Concrete　is　a　geotechnical　material　characterized　by　cohesive-frictional　properties.　However,　there　is　currently　paucity　of　specialized　experimental　research　to　elucidate　these　features　and　their　potential　mechanisms.　This　study　addresses　this　gap　by　designing　and　conducting　72　experimental　sets　on　C30,　C40,　and　C50　concrete　to　investigate　their　cohesive-frictional　attributes.　Utilizing　two　comprehensive　conventional　triaxial　compression　tests　halted　upon　reaching　constant　stress　with　increasing　strain,　this　research　examines　the　mechanisms　and　corresponding　mechanical　behaviors　of　cohesion　and　friction.　During　the　initial　loading　test,　the　macroscopic　mechanical　behavior,　incorporating　both　cohesive　and　frictional　properties,　is　observed.　The　same　specimen　is　then　subjected　to　a　second　triaxial　test　under　identical　conditions,　predominantly　revealing　frictional　mechanical　behavior.　By　comparing　the　results　from　the　initial　and　subsequent　loadings　of　the　same　specimen,　the　cohesive　and　frictional　properties　of　concrete　are　decoupled,　allowing　for　the　determination　of　independent　deformation　and　strength　laws　for　cohesion　and　friction.　Based　on　the　experimental　findings,　this　study　thoroughly　discusses　the　deformation　mechanisms　and　strength　evolution　laws　of　both　properties,　elucidating　the　manifestation　mechanisms　of　cohesion　and　friction　in　concrete.　Furthermore,　a　comparative　analysis　with　the　nonlinear　unified　strength　criterion　and　the　strength　laws　on　the　triaxial　compression　meridian　plane　is　performed.　The　novel　experimental　method　proposed　in　this　study,　which　is　designed　to　investigate　the　cohesion-friction　properties　of　concrete,　has　successfully　decoupled　the　cohesive　strength　and　frictional　strength　of　concrete　for　the　first　time　from　an　experimental　perspective.　This　research　provides　a　foundational　experimental　basis　and　mechanistic　insight　into　the　fundamental　mechanical　properties　of　concrete　materials,　which　will　facilitate　the　establishment　of　cohesive-frictional　strength　theories　and　constitutive　models.