摘要
The present work investigated the properties of the commonly used <span style="font-family:Verdana;font-size:12px;">Butimen</span><span style="font-family:Verdana;font-size:12px;"> for road construction in Nigeria (60/70 pen.) for normal temperature and climate Effect. The laboratory tests conducted were penetration, softening point, viscosity, ductility test </span><span style="font-family:Verdana;font-size:12px;">and</span><span style="font-family:Verdana;font-size:12px;"> flash and fire point test based on the ASTM standards. The result indicates a decrease in stiffness of bitumen with an </span><span style="font-family:Verdana;font-size:12px;">increase</span><span style="font-family:Verdana;font-size:12px;"> in temperature, with a </span><span style="font-family:Verdana;font-size:12px;">decrease</span><span style="font-family:Verdana;font-size:12px;"> in penetration of bitumen by 85.5% when tested between 25<span style="font-family:Verdana;">°</span>C to 43.2<span style="font-family:Verdana;">°</span>C and also the Ductility decreases with increase in temperature by 54.9% between 25<span style="font-family:Verdana;">°</span>C and 43.2<span style="font-family:Verdana;">°</span>C. The viscosity result shows a decrease in viscosity with an </span><span style="font-family:Verdana;font-size:12px;">increase</span><span style="font-family:Verdana;font-size:12px;"> in temperature, therefore at </span><span style="font-family:Verdana;font-size:12px;">higher</span><span style="font-family:Verdana;font-size:12px;"> temperature Bitumen is likely to flow.</span>
The present work investigated the properties of the commonly used <span style="font-family:Verdana;font-size:12px;">Butimen</span><span style="font-family:Verdana;font-size:12px;"> for road construction in Nigeria (60/70 pen.) for normal temperature and climate Effect. The laboratory tests conducted were penetration, softening point, viscosity, ductility test </span><span style="font-family:Verdana;font-size:12px;">and</span><span style="font-family:Verdana;font-size:12px;"> flash and fire point test based on the ASTM standards. The result indicates a decrease in stiffness of bitumen with an </span><span style="font-family:Verdana;font-size:12px;">increase</span><span style="font-family:Verdana;font-size:12px;"> in temperature, with a </span><span style="font-family:Verdana;font-size:12px;">decrease</span><span style="font-family:Verdana;font-size:12px;"> in penetration of bitumen by 85.5% when tested between 25<span style="font-family:Verdana;">°</span>C to 43.2<span style="font-family:Verdana;">°</span>C and also the Ductility decreases with increase in temperature by 54.9% between 25<span style="font-family:Verdana;">°</span>C and 43.2<span style="font-family:Verdana;">°</span>C. The viscosity result shows a decrease in viscosity with an </span><span style="font-family:Verdana;font-size:12px;">increase</span><span style="font-family:Verdana;font-size:12px;"> in temperature, therefore at </span><span style="font-family:Verdana;font-size:12px;">higher</span><span style="font-family:Verdana;font-size:12px;"> temperature Bitumen is likely to flow.</span>
