Water-permeable pavement with purifying function

A technology of permeable pavement and function, which is applied to the coagulation pavement, roads, roads and other directions paved on site, can solve the problems of general digestion effect of permeable pavement, and achieve the effect of good thermal insulation performance, good living environment and high road surface smoothness.

Active Publication Date: 2017-03-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, urban rainwater contains many pollutants such as TP, TN, SS, and CO

Method used

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  • Water-permeable pavement with purifying function

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[0026] Please refer to figure 1 As shown, the permeable pavement with purification function of the present invention includes, from top to bottom, a permeable concrete surface layer 1, a non-woven geotextile layer 2, a permeable foam concrete base layer 3 with a water collection and drainage pipe 31, a cement lime stabilized soil base layer, and The original soil road base.

[0027] The pouring thickness of the permeable concrete surface layer 1 is 180-200mm, and aggregates with a particle size of 4.75-9.5mm are selected. The resulting concrete has a connected porosity of 16%-20% and a water permeability coefficient of at least 1.5mm / s. The compressive strength is not less than 20MPa.

[0028] The pouring thickness of the permeable foamed concrete base layer 3 is 180-220mm. The permeable foamed concrete refers to the slurry formed by introducing foam into the mixture of cement, fine sand and water. The initial fluidity is 165-175mm. Connected pores are gradually formed during the...

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Abstract

The invention discloses a water-permeable pavement with a purifying function. The water-permeable pavement comprises a water-permeable concrete surface course, a nonwoven geotextile course, a water-permeable foam concrete base course, a cement-lime stabilized soil base course and an original dirt road base course from top to bottom in sequence, wherein water collecting and draining pipes are arranged in the water-permeable foam concrete base course. According to the water-permeable pavement, a traditional gravel course is replaced by water-permeable foam concrete, nonwoven geotextile is laid between the water-permeable foam concrete base course and the water-permeable concrete surface course, and the nonwoven geotextile not only has favorable water permeability, but also can block solid pollutants in rainwater, maintain the load-carrying property of the overall structure and effectively prevent the development of reflection cracks; the water-permeable foam concrete can filter out fine solid pollutants in rainwater, and the acidic environment in the water-permeable foam concrete can enrich various microbes to purify organic pollutants in rainwater; and the water-permeable foam concrete also has a favorable thermal-insulation property, and can protect the pavement structure at lower temperature and provide a favorable living environment for the microbes.

Description

[0001] Technical field: [0002] The invention relates to a water-permeable road surface, in particular to a water-permeable road surface with purification function, which belongs to the technical field of road engineering. [0003] Background technique: [0004] The closed hard paving used in urban construction has brought a series of problems that affect the ecological environment and urban development, such as: the intensification of the urban heat island effect, the lack of urban water resources, and urban waterlogging. In addition, how to protect regional water resources and groundwater levels has gradually become a common concern worldwide. Therefore, my country has vigorously promoted the construction of "sponge cities" in the past two years, and the importance of permeable pavements has become more and more obvious. Rainwater is a very good resource for cities. During the rainfall process, rainwater can penetrate below the surface layer through specific pavement structu...

Claims

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Application Information

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IPC IPC(8): E01C7/14E01C11/22C04B28/06C04B38/10
CPCC04B28/06C04B2111/00284C04B2111/0075E01C7/14E01C7/142E01C11/226C04B14/068C04B38/10
Inventor 耿飞周利睿解建光桂敬能贾思成吴成浩季天剑
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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