A Method of Determining the Three-Dimensional Strength Model of Asphalt Mixture Using Conventional Tests
A technology of asphalt mixture and strength model, which is applied in the direction of using stable shear force to test material strength, using stable tension/pressure to test material strength and strength characteristics, etc. It can solve the complex theoretical calculation and many damage samples. , expensive equipment and other problems, to achieve the effect of simple calculation, simple method, and expensive equipment
Active Publication Date: 2020-06-02
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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The method for determining the three-dimensional strength model of asphalt mixture in the present invention can solve the disadvantages of expensive equipment, complicated theoretical calculations and many damaged samples in the prior art method
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[0043] In the following, the technical solutions and advantages of the present invention will be explained and described in more detail in combination with the accompanying drawings and specific implementation methods. It should be understood that the contents presented in the description, specific implementation methods and drawings of the description are only for more clearly illustrating the technical solution and advantages of the present invention, and do not limit the protection scope of the present invention. Those skilled in the art can obtain changed technical solutions for various reasonable transformations on the basis of the disclosure content of the specification. As long as they do not deviate from the spirit of the present invention, all changed technical solutions are included in the protection scope of the present invention. Inside.
[0044]
[0045] Including the following specific steps:
[0046] 1. Form the asphalt mixture according to the raw materials ...
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Abstract
The invention provides a method for determining a bituminous mixture three-dimensional strength model by adopting a routine test. According to the method, a traditional uniaxial compression test, a split test and a uniaxial tension test are needed to perform; and test results are substituted into a linear bituminous mixture three-dimensional strength model equation to obtain an expression of a bituminous mixture three-dimensional failure criterion. The method has the advantages that the routine tests are needed only, and a triaxial test is not needed, so that the method is easy and convenientto generalize, and general engineering academies and design departments can ability to complete related test and analysis work; in addition, the model has high precision and can be verified through three-dimensional load test results of a bituminous mixture. Through the method, a test means and a theory reference are provided for designing bituminous pavement material and structure according to athree-dimensional stress state, thus improving the refinement level of a bituminous pavement design.
Description
technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a method for determining a three-dimensional strength model of asphalt mixture by conventional tests. [0002] technical background [0003] By the end of 2017, the mileage of expressways in China was 136,000 kilometers, ranking first in the world, of which more than 90% are asphalt pavement structures. At present, the main problem encountered in pavement practice is that the actual life of the pavement is lower than the design life, resulting in a lot of waste. The service life of many asphalt pavement structures is 10 to 12 years, which is far from the design life of more than 15 years. There have even been serious damages to many expressways built in the early stage within half a year to two years, and the losses are astonishing. [0004] A large number of problems exposed in pavement practice have prompted scholars to do a lot of research and improvement work on p...
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IPC IPC(8): G01N3/08G01N3/24
CPCG01N3/08G01N3/24G01N2203/0026G01N2203/0256
Inventor 黄拓李咪郑健龙刘宏富于华南文丕华
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY