Abstract
The acoustical performance of asphalt pavements changes with time due to combined effects of environmental conditions and various distresses induced by repeated and heavy traffic. This study examined the changes in the acoustical performance of dense graded asphalt (DGA) pavements over time in the State of Qatar. Tire-pavement noise was measured using on board sound intensity (OBSI) method. The OBSI noise measurements were conducted on DGA pavements with different age and the results were analyzed to evaluate the effect of aging on tire-pavement noise. The results demonstrated that the tire-pavement noise increased with pavement age. The frequency analysis of three road segments showed that at early stage of pavement service life, the noise level is more affected at higher frequency due to the densification and increased air pumping mechanism. At later stage of pavement service life, the noise level is more affected at lower frequency due to the change in pavement surface conditions (e.g., cracking and raveling).
Highlights
The age of asphalt pavements has a significant influence on the level of tire-pavement noise
The increase of noise intensity was almost 1.5 dBA when comparing pavement sections constructed in 2016 and 2010, whereas almost 3dBA increase of noise intensity was observed while comparing pavement constructed in 2016 and the old road segment. These results demonstrated that the acoustical performance of asphalt pavement deteriorated with time
This paper investigated the changes of acoustical performances of dense graded asphalt (DGA) pavement over time in the State of Qatar by using the OBSI method
Summary
The age of asphalt pavements has a significant influence on the level of tire-pavement noise. A number of research studies have evaluated the effect of pavement age on tire-pavement noise, little work has been conducted on this subjected in the gulf region where pavement surface is subjected to elevated temperature (i.e., the pavement surface temperature can reach up to 600C). This elevated ambient temperature accelerates the aging of asphalt mixtures due to binder oxidation, leading to fatigue cracking and eventually pavement failure with heavy and repeated traffic loading. It will assist pavement engineers in this region to predict pavement noise with the use of traffic noise model (TNM) at various stages of pavement service life with good accuracy
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