Coupled Numerical Analysis of Anti-crack Mechanism of Large Stone Asphalt Mixture

2010 ◽  
Vol 4 (2) ◽  
pp. 22-26
Author(s):  
Qingchang Lu ◽  
Jianmin Zi ◽  
Haijun Wang ◽  
Qiuxi Huang ◽  
Wei Wan
Keyword(s):  
Numerical Analysis ◽  
Asphalt Mixture ◽  
Large Stone

scholarly journals Fracture Performance of a Large-Stone Asphalt Mixture Based on a Monotonic Tensile Overlay Test

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jianhui Wei ◽  
Tao Fu ◽  
Junlin Liang
Keyword(s):  
Constitutive Model ◽  
Fracture Energy ◽  
Asphalt Mixture ◽  
Test Results ◽  
Large Stone ◽  
Loading Mode ◽  
Disturbed State Concept ◽  
Study Results ◽  
Fracture Performance ◽  
Base Course

A large-stone asphalt mixture (LSAM) is usually used as the base course of asphalt pavement to prevent the generation of cracks. However, there are few studies on the fracture performance and crack resistance of LSAMs. Under the monotonic tensile loading mode, the overlay test (OT) was explored to investigate the influence of different test factors on the cracking resistance and fracture performance. The study results indicated that a change in temperature and aging results in a variation in fractal dimension, the fracture energy of crack growth is higher than that of crack initiation, and fracture energy is increased to a certain extent by decreased temperature, an increased loading rate or increased aging. Finally, a constitutive model is established based on the disturbed state concept (DSC), and the proposed constitutive model is consistent with the test results.

Case Study of a Composite Layer with Large-Stone Asphalt Mixture for Heavy-Traffic Highways

2020 ◽  
Vol 146 (1) ◽  
pp. 04019040 ◽  
Author(s):  
Zila M. G. Mascarenhas ◽  
Matheus S. Gaspar ◽  
Kamilla L. Vasconcelos ◽  
Liedi L. B. Bernucci ◽  
Amit Bhasin
Keyword(s):  
Heavy Traffic ◽  
Asphalt Mixture ◽  
Composite Layer ◽  
Large Stone

Structural Mechanics Analysis of Asphalt Pavement Using Large Stone Asphalt Mixture as Base

2013 ◽  
Vol 838-841 ◽  
pp. 1221-1226
Author(s):  
Xu Liang ◽  
Yin Gu ◽  
Jin Chang Wang ◽  
Ming Xing Yan ◽  
Si Zeng You
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Rigid Base ◽  
Pavement Rehabilitation ◽  
Large Stone ◽  
Base Materials ◽  
Bending Strain ◽  
Flexible Base ◽  
Surface Deflection ◽  
Pavement Base

Asphalt pavement with semi-rigid base is the major structure adopted in the new built highway and municipal roads in China. So as to reduce the unfavorable impact on the rehabilitation of municipal roads which require quick resumption of traffic, better base materials should be adopted. If a pavement base fails, the flexible base, i.e. large stone asphalt mixture (LSAM), should be employed in the pavement rehabilitation practice. Focusing on the practice pavement sections using LSAM as base in Hangzhou municipal roads, the effect factors of subgrade modulus, base modulus and base thickness on surface deflection and bending strain in base bottom is analyzed. That work is done through finite element method of software BISAR3.0. The results provide a practice reference for municipal roads rehabilitation needing to open traffic early.

scholarly journals Study on Volume Index Test and Control of Large Stone Porous Asphalt Mixture

2021 ◽  
Vol 769 (3) ◽  
pp. 032014
Author(s):  
Zhigeng Zhang ◽  
Jiasheng Zhao ◽  
Fangtao Liu ◽  
Fei Yang
Keyword(s):  
Asphalt Mixture ◽  
Volume Index ◽  
Index Test ◽  
Porous Asphalt ◽  
Large Stone ◽  
And Control

Experimental Study on Performance of Large Stone Permeable Asphalt Mixtures

2013 ◽  
Vol 838-841 ◽  
pp. 76-79
Author(s):  
Jin Cheng Wei ◽  
Sheng Di Lu ◽  
Jin Li
Keyword(s):  
Dynamic Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Cellulose Fiber ◽  
Structure Design ◽  
Volume Index ◽  
Index Test ◽  
Modified Asphalt ◽  
Large Stone ◽  
Flexible Base

This study focused on the performance of the Large Stone Permeable Asphalt Mixture (LSPM) with neat asphalt and its feasibility to use as asphalt pavement flexible base. For comparision, LSPM mixtures were designed respectively with neat 60/70-grade asphalt and modified asphalt and the performance of LSPM was studied and compared by volume index test, draindown test, Hamburg Wheel-tracking Test and dynamic modulus test. The results showed that the performance of LSPM with modified asphalt was superior to LSPM with neat asphalt and cellulose fiber, but draindown and rutting performance of LSPM with neat asphalt met requirements of corresponding specification and dynamic modulus of LSPM with neat asphalt had the same characteristic with LSPM with modified asphalt, which proven that LSPM with neat asphalt can use as asphalt pavement flexible base by properly mix design and pavement structure design.

Cracks Resisting Mechanism Analysis of Large Stone Mixture Base Based on Mechanics Calculations

2013 ◽  
Vol 723 ◽  
pp. 729-736
Author(s):  
Hong Zhi Li
Keyword(s):  
Temperature Stress ◽  
Coupling Effect ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Element Model ◽  
Stress And Strain ◽  
Mechanism Analysis ◽  
Large Stone ◽  
Pavement Structure ◽  
Pavement Structures

In order to study the cracks resisting mechanism of large stone asphalt mixture base, a multi-layer elastic theory program was used to calculate the loading stress in different pavement structures. Then a Finite Element model was established based on a twinkling heat conduct hypothesis to calculate temperature stress and strain of pavement structure when temperature dropped. Finally, the stress and strain of all the structural layers was calculated considering the coupling effect of loading and temperature. It is found that temperature stress which is caused by temperate quick dropped is far more lager than loading stress cause by standard loading, while considering the co-effect of vehicle loading and temperature quickly dropped. Thus it is revealed that cracking in pavement is mainly caused by temperature quickly dropped. By contrast, it is found that pavement stress and strain caused by loading and temperature of the structure with asphalt macadam mixture (ATB30) base are less than that of the conventional semi-rigid pavement. Finally, an asphalt macadam mixture base applied in asphalt pavement structure is believed to be an efficient way in reducing asphalt pavement cracking.

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