| PCB | 1 |
| PAH 20 | 20 |
| Mineral oils (C10–C40) | 500 |
| Harmful substance | Limit value, roadway, covered structure [mg/kg] | Limit value, roadway, paved structure [mg/kg] | Limit value, field, covered structure [mg/kg] | Limit value, field, paved structure [mg/kg] | Limit value, foundation structure of industrial and storage building [mg/kg] |
| Dissolved organic carbon (DOC) | 500 | 500 | 500 | 500 | 500 |
| Antimony (Sb) | 0.7 | 0.7 | 0.3 | 0.7 | 0.7 |
| Arsenic (As) | 1 | 2 | 0.5 | 1.5 | 2 |
| Barium (Ba) | 40 | 100 | 20 | 60 | 100 |
| Cadmium (Cd) | 0.04 | 0.06 | 0.04 | 0.06 | 0.06 |
| Chromium (Cr) | 2 | 10 | 0.5 | 5 | 10 |
| Copper (Cu) | 10 | 10 | 2 | 10 | 10 |
| Mercury (Hg) | 0.03 | 0.03 | 0.01 | 0.03 | 0.03 |
| Lead (Pb) | 0.5 | 2 | 0.5 | 2 | 2 |
| Molybdenum (Mo) | 1.5 | 6 | 0.5 | 6 | 6 |
| Nickel (Ni) | 2 | 2 | 0.4 | 1.2 | 1.2 |
| Vanadium (V) | 2 | 3 | 2 | 3 | 3 |
| Zinc (Zn) | 15 | 15 | 4 | 12 | 15 |
| Selenium (Se) | 1 | 1 | 0.4 | 1 | 1 |
| Fluoride (F-) | 50 | 150 | 10 | 50 | 150 |
| Sulphate (SO42-) | 5,900 | 18,000 | 1,200 | 10,000 | 18,000 |
| Chloride (Cl-) | 3,200 | 11,000 | 800 | 2,400 | 11,000 |
Granularity of Demorock® 0/45 aggregate compared to requirements in accordance with InfraRYL (general quality requirements of infraconstruction)
