To　investigate　the　impact　of　synergistic　effect　between　limestone　powder　and　supplementary　cementitious　materials　containing　aluminate　phase　on　carbonation　resistance　of　concrete,　two　kinds　of　supplementary　cementitious　materials　containing　aluminate　phase　and　limestone　powder　were　selected　to　replace　cement　in　different　proportion,　and　the　hydration　products　and　microstructure　were　measured　by　thermogravimetric　analysis,　XRD　and　mercury　intrusion　porosimetry.　The　results　showed　that　incorporation　of　limestone　powder　reduce　the　carbonation　resistance　of　concrete.　The　carbonation　depth　of　concrete　was　minimal　when　the　content　of　limestone　powder　was　approximately　10%.　However,　when　limestone　powder　and　supplementary　cementitious　materials　containing　aluminate　phase　were　mixed,　they　reacted　to　form　calcium　carboaluminate,　which　increase　the　volume　of　solid　phase,　optimize　the　pore　structure,　and　their　synergistic　effect　improved　the　carbonation　resistance　of　concrete.　When　the　limestone　powder　amount　was　5%-15%,　and　the　fly　ash　amount　was　less　than　10%　or　the　slag　amount　was　10%-30%,　the　carbonation　depth　of　concrete　was　lowest.　©　2018,　Materials　Review　Magazine.　All　right　reserved.