Waste　concrete　and　waste　bricks　accounted　for　a　large　proportion　of　the　construction　and　demolition　waste.　Converting　them　into　recycled　construction　materials　has　become　a　promising　treatment　solution,　and　the　produced　recycled　coarse　aggregate　can　be　referred　to　as　recycled　brick-concrete　aggregate　(RBCA).　This　study　dealt　with　the　mechanical　properties　and　stress-strain　behavior　of　RBCA　concrete　through　thirty-nine　uniaxial　compression　tests.　The　experimental　parameters　encompassed　the　recycled　brick　aggregate　(RBA)　replacement　ratio,　concrete　strength,　and　stirrup　ratio.　The　results　indicated　that　the　RBCA　concrete　experienced　similar　compression　failure　process　compared　with　recycled　concrete　aggregate　concrete　(RAC),　but　the　brittleness　was　more　pronounced　in　the　post-peak　stage,　especially　when　the　RBA　replacement　ratio　exceeded　40　%.　The　RBCA　concrete　presented　a　decrease　in　elastic　modulus　and　an　increase　in　peak　strain　with　the　RBA　replacement　ratio.　The　stress-strain　curves　exhibited　brittle　characteristics　as　the　concrete　strength　increased,　while　stirrup　confinement　could　delay　the　peak　strain　and　ultimate　strain　of　RBCA　concrete,　and　effectively　improve　the　brittleness.　However,　as　the　RBA　content　exceeded　40　%,　the　improvement　effect　was　relatively　insignificant.　The　key　parameters　were　modified　by　considering　the　influence　of　RBA,　and　a　unified　calculation　formula　for　the　stress-strain　curves　of　unconfined　and　rectilinear　stirrup　confined　RBCA　concrete　was　proposed.　The　calculation　results　were　in　good　agreement　with　the　experimental　results,　which　can　provide　data　support　for　the　constitutive　research　of　RBCA　concrete　with　a　RBA　replacement　ratio　in　the　range　of　0　%-50　%.