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A detection method for compaction shear characteristics of asphalt mixture during construction compaction

A technology of asphalt mixture and detection method, which is applied to the direction of testing material strength, strength characteristics, and material inspection products by applying stable shear force, which can solve the problems of high quality hidden dangers and insufficient stability, and achieve simple operation and good performance. The effect of compaction and accurate test results

Active Publication Date: 2022-02-11
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0018] Aiming at the technical deficiencies of the existing single compaction degree index in the control of the pavement compaction process, the stability is relatively insufficient and the quality hidden danger is relatively large, the purpose of the present invention is to provide a The characteristic detection method can simply, quickly and accurately measure the compaction detection index of the asphalt mixture during the compaction process, and combine it with the existing compaction degree to form a dual-index control, which can be used to accurately evaluate the compactness of the asphalt mixture. Determine the compaction status of the asphalt mixture during the construction process, and adjust and control the construction process and construction quality in a timely manner according to the test results

Method used

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  • A detection method for compaction shear characteristics of asphalt mixture during construction compaction
  • A detection method for compaction shear characteristics of asphalt mixture during construction compaction
  • A detection method for compaction shear characteristics of asphalt mixture during construction compaction

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Embodiment 1

[0054] In this embodiment, take the AC-13C asphalt mixture on the upper layer as an example. The mixture is in the state after paving. For example, three types of road rollers are used for compaction in a certain road section. The selection of rolling methods is shown in Table 2:

[0055] Table 2 Rolling method of a road section

[0056]

[0057] The initial pressure should be rolled immediately after the paver. After static pressure with steel cylinder roller, the compactness of asphalt mixture should be measured by non-nuclear density meter, and the real-time compaction detection of the mixture should be measured by the compaction shear characteristic detection device. Index K / K min and the internal temperature T of the mixture. Among them, the electric motor drives the stirring shaft to rotate at a slow and uniform speed, and the speed can be freely selected from 5 degrees / min to 10 degrees / min. The compaction status detection indicators are shown in Table 3:

[0058] ...

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Abstract

The invention discloses a method for detecting the compaction shear characteristic of asphalt mixture in the construction compaction process. The internal temperature and shear characteristics of the mixture during paving and subsequent rolling are measured by slow rotation at a constant speed, and the corresponding compaction detection index is calculated according to its shear characteristics. According to the real-time detection index, the construction quality and construction The process is monitored and directed accordingly. The invention can simply, quickly and accurately measure the compaction detection index of the asphalt mixture in the compaction process, together with the compaction degree of the asphalt pavement, it forms a dual-index quality control of the compaction process, which can be used to accurately evaluate the compaction effect of the asphalt mixture The advantages and disadvantages of the asphalt mixture in the construction process to determine the compaction state.

Description

technical field [0001] The invention belongs to the technical field of asphalt mixture compaction detection, and relates to a method for detecting the compaction shear characteristics of asphalt mixture in the construction compaction process, which is used to evaluate the quality of asphalt mixture compaction, and according to the real-time detection results The construction quality and construction process shall be monitored and guided accordingly. Background technique [0002] Compaction is the last process of asphalt pavement forming, and construction compaction control is a necessary means to ensure the quality, physical and mechanical properties and road performance of asphalt mixture meet the requirements. my country's asphalt pavement construction technical specifications stipulate the compaction control indicators and methods of asphalt pavement, and make detailed regulations on the location, frequency, and allowable deviation of the test. The traditional compaction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/22G01N33/42
CPCG01N3/22G01N33/42G01N2203/0003G01N2203/0021G01N3/066G01N3/24G01N2203/0025G01N2203/0085G01N2203/0256G01N2203/0248E01C23/01G01N2203/003
Inventor 钱国平于华南史长云龚湘兵李希蔡军吴文超
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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