Method for testing rut of rigid-flexible composite pavement structure

A composite pavement and testing method technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., to achieve good results, wide application range, and good scientific evaluation

Active Publication Date: 2018-03-30
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a test method for the rutting of the rigid-flexible composite pavement structure for the complex structure of the rigid-flexible composite pavement. Provide scientific basis for anti-rutting design and durability of composite pavement structures

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  • Method for testing rut of rigid-flexible composite pavement structure

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Embodiment Construction

[0019] In order to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the present invention.

[0020] A kind of testing method of rigid-flexible composite pavement structure rutting of the present invention, carries out the test through the Hamburg rutting instrument, and the test piece is a composite test piece, refer to figure 1 As shown, the composite specimen is composed from bottom to top of SBS modified asphalt SMA-16 with a thickness of 6cm, a cement concrete panel with a thickness of 3cm, and a composite material with a thickness of 3cm as an example to prepare a composite specimen; firstly, the composite material (4) Composed of rubber powder, sand, and gravel with a single particle size, the maximum particle size...

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Abstract

The invention discloses a method for testing a rut of a rigid-flexible composite pavement structure. A test is carried out through a Hamburg rut instrument, a test piece is a composite test piece andis placed in a test mold of the Hamburg rut instrument; the composite test piece consists of an asphalt concrete surface layer, a cement concrete panel and a composite material in sequence from top tobottom, an adhesive layer is arranged between the asphalt concrete surface layer and the cement concrete panel, and the test piece is formed from bottom to top; the composite material is composed ofrubber powder, sand and broken stones with a single particle size, vibration compaction is adopted to form the composite material, a dynamic triaxial test is used to determine a rebound modulus of thecomposite material, and the proportion of the rubber powder, the sand and the broken stones with a single particle size is determined by whether 95-105% of a required rebound modulus value is reachedor not; and after a normal test is started, the test is ended after the rut depth reaches 20mm. The testing method provided by the invention can provide a scientific basis for improving the rutting resistance design and durability of the rigid-flexible composite pavement structure.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and relates to a test method for rutting of a rigid-flexible composite road surface structure. Background technique [0002] Rigid-flexible composite pavement usually refers to the composite pavement formed after cement concrete pavement is paved with asphalt surface layer. Rutting and cracks are the main diseases. Among them, rutting seriously affects the performance of rigid-flexible composite pavement, which brings great harm to driving. Security risks. The structure of rigid-flexible composite pavement is very different from that of ordinary asphalt pavement. It is difficult to scientifically evaluate the rutting of rigid-flexible composite pavement by considering the structural characteristics of rigid-flexible composite pavement by traditional test methods. The main reason is that the traditional rutting test mostly prepares specimens for a certain structural layer of asphalt pave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
CPCG01N3/18G01N2203/0019G01N2203/0037G01N2203/0226
Inventor 李盛杨帆刘朝晖房硕刘萌
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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