Low temperature cracking is a major distress in many regions with cold climates. It is believed that the excessive brittleness due to the increase in stiffness and decrease in the ability to relax stress leads to the build up of thermally induced stress and ultimately cracking of mixtures in pavements.
The crack materials can be used by Crack Sealing Machine such as asphalt mixtures can relax stress by viscous flow. Asphalt pavements are restrained from significant movement, thus thermally induced contraction can lead to significant stress build up in the pavement. Due to the time dependent behavior or crack materials, the higher the capability of the material to relax stress, the lower the thermal stress build up will be at a given temperature, and consequently the pavement can withstand lower temperature.
Thus, stress relaxation after finish Crack Sealing Machine construction has been considered an important factor in the thermal cracking resistance of asphalt pavement. Researchers also consider factors such as the rate of cooling, coefficients of expansion/contraction, glass transition temperature, shape of master curve at low temperature and the tensile strength to affect the critical cracking temperature, which will be helpful to Crack Sealing Machine construction.
