o Commercial and residential parking lots
o Pavements, bike and pedestrian pathways
o Swimming pool decks
o Pavement edge drains and gutters
Advantages of Hydromedia®
o Can form part of a cost-effective Sustainable Urban Drainage System (SUDS)
o Can eliminate the need for detention ponds
o Offers space saving for more efficient land development
o Mitigates surface pollutants
o A more robust wearing surface
o Faster draining
o Smooth, clean look
o Ease of placement due to higher fluidity
o Low compaction requirements
o Unit weight is up to 30% less than conventional concrete
o Workable for up to 90 minutes
o Flexural strength of 200-400 psi
o Slump approximately 6 inches
o Void content: Minimum 20%
o Permeability: 4 to 60 gal/min/ft²
o Typical nominal maximum aggregate size: 0.5in (may vary according to regional
Reduces glare from wet pavements
Eliminates water accumulation from heavy rain
The standard rules for good concrete practice and placing must be strictly
observed. The use of safety goggles, hard hat, ear defenders and gloves is
recommended when placing concrete.
Eyes: Immediately flush eyes, including under lids, with water for at least 15 minutes to remove all particles. If necessary, seek medical advice.
Skin: Wash skin with cold water and a pH neutral soap as soon as possible, except where open wounds are visible. Attention should be paid to wounds and fresh scars which should be covered with protective paraffin gauze. Seek medical help in cases of prolonged contact with wet concrete.
Ingestion: Rinse mouth with clean water. If swallowing has occurred, drink plenty of milk or water. Do not induce vomiting. Seek medical attention immediately.
Inhalation: Move to fresh air. If symptoms persist, seek medical attention.
There are two factors that determine pavement system design thickness:
1. Hydraulic properties such as permeability (related to yearly average rainfall) and volume voids (related to water storage)
2. Structural properties such as flexural strength offering better loadbearing properties Selection of appropriate Hydromedia® properties is dependent on the more dominant between:
o Hydrological requirements
o Load-bearing requirements
The value of higher importance to the owner/designer governs design thickness.
Subgrade and Subbase Preparation
o Uniform (level) subgrade support
o Compact subgrade to 90-95% of theoretical density
o Increasing compaction decreases permeability
o Stable subbase required, crushed aggregates recommended
o Before starting a project, consult a geotechnical engineer for more information
o Retention of concrete workability is 90 minutes
o Rapid drying conditions require special handling and curing
o Concrete can be placed either by chute or conveyor, not by pump