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Li W.,Changan University | Li W.,Ministry of Transportation Pavement Materials Engineering Center | Fan W.,Changan University | Han Q.,Changan University
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2011

In this paper, the largely exciting force vibratory roller developed by Chang'an university was used to produce 30cm specimen which compare with the compaction property of the common specimen which produced by standard vibratory compactor. Meanwhile, combined with the compaction characteristics of thick cement stabilized macadam base effected by high exciting vibration force. Research found that in the large excitation force, the thick layer of cement stabilized crushed stone maximum dry density increased significantly, whereas primary difference between the upper and lower part of the degree of compaction can be controlled effectively. In the premise of ensuring a minimum degree of compaction, the large excitation can increase the rolling thickness. The dose of cement found little difference from top to bottom. The distribution of stone volume have a certain regularity. Also the distribution continuity of cement stabilized macadam was fine, which prevented the base reflection positively. Source


Tian Y.-G.,Changan University | Tian Y.-G.,Ministry of Transportation Pavement Materials Engineering Center | Xiang L.-F.,Zhejiang Highway Bureau | Li W.-G.,Changan University | Li W.-G.,Ministry of Transportation Pavement Materials Engineering Center
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2011

Though the application prospect of thick cement stabilized macadam was broad because of its high stiffness and the strong ability to disperse load, there was no unified test and evaluation method for its compaction degree. Based on this, comparing and analyzing three different compactness test methods, a compaction detection methods of thick cement stabilized macadam was concluded and used to evaluate an experimental road. According to the tracking study, the method was confirmed to be simple and effective, which could be used to evaluate the compaction degree of the thick stable macadam in site successfully. Source


Tian Y.-G.,Changan University | Tian Y.-G.,Ministry of Transportation Pavement Materials Engineering Center | Han Q.,Changan University | Tian S.-L.,Changan University | And 2 more authors.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2010

Based on laboratory experiments and the investigated results of the 148 representative core samples of two typical highways about 101 km in Shanxi Province, the influence of inter-layer state on the performance of road structure were studied. The results showed that the widely existing non-continuous layer was one of the most important factors which reduced the fatigue life of the road surface; the un-continuity of the surface layers and the base could cause the tensile stress of the bottom of the surface layers exceeding the limited stress. The non-continuity between the base layer could change the overall force of the original base into multi-plate force, which raised the tensile stress at the bottom plate and caused anti-fatigue performance reducing greatly. So it was essential to improve the overall performance of the base layer to ensure the normal use of the highways. Source

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