ANCHORING TO ASPHALT
Fastco is proud to feature BoltHold asphalt anchors a family of anchors specifically designed for asphalt. The anchors are flush-mounted to the asphalt and provide a clean internal thread for attaching bolts to the anchors. All anchors are supplied with bolts and washers.
Installation requires drilling a hole and filling it with our inexpensive grout (EPX2 or AGE2*), then pushing the anchor in until it is flush with the asphalt surface. The grout hardens in 15 minutes allowing immediate installation. Full strength may take an hour. Anchors are rated for asphalt 2" (50mm) or thicker.
Here is a link to an article in American Fastener Journal titled Asphalt Anchors 101. It provides an extensive introduction to the do's and don't when it comes to fixing anything to asphalt.