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Development Status and Prospect of Integrity Grassroots

Author: HanQing
Tutor: LiZuoGuang
School: Chang'an University
Course: Materials Science
Keywords: Holistic grassroots Interlayer contact state Longitudinal continuity Aggregate distribution characteristics Disease Analysis
CLC: U416.2
Type: Master's thesis
Year: 2011
Downloads: 34
Quote: 0
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Abstract


Semi - rigid base course of pavement grassroots structure , in recent years , due to the impact of the structure , materials and construction , and other factors , the integrity of the primary structure of the same material paving is widely used in China 's southeastern region , traditional the practical effects of the similarities and differences between the two types of grass-roots of the grass-roots level , holistic grassroots structure type , using the same material , paving the grassroots improve \Based on this , the research group selected highway maintenance to carry out research of more than 500 kilometers , over 300 core- sample survey based on analysis of a typical disease especially grassroots diseases . The study found that the identical to the two structures disease manifestations . Core sample combined with image analysis of layered construction caused grassroots longitudinal continuity be seriously affected , which is caused by the depth of influence accounted for one-third of the total thickness of the main reason for the poor of the integrity of the holistic grassroots . To solve this problem , to carry out a performance impact study the different aggregate contact state between continuity and layer of cement stabilized gravel , studies have shown that aggregate longitudinal continuity of the destruction caused by the use of performance reduced by 16.7 to 27.8% , aggregate longitudinal non- continuous and state coupling between layers , integrated road performance to reduce nearly 1 / 3 . Holistic grassroots overall performance has been greatly affected because of the existence of the state of aggregate longitudinal continuity and inter-layer structural calculations to verify the above conclusion . Research results to improve the integrity of the primary use of the status quo , as well as guiding the design and conduct follow-up studies of such grassroots structure has a high practical value .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering
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