Design method of high-performance ultrathin asphalt wearing layer

A design method and high-performance technology, applied in computer-aided design, design optimization/simulation, calculation, etc., to achieve good economic effect, excellent road performance, and durability against water damage

Active Publication Date: 2021-05-07
广州市市政工程试验检测有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a high-performance ultra-thin asphalt wear layer design method for the problems existing in the existing ultra-thin wear layer. On the basis of reducing the thickness of the asphalt mixture wear layer and reducing the construction cost, the asphalt pavement can be guaranteed. Performance

Method used

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  • Design method of high-performance ultrathin asphalt wearing layer
  • Design method of high-performance ultrathin asphalt wearing layer
  • Design method of high-performance ultrathin asphalt wearing layer

Examples

Experimental program
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Effect test

Embodiment 1

[0060] To design a HPUT-10 wear layer for general roads, with a thickness of 2cm, the main steps are as follows, and the flow chart is as follows figure 2 Shown:

[0061] S1: Raw material performance testing

[0062] The asphalt mix design uses high-viscosity and high-elasticity modified asphalt, and its technical indicators are shown in Table 4, which meets the technical requirements of Class I-D and PG76-28 stipulated in the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004).

[0063] Table 4 Test results of high-viscosity and high-elasticity modified asphalt

[0064]

[0065]

[0066] The asphalt mix design uses coarse aggregate particle size specifications of 5-10mm and 3-5mm respectively; fine aggregate is 0-3mm stone chips, and the aggregate test is strictly in accordance with the "Highway Engineering Aggregate Test Regulations" (JTG E42-2005 ) requirements and methods for testing, see Table 5 for aggregate density and Table 6...

Embodiment 2

[0110] To design a HPUT-10 wearing layer for tunnel pavement and bridge deck pavement, with a thickness of 2cm, the main steps are as follows:

[0111] S1: Raw material performance testing

[0112] The asphalt is mainly Shell SBS (I-D) modified asphalt, and the test results are shown in Table 12.

[0113] Table 12 Test results of SBS(I-D) modified asphalt

[0114]

[0115] Coarse aggregate and fine aggregate are both made of diabase; mineral powder is limestone; anti-stripping agent uses 1.5% P.O.42.5 cement to improve the adhesion between asphalt and aggregate; flocculent wood fiber and flame retardant are added. The aggregate test results are shown in Table 13.

[0116] Table 13 aggregate test results

[0117]

[0118] S2: Select the initial grading

[0119] Select a grading curve this time. If a certain technical index does not meet the requirements during the design process, return to this step for corresponding adjustments. See Table 14 for aggregate screening res...

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Abstract

The invention provides a design method of a high-performance ultrathin asphalt wearing layer, and relates to the technical field of road engineering. According to the design method, the double design principle of the high-performance ultrathin asphalt wearing layer with macroscopic and microscopic control indexes is provided. The macroscopic indexes are improved Bailey method parameters [CA] ratio, [FAc] ratio and [FAf] range, VCAmix is less than or equal to VCADRC, and the microscopic index is that the average coordination number is greater than or equal to 1.3, so that the use performance of the asphalt pavement is ensured on the basis of reducing the thickness of the wearing layer of the asphalt mixture and reducing the construction cost. The ultrathin asphalt wearing layer obtained by the design method has the advantages of low construction cost, dense skeleton, watertight pavement and no pollution to the environment, and the pavement performance of the wearing layer, such as rutting resistance, skid resistance, watertightness and durability of the skeleton of the pavement, is obviously improved.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a design method of a high-performance ultra-thin asphalt wear course (Highperformance ultra thin, HPUT-10). Background technique [0002] The wearing layer of asphalt pavement is the pavement structural layer that is directly in contact with the natural environment, and is subjected to repeated actions such as traffic load, rain and light. Therefore, the wearing layer of asphalt pavement requires good anti-rutting, anti-water damage, anti-fatigue cracks and durability In addition to road performance, it must also have good anti-skid and wear resistance, and some special road sections may also need to have low noise and good drainage. [0003] At present, during the use of asphalt pavement, the most prominent early diseases are often manifested as insufficient anti-skid and anti-rutting performance, resulting in the need for preventive maintenance or overhaul of the pavem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20C04B26/26C04B111/00G06F113/26G06F119/04
CPCG06F30/20C04B26/26C04B2111/0075C04B2201/50G06F2113/26G06F2119/04C04B18/141C04B14/02C04B18/26C04B14/14C04B14/28C04B7/02C04B2103/63Y02W30/91
Inventor 孙晓立石立万杨军卞德存
Owner 广州市市政工程试验检测有限公司
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