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Water purification evaluation method of OGFC (open graded friction course) mixed material on rainfall and device for simulating rainfall

An evaluation method and mixture technology, which is applied in the direction of material inspection products, etc., can solve the problems that do not involve the evaluation method of OGFC mixture water purification, and achieve the effect of alleviating the shortage of water resources, easy operation and accurate evaluation

Active Publication Date: 2014-09-03
威海银通新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since urban road OGFC mixture and rainwater purification belong to two different subject areas of road materials and rainwater purification treatment, there are few researches on this aspect at home and abroad, and there is no method for evaluating the water purification of OGFC mixture on road rainfall.

Method used

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  • Water purification evaluation method of OGFC (open graded friction course) mixed material on rainfall and device for simulating rainfall
  • Water purification evaluation method of OGFC (open graded friction course) mixed material on rainfall and device for simulating rainfall
  • Water purification evaluation method of OGFC (open graded friction course) mixed material on rainfall and device for simulating rainfall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The indoor molding hot-mix OGFC-13 asphalt mixture is used. The asphalt used is Shell high-viscosity modified asphalt with a void ratio of 18%. The gradation of the OGFC-13 mixture is shown in Table 1. The pollutant indicators determined by the prepared water samples are suspended solids SS and chemical oxygen demand COD, and the pollutants come from the sweeping soil and humic acid of a certain road in Beijing urban area. The rainfall intensity is 120mm / h, which is converted into a flow rate of 10.8L / h. You can refer to the rainfall intensity table, as shown in Table 2.

[0051] Table 1: Grading of OGFC-13 mixture

[0052]

[0053] Table 2: Rainfall Intensity Table

[0054] rainfall type

Strength (mm / h)

Conversion flow(L / h)

light rainfall

60

5.4

Moderate rainfall

90

8.1

heavy rainfall

120

10.8

torrential rain

240

21.6

[0055] Such as figure 1 Shown, OGFC-13 mixture to the water p...

Embodiment 2

[0072] OGFC-13 type asphalt mixture was selected, and its gradation, source, porosity, and pollutant source used in water sample preparation were the same as those in Example 1. The rainfall intensity is 240mm / h, which is converted into a flow rate of 21.6L / h. You can refer to the rainfall intensity table, as shown in Table 2.

[0073] Such as figure 1 Shown, OGFC-13 mixture to the water purification evaluation method of road surface rainfall, it comprises the following steps according to sequence:

[0074] (1) Inject 15L of tap water into the circular water tank 3 with a cover, turn on the agitator 2, the rotation speed of the agitator 2 is 250r / min, weigh 15g of cleaning soil and 10g of humic acid and slowly pour into the water, and mix for 40s;

[0075] (2) Make length, width and height respectively 300mm, 300mm, 50mm plate-shaped test piece, put the test piece in the test piece mold 10, and place it in the center of the test piece holder 8, the test piece mold 10 has a si...

Embodiment 3

[0088] OGFC-13 type asphalt mixture was selected, and its gradation, source, porosity, and pollutant source used in water sample preparation were the same as those in Example 1. The rainfall intensity is 90mm / h, which is converted into a flow rate of 8.1L / h. You can refer to the rainfall intensity table, as shown in Table 2.

[0089] Such as figure 1 Shown, OGFC-13 mixture to the water purification evaluation method of road surface rainfall, it comprises the following steps according to sequence:

[0090] (1) Inject 20L tap water into the circular water tank 3 with a cover, turn on the agitator 2, the rotation speed of the agitator 2 is 200r / min, weigh 18g of cleaning soil and 15g of humic acid and slowly pour it into the water, and mix for 40s;

[0091] (2) Make length, width and height respectively 300mm, 300mm, 50mm plate-shaped test piece, put the test piece in the test piece mold 10, and place it in the center of the test piece holder 8, the test piece mold 10 has a side...

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Abstract

The invention discloses a water purification evaluation method of an OGFC (open graded friction course) mixed material on rainfall and a device for simulating rainfall. The evaluation method comprises: preparing a water sample, preparing an OGFC mixed material sample, controlling the rainfall process, collecting a water sample, determining the concentration of SS and COD, calculating the SS concentration and COD concentration, calculating the SS absorption rate and the COD absorption rate, and further evaluating the water purification effect. The device comprises a framework, a water tank, a flow meter and a water pipe, wherein the framework comprises a support and a sample frame; the water tank is arranged above the framework, and is internally provided with a stirrer; one end of the water pipe is connected with the water tank, and the other end of the water pipe is connected with a sprayer; the water pipe is provided with a valve and the flow meter; the sample frame is arranged on the bottom end of the framework. The water purification evaluation method provided by the invention is simple to operate, evaluates the water purification effect accurately, lays a foundation for the further utilization of rainwater, and has a great significance in relieving the water resource shortage of cities, utilizing rainwater and turning waste of rainwater into wealth.

Description

technical field [0001] The invention belongs to the technical field of rainwater treatment, and relates to a method for evaluating the purification effect of OGFC mixture on road surface runoff, in particular to a water purification evaluation method for OGFC mixture on rainfall and a device for simulating rainfall. Background technique [0002] Open Graded Friction Course (OGFC for short), also known as porous pavement or permeable pavement, usually has a high porosity (generally 18-25%), which can infiltrate the pavement rainfall into the pavement in time, The rainwater is drained through the connected pores, which can prevent thicker water film on the road surface, thereby greatly improving the safety of driving in rainy days. [0003] The runoff of urban roads mainly comes from natural precipitation, and the pollutants in runoff mainly come from road surface pollution and rainwater pollution. The characteristics of road surface pollution are mainly characterized by accu...

Claims

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Application Information

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IPC IPC(8): G01N33/42
Inventor 徐世法索智季节王晓晓陈绍坤
Owner 威海银通新材料有限公司
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