Analysis and Test Study on Reflective Cracking Prevention based on Interface Self Absorbing Composite Intermediate Layer in Semi-rigid Asphalt Pavement
To assess the cracking resistance effect of Interface Self Absorbing Composite, mechanics analysis and laboratory simulation test are adopted to verify the cracking variation under the cyclic loading, and the field test method is devised to test the anti-cracking effects of intermediate layers in the engineering section. The former shows that, ISAC has a good capacity of preventing the formation and development of reflective cracking. By setting displacement-meters in joints and strain-meters at the AC bottom, the latter shows that, both the ISAC intermediate layers with polyester cloth and with fiber glass grid as the upper strain absorption layer have a consistent variation of gap opening content and good cracking resistance effects. The actual anti-cracking effect of the fiberglass grid upper layer of the ISAC layer is better than the intermediate layers with the polyester cloth. The ISAC composite interlayer can relieve efficiently the base cracking influence, which provides a practical reference for controlling reflective cracking of asphalt pavements.
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