Density Resilient-Modulus Correlation in Stone Mastic Asphalt Mixture Using Automated Roller Compactor
Resilient or stiffness modulus (MR) is the key property that has been utilized to characterize asphalt mixture and other structural properties for flexible pavement design. MR is generally obtained by testing laboratory compacted samples which are compacted to a density similar to that achieved i...
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| 格式: | Thesis |
| 语言: | English English |
| 出版: |
2009
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| 主题: | |
| 在线阅读: | http://psasir.upm.edu.my/id/eprint/7310/1/FK_2009_26a.pdf |
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| 总结: | Resilient or stiffness modulus (MR) is the key property that has been utilized to
characterize asphalt mixture and other structural properties for flexible pavement
design. MR is generally obtained by testing laboratory compacted samples which
are compacted to a density similar to that achieved in the field under traffic.
However, resilient modulus test has been considered as a complex, timeconsuming,
and expensive experiment. In addition, the poor simulation of field
compaction by the present compaction methods may results in less accurate and
unrealistic data for pavement design, especially in SMA mixtures. Hence, the main
objective of this study was to develop correlation between density and resilient
modulus properties of Stone Mastic Asphalt (SMA) slabs compacted using a newly
developed roller compactor named Turamesin. Turamesin, which has proven to be capable of simulating field compaction conditions in the laboratory, is also able to
produce laboratory samples with desired density and uniformly distributed
properties. To come up with research objectives, total numbers of five slabs with
different targeted level of air voids were prepared and core specimens were
subjected to different tests of bulk density, air voids, resilient modulus (at 25°C and
40°C), Marshall stability, and flow. Statistical methods including regression
analysis were then conducted and from the results, it was found that the stiffness
properties of Turamesin compacted SMA slabs are directly affected by physical and
volumetric properties of mixtures in terms of density and air voids. To correlate
density with MR at 25°C and 40°C, two different equations were developed. These
findings then were employed to establish guideline on density-resilient modulus
which is included with two main and two imaginary line, making possible to
determine MR of the mixture at any temperature of 25°C, 30°C, 35°C, and 40°C
without need to conduct a complex, time-consuming, and expensive resilient
modulus test. |
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