Construction technology of colored pervious concrete

The acceleration of urbanization makes urban water resources increasingly scarce, and urban drainage system is also facing increasing pressure. In order to solve this problem, colored pervious concrete, as a new type of green building material, came into being. Colored pervious concrete can not only effectively permeate rainwater into the groundwater layer, but also reduce the burden of urban drainage system and realize the sustainable utilization of urban water resources. This paper will introduce the construction technology of colored pervious concrete to help readers understand the construction methods and precautions of colored pervious concrete.

material preparation

Materials such as cement, sand, aggregate, dye, water and concrete additives are needed to make colored permeable concrete. Cement, sand and aggregate are the main components of concrete, dyes are used to color concrete, and additives can improve the performance of concrete. Before construction, the above materials need to be prepared and mixed according to the ratio requirements.

construction sequence

Step 1: Basic treatment

Before construction, foundation treatment must be carried out on the construction site. First of all, clean up the site and remove impurities and dust on the surface. Then the ground needs to be leveled to ensure that the ground flatness meets the requirements. If the ground is uneven, it needs to be polished or filled in.

Step 2: concrete pouring

Concrete pouring is the key step of colored pervious concrete construction. Before concrete pouring, the concrete must be mixed evenly and dyed according to the design requirements. Then concrete is poured at the construction site, and the concrete surface is leveled with a trowel. When leveling the concrete surface, be careful not to over-level, so as not to affect the water permeability of concrete.

Step 3: Draw a line.

After concrete pouring is completed, it is necessary to draw a line on the concrete surface. The purpose of marking is to increase the friction of concrete surface and prevent people and vehicles from slipping in rainy days. When marking, a professional marking machine is needed to carve different patterns and lines on the concrete surface according to the design requirements.

Step 4: Maintenance

After the concrete construction is completed, it needs to be cured. The purpose of curing is to fully harden the concrete and ensure the water permeability of the concrete. During curing, it is necessary to spray water on the concrete surface to keep the concrete surface moist. During the curing period, care should be taken not to walk or park vehicles on the concrete surface to avoid damaging the concrete.

Matters needing attention

1. Built environment

The construction of colored permeable concrete needs to be carried out in dry, windless and rainless weather. Don't have dust, dirt and other sundries near the construction site, so as not to affect the quality of concrete.

2. Concrete mix proportion

The proportion of colored pervious concrete needs to be carried out according to the design requirements, and different proportions will affect the strength and permeability of concrete. Before concrete construction, the mixture ratio of concrete must be fully debugged and tested to ensure the quality of concrete meets the requirements.

3. Concrete surface treatment

The surface treatment of colored pervious concrete needs to be careful not to be excessively smooth or scratched. Excessive screeding will affect the permeability of concrete, and excessive scratching will affect the smoothness and beauty of concrete surface.