A permeable pavement with purification function
A permeable pavement and functional technology, which is applied to coagulation pavement paved on site, roads, roads, etc., can solve the problems of general digestion effect of permeable pavement, achieve good thermal insulation performance, prevent the development of reflective cracks, and have high road surface smoothness Effect
Active Publication Date: 2020-02-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
In addition, urban rainwater contains many pollutants such as TP, TN, SS, and COD, and the traditional permeable pavement has a general effect on its digestion.
Method used
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[0021] Please refer to figure 1 As shown, the permeable pavement with purification function of the present invention includes 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.
[0022] 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 connected porosity of the concrete made is 16%-20%, and the water permeability coefficient reaches at least 1.5mm / s. The compressive strength is not less than 20MPa.
[0023] The pouring thickness of the permeable foam concrete base 3 is 180-220 mm. The permeable foam concrete refers to the slurry formed by introducing foam into the mixture of cement, fine sand and water. The initial fluidity is 165-175 mm. Connected pores are gradually formed during the hardening process of...
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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
Technical field: [0001] 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. Background technique: [0002] 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 structures. Part of th...
Claims
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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