For　the　utilization　of　waste　bischofite　from　salt　lakes,　the　waste　bischofite　was　utilized　to　synthesize　layered　double　hydroxide　(LDH)　by　hydrothermal　method,　and　the　synthesized　LDH　was　further　organically　intercalated　with　3,5-Di-tert-butyl-4-hydroxyphenylpropionic　acid　(antioxidant,　DPA)　by　anion　exchange　methods.　Then,　the　synthesized　LDH　and　DPA　intercalated　LDH　(DPA-LDH)　were　applied　to　improve　the　ageing　resistance　of　asphalt.　X-ray　diffraction　and　Fourier　transform　infrared　spectroscopy　manifested　that　LDH　and　DPA-LDH　had　been　successfully　synthesized.　After　DPA　intercalation,　the　adhesive　aggregation　among　LDH　particles　was　obviously　ameliorated,　and　the　contact　angle　of　LDH　increased　from　31.3°　to　77.9°,　the　hydrophilicity　of　LDH　was　significantly　decreased.　The　effect　of　LDH　and　DPA-LDH　(3　%　by　weight　of　asphalt)　on　rheological　properties,　chemical　constituents　and　molecular　weight　of　asphalt　before　and　after　ageing　were　comprehensively　studied.　The　high-temperature　performance　grade　of　asphalt　increased　from　PG64　to　PG70　with　the　addition　of　LDH　and　DPA-LDH,　which　indicated　that　LDH　and　DPA-LDH　could　enhance　the　high-temperature　performance　of　asphalt.　After　ageing,　the　high　and　low-　temperature　performance　of　asphalt　worsened,　the　colloidal　stability　index　(CI)　decreased　from　3.548　to　1.844,　the　gel　index　(GI)　was　48　%,　the　colloidal　structure　tended　to　gel　structure,　the　molecular　weight　(Mw)　enlarged　from　3387　to　4101　(the　Mw　growth　rate　of　21　%).　LDH　could　restrain　the　destruction　of　ageing　on　rheological　properties,　the　colloidal　structure　gel　of　asphalt　(the　GI　of　37.4　%)　and　molecular　weight　(the　Mw　growth　rate　of　13　%)　of　asphalt,　and　strengthen　the　ageing　resistance　of　asphalt.　Furthermore,　the　enhancement　of　DPA-LDH　(the　GI　of　16.7　%　and　the　Mw　growth　rate　of　6　%)　on　the　ageing　resistance　of　asphalt　was　more　superior　than　LDH.　The　result　showed　that　the　synthesized　DPA-LDH　exhibited　outstanding　performance　in　improving　the　ageing　resistance　of　asphalt,　which　was　beneficial　to　the　long-life　pavement　and　the　utilization　of　abandoned　bischofite　from　salt　lakes.　©　2023　Elsevier　Ltd