3-mercaptopropyltriethoxysilane　(KH580)　surface　organic　layered　double　hydroxides　(LDHs)　was　synthesized　to　simultaneously　bolster　the　anti-ageing　property　of　SBS　copolymer　modified　bitumen　(SMB).　The　X-ray　diffraction　and　X-ray　photoelectron　spectroscopy　proved　that　the　KH580　was　successfully　grafted　on　the　surface　of　LDHs　(KH-LDHs).　After　KH580　surface　organic　modification,　the　aggregation　and　hydrophilicity　of　LDHs　were　significantly　restrained,　and　the　UV　absorbing　capacity　was　concurrently　enhanced.　Compared　with　LDHs,　KH-LDHs　exhibited　superior　compatibility　within　SMB　and　could　improve　the　high-temperature　performance　and　elastic　behavior　of　SMB　much　better.　After　ageing,　SMB　became　stiff　and　crisp,　the　rheological　properties　worsened,　and　the　number　of　oxygen-containing　groups　(C[dbnd]O　and　S[dbnd]O)　in　SMB　experienced　a　considerable　rise.　Simultaneously,　SBS　copolymer　also　degraded　during　the　ageing　process,　further　deteriorating　the　performance　of　SMB.　LDHs　was　able　to　inhibit　the　ageing　repercussions　on　the　rheological　properties,　chemical　structure　and　SBS　copolymer,　thus　bolstering　both　the　anti-ageing　property　of　SMB　and　the　degradation　resistance　of　SBS　copolymer.　Furthermore,　the　role　of　LDHs　would　be　dramatically　strengthened　by　KH580　surface　organic　modification.　©　2025　Elsevier　Ltd