Method for determining asphalt-aggregate ratio of asphalt mixture based on performance requirements

A technology of asphalt mixture and determination method, applied in the field of asphalt mixture, can solve the problems of road performance not meeting design requirements and large errors, and achieve the effect of increasing test efficiency and improving test accuracy

Pending Publication Date: 2022-07-29
中铁建新疆京新高速公路有限公司 +1
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Problems solved by technology

For example, due to the limitation of the measurement environment and the level of the measuring personnel, the gross bulk density of the aggregates has a large error in the measurement of the aggregate bulk density at different times and by different personnel.
In addition, although the volume parameters meet the requirements, its road performance cannot meet the design requirements

Method used

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  • Method for determining asphalt-aggregate ratio of asphalt mixture based on performance requirements
  • Method for determining asphalt-aggregate ratio of asphalt mixture based on performance requirements
  • Method for determining asphalt-aggregate ratio of asphalt mixture based on performance requirements

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Experimental program
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Embodiment 1

[0032] This embodiment includes the following steps:

[0033] Step 1. Prepare 12 kinds of asphalt mixture samples to obtain 12 load samples and 12 rutting samples; among the 12 load samples, there are 3 samples labeled 20#, 30#, 50# and 70# respectively. The whetstone ratios of every 3 load samples with the same label are 4.53%, 5.67% and 7.56% respectively; among the 12 rutting samples, there are 3 samples labeled 20#, 30#, 50# and 70# respectively, The whetstone ratios of every three rut samples with the same number are 4.53%, 5.67% and 7.56% respectively;

[0034] The preparation process of the loaded sample is as follows: using a gyratory compactor to press the asphalt mixture into a cylindrical asphalt mixture sample, wherein the loading pressure is 0.6MPa, the rotation angle is 1.25°, and the rotation speed is 30r / min; The diameter of the asphalt mixture sample is 150mm and the height is 62mm, and then both ends of the asphalt mixture sample are cut off to obtain a cyli...

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Abstract

The invention discloses an asphalt mixture asphalt-aggregate ratio determination method based on performance requirements, which comprises the following steps: 1, performing sample preparation on an asphalt mixture to obtain a load sample and a rut sample; 2, respectively carrying out a load test and a rut test on the load sample and the rut sample to obtain load test times and dynamic stability; 3, inputting the load test times and the dynamic stability into an expert system for response surface analysis to obtain a two-dimensional performance profile diagram and a three-dimensional performance response diagram; and 4, compounding the two-dimensional performance profile diagrams to obtain a performance superposition diagram. A plurality of load samples and a plurality of rut samples are subjected to load tests and rut tests respectively, then two-dimensional performance profile diagrams and three-dimensional performance response diagrams are obtained through response surface analysis, then the two-dimensional performance profile diagrams are compounded to obtain a performance superposition diagram, and only one group of materials needs to be designed, so that the performance superposition diagram is obtained. The optimal asphalt-aggregate ratio of the asphalt mixture under the condition of performance requirements can be obtained, and the test efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of asphalt mixtures, and in particular relates to a method for determining the oil-to-stone ratio of asphalt mixtures based on performance requirements. Background technique [0002] Asphalt pavement in highway construction is mainly made of asphalt mixture paved on the base and compacted by road rollers. The type of asphalt and the ratio of oil and stone in the asphalt mixture will affect the crack resistance of the asphalt mixture. Therefore, before large-scale pavement construction, it is necessary to test and inspect the crack resistance of the asphalt mixture to determine the optimal performance of the asphalt mixture. Best bitumen type and oil-to-stone ratio. [0003] In the current design of asphalt mixture, the selection of asphalt grade and oil-stone ratio is based on the volume parameter method, and the measurement of the volume parameter method has a large error. For example, the gross bulk dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/30G01N3/34G01N33/42G01N1/28
CPCG16C20/30G01N3/34G01N33/42G01N1/2806G01N1/286G01N2001/2873
Inventor 林毅许玉和叶尔木拉提·木哈得尔邓建波徐云龙李宁博郝培文
Owner 中铁建新疆京新高速公路有限公司
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