Alkali-activated　slag　mortar　was　prepared　using　quicklime　and　sodium　carbonate　(the　molar　ratio　of　1:1)　as　activators.　The　effect　of　quicklime　and　sodium　carbonate　content　(namely　Na2O　content,　2.　5%,　4.　5%,　6.　5%　and　8.　5%)　and　slag　activity　(depending　on　the　chemical　composition　and　fineness,　etc.)　on　the　splitting　tensile　strength,　strain　of　interior　steel　ring,　circumferential　tensile　stress　and　cracking　resistance　of　alkali-activated　slag　mortars　(AM)　was　investigated.　It　is　found　that　the　cracking　resistance　of　Portland　cement　mortars　is　better　than　that　of　AM;　with　the　increase　of　Na2O　content,　the　splitting　tensile　strength　and　cracking　resistance　increase　firstly　and　then　decrease.　When　the　Na2O　content　is　6.　5%,　the　cracking　resistance　is　the　best;　with　the　increase　of　slag　activity,　the　splitting　tensile　strength　of　AM　increases,　but　its　cracking　resistance　decreases.　©　2022　Cailiao　Daobaoshe/　Materials　Review.　All　rights　reserved.