Changning District

Porous concrete

1. Definition

Ecological permeable concrete, also known as drainage concrete, is a new type of eco-friendly ground paving material made by blending small gravel, high-grade concrete, water-permeable additives, water, color-enhancing agents, and stabilizers in a specific ratio. It is formed by coarse aggregates bonded together with a thin paste, creating a honeycomb structure that allows rainwater to seep into the ground, effectively replenishing groundwater. It also effectively eliminates the environmental hazards posed by pollutants like oil compounds on the ground. With vibrant colors and a harmonious blend of landscapes, it contributes to a more cohesive urban environment, protecting nature, maintaining ecological balance, and mitigating the urban heat island effect.

2. Permeable Concrete Construction Process

1. Mixing: Blend cement and aggregates in a mixer according to the specified proportions to achieve a well-mixed material.

2. Pouring: Prior to pouring, the subgrade must be moistened with water. Otherwise, rapid water loss from the permeable concrete will reduce the bonding strength between aggregates. Simply lay the material flat on the subgrade.

3. Vibrating: Avoid vigorous vibration and compaction during the pouring process.

4. Rolling: After vibration, further compaction should be achieved using solid steel pipes or light roller compactors to flatten and permeate the concrete mixing material.

5. Maintenance: Due to its numerous pores, permeable concrete is prone to water loss and dries quickly, thus requiring film covering for maintenance.

6. Product: The wet curing time for the film-coated permeable concrete should be no less than 7 days, followed by applying a layer of specialized permeable concrete sealant.