Quick Answer: How To Make Porous Concrete?

What is porous concrete made of?

Pervious concrete consists of cement, coarse aggregate (size should be 9.5 mm to 12.5 mm) and water with little to no fine aggregates. The addition of a small amount of sand will increase the strength. The mixture has a water-to-cement ratio of 0.28 to 0.40 with a void content of 15 to 25 percent.

Is there a porous concrete?

Porous concrete consists of a mix including Portland cement, uniform open-graded coarse aggregate, and water. The void space of porous concrete ranges between 15% and 22%, compared to a three to five percent void space in conventional concrete. The concrete itself provides for some pretreatment of runoff.

How much does porous concrete cost?

Construction cost: $2 to $6.50 per square foot for porous concrete, 50 cents to $1 for porous asphalt and $5 to $10 for interlocking pavers Page 4 4 • Longevity: 20 to 30 years for porous concrete, 15 to 20 years for porous asphalt and 20 to 30 years for interlocking pavers.

Is concrete waterproof?

Concrete is not waterproof. Despite not immediately seeing water leak through a slab of concrete, water does get through the spaces in between its particles. And water can break the concrete down eventually, causing it to chip off or leak through and allowing more water to cause more damage.

How do you increase the strength of pervious concrete?

Apart from Cement and Aggregate admixtures such as Nano-Silica and Polypropylene are used in this project to increase the Compressive strength and abrasion strength of pervious concrete. Nano silica is added in 5% to 15% weight of cement particles.

Which material can be replaced in concrete for a strong pervious concrete pavement?

As in traditional concreting, portland cements (ASTM C 150, C 1157) and blended cements (ASTM C 595, C 1157) may be used in pervious concrete. In addition, supplementary cementitious materials (SCMs) such as fly ash, pozzolans (ASTM C 618), and ground-granulated blast furnace slag (ASTM C 989) may be used.

How strong is pervious concrete?

In the laboratory, pervious concrete mixtures have been found to develop compressive strengths in the range of 500 to 4000 psi (3.5 MPa to 28 MPa), which is suitable for a wide range of applications. Typical values are about 2500 psi (17 MPa).

How does Porous asphalt work?

How Does Porous Asphalt Pavement Work? Porous asphalt allows water to drain through the asphalt and into the stone bed below. It then works its way into the soil as nature intended. The size and depth of the stone bed must be designed so that the water level never rises into the asphalt.

Is a concrete driveway permeable?

Permeable or Porous Hard surfaces



There is a wide range of permeable surfaces that allow the water to pass through while still providing a sound hard surface for driving and parking on. Porous asphalt, concrete and block paving either allow the water through the material or around the edges of the blocks.

How long does permeable concrete last?

Pervious concrete is a strong and highly durable material. Parking areas properly designed and constructed will last 20-40 years with little or no maintenance.

Does pervious concrete clog?

Permeable concrete (or “pervious concrete” in North America) is used to reduce local flooding in urban areas and is an important sustainable urban drainage system. However, permeable concrete exhibits reduction in permeability due to clogging by particulates, which severely limits service life.

Is concrete pervious?

Essentially, pervious concrete is a structural concrete pavement with a large volume (15 to 35 percent) of interconnected voids. Like conventional concrete, its made from a mixture of cement, coarse aggregates, and water. The network of voids gives the concrete its characteristic honeycomb texture.