Abstract:
Today, cracking asphalt pavement in low temperature is one of the obstacles
for protecting pavement in the cold climates. One of important factors in
extending of these types of cracking is cooling and heating temperature
cycles according to the changes in seasons. Therefore, this research
examines these types of asphalt cracking by considering asphalt mixtures
and using mechanics science. In this research, cold environmental
conditions were determined by making asphalt gyratory asphalt samples and
fracture test in -15°C to study the effect of asphalt mixtures important
parameters, it means asphalt construction materials textile on fracture
resistance of samples. On the other hand, simultaneous effect of two
parameters on asphalt fracture resistance was examined by considering the
effect of freezing and thawing cycles, as well as using siliceous and
calcareous materials.
Machine summary:
Analysis Fracture Behavior of Asphalt Mixtures in Freezing and Thawing Cycles Conditions Using Linear Elastic Fracture Mechanic (LEFM) Technic Yousef Reza Bayrami1 and Shams Nobakht Dudran2* 1Department of Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran 2Iran University of Science & Technology, Tehran, Iran Original Article: Received 10 Sep. 2016 Accepted 18 Oct. 2016 Published 28 Nov. 2016 ABSTRACT Today, cracking asphalt pavement in low temperature is one of the obstacles for protecting pavement in the cold climates.
In this research, cold environmental conditions were determined by making asphalt gyratory asphalt samples and fracture test in -15°C to study the effect of asphalt mixtures important parameters, it means asphalt construction materials textile on fracture resistance of samples.
Both samples made by calcareous and siliceous materials were tested in two dry and saturated modes to study the effect of thermal condition on tests results.
As it is observed in figure (5), the prepared asphalt mixtures in constant thermal conditions without using additives in calcareous samples have 15% more resistance than the siliceous samples.
According to figure (8), siliceous modified samples with antistripping have similar fracture resistance in both dry and saturated modes under the cyclic condition.
Conclusion According to experiments and analyses in this research, the summary of the obtained results show that the modified samples with antistripping under the constant thermal condition have more fracture resistance for calcareous materials than the prepared siliceous samples.