How to determine geogrid reinforcement or crack resistance
Asphalt pavement cracking is one of the most common diseases in asphalt pavement in the world. No matter in the frozen area or in the non frozen area, the crack severity is different. The causes of asphalt pavement cracking and cracks in the form of a variety, but the main reason for the cracking of asphalt pavement, cracks can be divided into two categories, namely, the type of load cracks and non load cracks.The use of geotechnical materials to prevent asphalt pavement cracking effect is obvious. Selection of good resistance to erosion, dry shrinkage, temperature shrinkage coefficient is small, high tensile strength of semi-rigid material as the base, it is best to use the low temperature expansion coefficient of aggregate.High quality asphalt with good relaxation performance is used as the surface layer to ensure the penetration and ductility of asphalt. Certain additives or polymers should be used. In order to improve the low temperature crack resistance and high temperature stability of asphalt.
The old asphalt roadbed, will appear two different mutations in the direction of force wheel edge, a vertical load is the downward force of a horizontal tensile stress, long-term effect, and the influence of temperature and humidity, it is prone to fatigue cracking and subsidence layer to asphalt and asphalt overlay layer, caused by roadbed disease. According to the old asphalt roadbed fatigue cracking stress analysis by the line, in the asphalt layer and between concrete rigid base layer paving surface coating modified asphalt and self adhesive pressure sensitive adhesive of glass fiber geogrid in asphalt overlay and rigid concrete layer to form a good buffer zone, effective release of two mutations, prevent crack disease.
Highway such as half fill half dug, soft foundation zone to prevent the differential settlement, fill inspection batch to distinguish between, please know that. Thank you
