Table of Contents
- 1 What is pervious concrete made of?
- 2 Where is pervious concrete used?
- 3 Is pervious concrete more expensive?
- 4 What are the benefits of pervious concrete?
- 5 How long will concrete last?
- 6 Is concrete waterproof?
- 7 What are the benefits of permeable pavement?
- 8 Does pervious concrete crack?
- 9 Which is the best description of pervious concrete?
- 10 How much water can pass through pervious concrete?
- 11 Why are the joints cut in pervious concrete?
What is pervious concrete made of?
Pervious concrete is made from carefully controlled amounts of water and cementitious materials used to create a paste that forms a thick coating around aggregate particles. Unlike conventional concrete, the mixture contains little or no sand, creating a substantial void content – between 15 to 25 percent.
Where is pervious concrete used?
Pervious concrete is traditionally used in parking areas, areas with light traffic, residential streets, pedestrian walkways, and greenhouses. It is an important application for sustainable construction and is one of many low impact development techniques used by builders to protect water quality.
What is the meaning of pervious concrete?
Definition: concrete containing little, if any, fine aggregate that results in sufficient voids to allow air and water to pass easily from the surface to underlying layers.- ACI Concrete Terminology.
Is pervious concrete more expensive?
Over its lifetime, pervious concrete can be a much more inexpensive option than traditional concrete, even though the installation cost of pervious is typically higher than that of traditional concrete. Pervious concrete also requires less repair maintenance than some other paving options, including asphalt.
What are the benefits of pervious concrete?
Benefits of Pervious Concrete
- Eliminates untreated storm water and creates zero runoff!
- Directly recharges groundwater.
- Mitigates “first flush” pollution.
- Protects streams, watersheds, and ecosystems.
- Mimics the drainage and filtration of bioswales and natural soils.
- Reduces surface temperatures and heat island effects.
How long does permeable concrete last?
20-40 years
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.
How long will concrete last?
For large scale projects like buildings, concrete should last up to 100 years if it’s properly cared for. Concrete projects that experience more wear-and-tear like sidewalks and driveways have an expected lifespan of about half that—50 years.
Is concrete waterproof?
Good quality concrete is inherently waterproof and the addition of other mix components is unlikely to prevent leakage at these defects.
How do you keep concrete pervious?
Routine Maintenance: Should include visual inspection of the pervious pavement to ensure that it is clean of debris and sediments, and that it will dewater between storms. Routine maintenance cleaning procedures would include blowing (with leaf blower or similar equipment), truck-sweeping and/or dry vacuuming.
What are the benefits of permeable pavement?
What are the Potential Benefits of Permeable Pavement? Permeable pavements help reestablish a more natural hydrologic balance and reduce runoff volume by trapping and slowly releasing precipitation into the ground instead of allowing it to flow into storm drains and out to receiving waters as effluent.
Does pervious concrete crack?
A much smaller amount of drying shrinkage occurs in the placement of pervious concrete than dense, and it develops sooner, as well. This allows many pervious pavements to be constructed without crack-preventing control joints.
Which material can be replaced in concrete for a strong pervious concrete pavement?
Which material can be replaced in concrete for a strong pervious concrete pavement? Explanation: Apart from replacement, there are many materials that can be used for substitution, for a strong pervious concrete pavement better option is to replace coarse aggregate.
Which is the best description of pervious concrete?
Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater
How much water can pass through pervious concrete?
A typical pervious (porous) concrete pavement has a 15-25% void structure and allows 3-8 gallons of water per minute to pass through each square foot. This permeable type of concrete is made with gap-graded aggregate, which means all the pieces are similar in size.
When did pervious concrete become popular in Europe?
It became popular again in the 1920s for two storey homes in Scotland and England. It became increasingly viable in Europe after WWII due to the scarcity of cement. It did not become as popular in the US until the 1970s. In India it became popular in 2000.
Why are the joints cut in pervious concrete?
Joints in pervious concrete are tooled with a rolling jointing tool. This allows joints to be cut in a short time, and allows curing to continue uninterrupted. Proper curing is essential to the structural integrity of a pervious concrete pavement.