Concrete which allows water to drain through pavement

Hygea can help you balance the need for site pavement with the desire to allow water to return naturally into the earth.

Hygea is a union of pervious concrete, containing a mix of coarse stone, cement, water and specialty admixtures, with an engineered base layer that acts as a reservoir, allowing rain water to gradually return into local aquifers.

Common Uses

  • Parking lots
  • Pathways & Pavement Systems
  • Driveways
  • Subdivision streets
  • Golf-cart paths

Lower Installation Costs

According to the Center for Watershed Protection, installing traditional curbs, gutters, storm drain inlets, piping, and retention basins can cost two to three times more than low-impact strategies for handling water runoff, such as pervious concrete. Projects that use pervious concrete typically don’t need storm sewer ties-ins, which eliminates the cost of installing underground piping and storm drains. Grading requirements for the pavement are also reduced because there is no need to slope the parking area to storm drains.

Increased Land Utilization

Because a pervious concrete pavement doubles as a stormwater management system, there is no need to purchase additional land for installing large retention ponds and other water-retention and filtering systems. That means developers and property owners can use land more efficiently and maximize the return on their investment.

Durable Alternative

The Hygea pavement system is also a durable alternative to other parking options. When properly designed, using the Hygea mix designer, and constructed, the pavement will last 20-40 years with little or no maintenance.

Using Hygea concrete paving in your parking lot can reduce the need for large detention ponds, since the pavement layer and base layer reservoir as the detention area. Use SurfaceTech’s cost to build comparison to learn how the Hygea pavement system compares with the cost of other development options.

Environmental Benefits. Stormwater Control.

Stormwater runoff is a leading source of the pollutants entering our waterways. According to the U.S. Environmental Protection Agency, about 90 percent of surface pollutants are carried by the first 1-1/2 inch of rainfall. Stormwater drains don’t typically channel this polluted runoff to treatment facilities, but instead convey it directly into local water bodies. This can increase algae content, harm aquatic life, and require expensive treatments to make the water potable.

According to Youngs, the big three pollutants in urban runoff are sediment (dirt and debris), heavy metals (from the brake linings of cars), and hydrocarbons. One source of hydrocarbons is the oil that drips onto pavements from vehicles. But the primary contributor is asphalt. Studies have shown that 90 to 95 percent of the hydrocarbons in urban runoff is from the binder and sealer used for asphalt pavements, he says.

To address these serious pollution concerns, the EPA and many local municipalities and regional watershed authorities are tightening environmental regulations and requiring more stringent stormwater management practices. Pervious concrete is becoming one of the most viable solutions.

Here are some of the reasons why. A pervious concrete pavement can:

  • Reduce the amount of untreated runoff discharging into storm sewers.
  • Directly recharge groundwater to maintain aquifer levels.
  • Channel more water to tree roots and landscaping, so there is less need for irrigation.
  • Mitigate pollutants that can contaminate watersheds and harm sensitive ecosystems.
  • Eliminate hydrocarbon pollution from asphalt pavements and sealers.

In addition to stormwater control, pervious concrete pavements aid in reducing the urban heat-island effect. Because they are light in color and have an open-cell structure, pervious concrete pavements don’t absorb and store heat and then radiate it back into the environment like a typical asphalt surface. The open void structure of the pervious pavement also allows cooler earth temperatures from below to cool the pavement.

The lighter color of concrete is also beneficial from an energy-savings standpoint. Because the concrete is reflective, the need for lighting at night is reduced.

Beyond helping the environment, pervious concrete pavements are also safer for drivers and pedestrians. Because pervious concrete absorbs water rather than allowing it to puddle, it reduces hydroplaning and tire spray. In California, parks are installing pervious concrete pathways to provide disability access for people in wheelchairs.

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