Frost　damage　is　one　of　the　common　degradation　processes　of　construction　materials.　Moreover,　the　reliable　predictions　of　internal　temperature　and　humidity　distributions　consist　of　the　vital　parameters　to　evaluate　the　degree　of　frost　damage　to　concrete　structures.　In　view　of　this　need,　this　paper　comprehensively　studied　the　variations　of　heat　and　moisture　transportation　in　low　temperature　concrete.　Firstly,　it　characterized　the　variations　of　three　pore　configurations　in　concrete　as　temperature　decreasing　to　quantify　two　opposing　effects,　that　is,　the　formation　of　ice　in　the　pores　and　the　crack　propagations　caused　by　excessive　ice　formation.　Then,　a　multiscale　material　model　was　proposed　to　estimate　the　effective　transport　coefficients　of　heat　and　moisture　in　concrete　with　considering　low　temperature　effect.　To　predict　the　internal　distributions　of　heat　and　moisture　in　low　temperature　concrete,　the　calculated　effective　coefficients　were　input　in　a　two-way　coupled　transport　analytical　model,　whose　results　were　verified　by　a　finite　element　model.　©　Tongji　University　Press　2024.