The　aim　of　this　paper　is　to　investigate　the　adhesion　of　municipal　solid　waste　incinerator　bottom　ash　(MSWIBA)　and　limestone　to　asphalt　using　the　principles　of　surface　energy　theory.　MSWIBA　asphalt　mixes　are　known　for　their　satisfactory　water　stability,　with　adhesion　being　a　crucial　factor,　as　demonstrated　in　previous　freeze-thaw　splitting　tests.　Contact　angles　of　ground　MSWIBA　and　limestone　were　measured　using　a　capillary　rise　test,　eliminating　the　influence　of　material　surface　structure.　Subsequently,　adhesion　work　and　spalling　work　were　calculated　to　correlate　with　water-induced　damage.　The　results　showed　that　the　sequence　of　adhesion　work　was　fine　MSWIBA　＞　limestone　＞　coarse　MSWIBA,　while　the　sequence　of　spalling　work　was　coarse　MSWIBA　＞　limestone　＞　fine　MSWIBA.　The　adhesion　of　MSWIBA　asphalt　mixes　was　evaluated　using　the　water　boiling　test　image　method　to　validate　the　findings　of　surface　energy　theory.　In　both　asphalt　tests,　the　spalling　rate　followed　this　sequence:　coarse　MSWIBA　＞　limestone　＞　fine　MSWIBA.　The　Adhesion　index　ER　ranked　as　follows:　ER　(Fine　MSWIBA)　＞　ER　(limestone　)＞　ER　(coarse　MSWIBA).　These　results　suggest　that　the　water　stability　of　MSWIBA　asphalt　mixes　is　influenced　by　the　surface　energy　of　the　components.　Consequently,　indices　derived　from　surface　energy　theory　can　be　applied　in　formulating　and　predicting　the　properties　of　MSWIBA　asphalt　mixes.