Permeable Concrete
In the midst of the hustle and bustle of the city and the concrete jungle, a quiet "ground revolution" is taking place. During the rainy season, problems such as urban flooding and road water accumulation often plague citizens' lives. Now, a new type of building material called "breathable" - permeable concrete - is leveraging its outstanding ecological functions, moving from sidewalks and parks to broader areas, providing innovative solutions for building "sponge cities" and improving living environments.
Say goodbye to "seeing the sea", and the pavement can "drink water"
Permeable concrete, also known as porous concrete, lies in its unique internal structure. Unlike ordinary concrete, it contains little or no fine aggregates (such as sand), and is composed of a thin layer of cement slurry covering the surface of coarse aggregates, forming a large number of uniformly distributed honeycomb-like interconnected pores. These pores are like countless tiny "straws", giving the pavement a powerful water-permeation ability.
According to relevant research, high-quality permeable concrete can have a water-permeation rate of 31-52 liters per hour per square meter, much higher than the drainage rate of regular rainfall. Take Jiang Gaogang Road in Taizhou, Jiangsu Province as an example. The permeable pavement technology it adopts has a water infiltration coefficient of up to 5165 milliliters per minute, equivalent to being able to "drink" 10 500-milliliter bottles of mineral water per minute. The water infiltration capacity is more than ten times that of traditional asphalt pavement. This means that even sudden heavy rain can quickly penetrate the pavement into the ground, effectively alleviating the pressure on the city's drainage system and saying goodbye to the embarrassing situation of "seeing the sea during rain".
Ecological benefits far exceed expectations
The value of permeable concrete goes far beyond drainage. Its ecological benefits are multi-faceted and are reshaping the relationship between cities and nature.
- Replenishing groundwater and maintaining ecological balance:
Rainwater seeps directly through the permeable pavement, effectively replenishing groundwater resources and maintaining the stability of the groundwater level. This is of great significance for alleviating the problem of excessive groundwater extraction in some areas.
- Mitigating the heat island effect and lowering surface temperature:
Its porous structure reduces the material's heat storage capacity, and the unique pores can conduct lower underground temperatures to the surface. Studies have shown that pavement using permeable concrete can have a summer surface temperature 5-12°C lower than traditional pavement, effectively alleviating the urban heat island effect and providing citizens with a more comfortable walking experience.
- Noise reduction and anti-slip, enhancing travel safety:
The porous structure can absorb the noise generated by vehicle movement, typically reducing by 3-5 decibels. At the same time, its surface is rough and has good anti-slip properties, ensuring the safety of pedestrians and vehicles even in rainy weather.
- Purifying water quality and improving the environment:
During the infiltration process, the pore structure of permeable concrete can filter out some impurities and pollutants in the rainwater, helping to improve the quality of infiltrating rainwater.
Transforming waste into resources, technology empowering green recycling
The green development path of permeable concrete not only lies in its ecological benefits during use, but also in the innovation of its raw material sources. More and more enterprises and research institutions are beginning to explore the use of solid waste resources such as construction waste, forestry waste, and steel slag to prepare permeable concrete, achieving the "transforming waste into resources" circular economy model.
Post time: Apr-20-2026
