Singh, Japleen <br/><br/>
Comparison of bituminous mixture properties at Various stages of construction of pavement 

 - Vol.36(2), April-June 
 - Pune  NICMAR  2021 
 - 13-22p. 
<br/><br/> Construction of bituminous pavements includes production, transportation, and<br/>compaction of bituminous mixtures. The bituminous pavements undergo aging during<br/>various stages from production to the end of service life. The initial aging, which<br/>happens during production to compaction stage is termed as short term aging and has<br/>profound effect on the mixture behaviour. As aged binder becomes stiff relative to virgin<br/>binder, it is important to quantify such effects on mixture behaviour. In order to<br/>investigate the density, stability and aging in bituminous pavements, mixtures were<br/>collected from hot mix plant, at site in front of paver at various distances from hot mix<br/>plant, and cores from compacted mixtures at different time periods. Marshall Method<br/>was used to compact mixtures in laboratory to determine volumetric and mechanical<br/>properties. Further, the bitumen was extracted from representative specimens to<br/>determine the rheological properties such as complex shear modulus and viscosity<br/>using Dynamic Shear Rheometer (DSR). The rheological properties were used to<br/>quantify differences in binder behaviour subjected to different stages of aging. It was<br/>found that bitumen extracted from the field core had better recovery characteristics and<br/>highest complex shear modulus than the bitumen extracted from the paver and Hot Mix<br/>Asphalt (HMA) plant mix. The results clearly indicated the variations in the rheological<br/>properties of bitumen recovered from different sources during the process of<br/>construction. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil Engineering