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Design method of stable asphalt recycled aggregate layer

A technology of recycled aggregates and design methods, which can be applied to cohesive pavements, roads, roads and other directions paved on site, and can solve the problems of inability to realize integrated control of rutting and low input costs

Active Publication Date: 2015-02-18
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method has simple steps, reasonable design based on the technical properties of construction waste recycled aggregate, low input cost, easy operation and good use effect, and can effectively solve the problem that the existing asphalt-stabilized recycled aggregate design method cannot realize the integration of pavement structure and materials Defects of rutting

Method used

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  • Design method of stable asphalt recycled aggregate layer

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Embodiment

[0064] The design method of the asphalt-stabilized recycled aggregate layer of the present invention, the specific method process reference figure 1 ,Specific steps are as follows.

[0065] Step 1: Determine the pavement structure combination and thickness.

[0066] (1) Traffic analysis

[0067] For the design of a new expressway, the average daily traffic volume and representative vehicle models in the first year of operation are shown in Table 1.

[0068] Table 1 Traffic volume and vehicle composition in 2013

[0069]

[0070] The combination design of the pavement structure takes the standard axle load of 100kN on the single axle of the double-wheel set (BZZ-100), and converts various axle loads into standard axle loads. The results are shown in Table 2 and Table 3:

[0071] Table 2 Axle load conversion result table (deflection)

[0072]

[0073] Table 3 Axle load conversion results (bottom tensile stress of semi-rigid base layer)

[0074]

[0075] According t...

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Abstract

The invention relates to the technical field of construction waste recycling, and particularly relates to a design method of a stable asphalt recycled aggregate layer. The design method comprises the following steps: 1, determining a material and the thickness of each structure layer of a pavement structure according to a design method of 'highway asphalt pavement design specification' (JIG D50-2006); 2, calculating the maximum shearing stress taui of each asphalt pavement according to the material and the thickness of each asphalt pavement; 3 calculating the receptible rut depth [Rr] of the stable asphalt recycled aggregate layer according to the maximum shearing stress taui of each asphalt pavement, and then calculating a dynamic stability permissible value [DS] of the stable asphalt recycled aggregate layer; and 4 carrying out a gradation composition design of the stable asphalt recycled aggregate layer, determining the optimal asphalt use amount, and carrying out a rutting test for testing the dynamic stability DS, so as to enable DS to be greater than or equal to [DS]. The design method of the stable asphalt recycled aggregate layer, disclosed by the invention, is reasonable in design, low in cost, and easy to use and operate; the service life of the pavement can be prolonged; and the maintenance cost of the pavement is lowered.

Description

technical field [0001] The invention relates to the technical field of reuse of construction waste, and specifically discloses a design method for an asphalt-stabilized recycled aggregate layer. technical background [0002] Construction waste refers to solid waste generated in other situations such as construction and demolition of buildings (structures), road construction and renovation, concrete production and engineering construction. The construction and demolition of civil engineering will produce a large amount of construction waste. my country is in the peak period of construction, and the construction waste generated every year reaches 600 million tons, of which the abandoned cement concrete accounts for more than 60%. [0003] Recycled Concrete Aggregate (RCA) refers to the aggregate with a particle size of less than 40mm formed by the waste cement concrete in construction waste after sorting, ribbing, crushing and grading, including recycled coarse aggregate (4.75...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32
CPCE01C7/18
Inventor 纪小平侯月琴王延海曹海利王海燕刘陵庆
Owner CHANGAN UNIV
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