What Is Asphalt Made Of? The Science Behind Blacktop
Asphalt consists of 90-95% mineral aggregates—crushed stone, sand, and gravel—bound by 5-10% bitumen, a viscoelastic hydrocarbon derived from petroleum refining. The bitumen contains four molecular fractions (saturates, aromatics, resins, and asphaltenes) that determine viscosity, adhesion, and aging resistance. Aggregates provide structural integrity through mechanical interlock, while bitumen penetrates pores and forms physicochemical bonds with stone […]
The Complete Homeowner’s Guide to Asphalt Paving
Your asphalt driveway’s longevity depends on proper engineering—from subgrade preparation through final compaction. You’ll need to understand three asphalt types (HMA, WMA, cold mix), guarantee 8-12 inch excavation depth with 4-6 inch compacted base, and establish 2% minimum slope for drainage. Successful installation requires 95% compaction density, while maintenance involves sealcoating every 2-3 years and […]