Method for testing bearing state of asphalt mixture aggregate framework
A technology for asphalt mixture and state testing, which is applied in the direction of applying repeated force/pulsation force to test material strength, measuring devices, and analyzing materials, etc., which can solve the problems that the bearing effect cannot be effectively quantitatively evaluated, etc.
Active Publication Date: 2020-10-30
HAINAN UNIVERSITY
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the research bottleneck that the load-bearing effect of the existing aggregate skeleton in the asphalt mixture cannot be effectively quantitatively evaluated, and to provide a method for testing the distribution load state of the aggregate skeleton inside the asphalt mixture
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[0031] The specific implementation manner of the present invention will be described in detail below in combination with the technical scheme and the accompanying drawings.
[0032] Step 1, Instrument Preparation
[0033] The present invention needs to use the "Bidirectional Strain Test Sensor for Cylindrical Test Specimen Based on Fiber Bragg Grating" (Patent No. ZL201520964823.6) or "Lateral Stability Sensor for Asphalt Pavement Material Based on Fiber Bragg Grating" (Patent No. ZL201410076966.3) The deformation test sensor continuously records the loading direction or lateral deformation of the specimen. The strain test accuracy of the specimen is not lower than several microstrains, and the sampling frequency is not lower than 100HZ.
[0034] Step 2, Test Specimen Preparation
[0035] Prepare or prepare at least two sets of cylindrical test pieces of the same size at the same time. If it is used for asphalt mixture gradation design, the test pieces are composed of the sa...
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The invention belongs to the technical field of asphalt pavement material design, and provides a method for testing the bearing state of an asphalt mixture aggregate framework. Based on the prior art,the experimental method is not complex, and the problem that the aggregate skeleton in the asphalt mixture exerts the force bearing effect and cannot be clearly and quantitatively tested is solved. Common diseases of tracks, fatigue cracking and the like of the asphalt pavement are all caused by the fact that vehicle and environment loads obviously exceed the bearing range of mucilage, and the distribution of the aggregate framework to the loads further influences the disease resistance of the mixture. The method provided by the invention can be used for quantitatively guiding the grading design of the asphalt mixture and evaluating the construction quality of the asphalt pavement, and can be used for analyzing the influence of different aggregate grades on the macroscopic performance variability of the mixture. The method can also be used for quantitatively analyzing the load bearing state of the mucilage in the mixture.
Description
technical field [0001] The invention belongs to the technical field of asphalt pavement material design, and relates to a method for testing the load-bearing state of an asphalt mixture aggregate skeleton. Background technique [0002] Road is an important part of transportation infrastructure. In recent years, my country's road construction investment has accounted for 2%-3% of my country's GDP. More than 95% of expressways and ordinary national and provincial roads in my country use asphalt pavement, and the mileage of asphalt pavement at all levels reaches 1.3 million kilometers. Only expressways need to be overhauled and reconstructed for nearly 10,000 kilometers every year. From a global perspective, the early disease problem of roads has never been fundamentally resolved. On the other hand, the impact of road maintenance on road traffic has become more and more unbearable, and it is easy to cause vicious traffic accidents. Therefore, with the development of the econo...
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Login to View More IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0007G01N2203/0073G01N2203/0067G01N2203/0075
Inventor 刘婉秋赵延庆刘畅
Owner HAINAN UNIVERSITY