Asphalt　aging　causes　significant　distress　to　pavements,　which　risks　driving　safety　and　poses　unsustainable　repair　and　reconstruction　works.　Layered　double　hydroxide　(LDH)　is　a　promising　anti-aging　modifier　for　asphalt.　A　unique　benefit　of　LDH　is　its　potential　raw　material　-　bischofite,　a　fruitful　by-product　of　salt　lake　industries　and　is　often　casually　discarded.　In　this　work,　LDH　with　laminated　structure　and　high　crystallinity　was　synthesized　from　industrial　waste　bischofite,　and　the　silane　coupling　agent　A151　was　grafted　onto　the　LDH　surface,　which　remarkably　inhibits　the　adhesion　and　hydrophilicity　of　LDH　and　makes　it　more　compatible　with　asphalt.　Asphalt　becomes　hard　and　brittle　after　aging,　and　the　rheological　properties　deteriorate　considerably.　At　the　micro-level,　asphalt　aging　is　manifested　by　the　oxidation　of　light　components　to　heavy　ones,　the　increase　of　molecular　weight,　the　accumulation　of　macromolecules,　and　the　gelation　of　the　colloidal　structure.　Comparative　studies　indicate　that　the　LDH　synthesized　from　waste　bischofite　is　able　to　relieve　performance　deterioration,　component　oxidation,　molecular　polymerization,　and　structure　gelation　of　asphalt　during　aging.　Furthermore,　the　A151　surface　organic　modification　can　further　improve　the　effect　of　LDH　in　bolstering　the　anti-aging　property　of　asphalt.　These　favorable　results　provide　a　sustainable　approach　to　building　durable　pavements.