To　understand　the　behavior　and　characteristics　of　the　early-age　stress　of　cement　concrete　pavement,　field　monitoring　tests　were　carried　out　at　the　early　age　of　slabs　constructed　under　typical　environmental　conditions　in　Fujian　such　as　high　temperature　in　summer,　low　temperature　in　winter　and　constant　temperature　in　tunnel.　Non-stress　strain　of　temperature　and　humidity　was　removed　by　a　nonstress　cylinder　device.　Based　on　the　strain　histories　and　considering　the　creep　relaxation,　the　stress　state　and　histories　at　typical　positions　of　the　slabs　were　obtained　by　a　step-by-step　numerical　method.　The　early-age　temperature　field　and　curling　deformation　were　monitored.　The　relationship　between　early-age　stress,　temperature　and　curling　was　compared.　The　results　show　that　the　early-age　stress　of　pavement　has　three　stages,　namely,　compressive　stress,　tensile　stress　and　stress　fluctuating　cycle.　Stress　relaxation　stage　exists　in　the　initial　stage　of　stress　fluctuating　cycle.　Active　factors　effecting　the　early-age　stress　include　hydration　heat　release,　environmental　temperature,　curling　deformation　and　gravity,　and　their　combined　action.　The　effect　of　hydration　heat　is　significant　in　the　preliminary　stage,　while　the　effect　of　temperature　curling　is　significant　in　the　later　stages.　Passive　factors　effecting　the　early-age　stress　include　the　early-age　concrete　behavior,　structural　constraints　and　boundary　conditions.　The　early-age　stress　and　the　curling　of　pavement　constructed　in　summer　are　higher　than　that　constructed　in　winter.　Under　the　condition　of　stable　temperature　in　tunnel,　there　is　a　concave　built-in　curling　in　the　slab　with　the　corners　being　always　upward　due　to　humidity　shrinkage.　The　existence　of　stress　fluctuation　and　relaxation　process　in　the　early　age　causes　the　stress　in　the　initial　service　period　to　be　different　from　the　stress　in　later　service　period.　It　is　necessary　to　avoid　the　initial　adverse　conditions　that　may　be　inconsistent　with　the　design　state.　Copyright　©2021　Engineering　Mechanics.　All　rights　reserved.