Supplementary cementitious materials(SCM) or chemical admixtures(CA) blended in binder can mitigate the expansions due to alkali silica reaction(ASR) effectually. The factual effects of Li2CO3 or nitrate AN 1 against ASR were detected by means of long term alkali immersion at high temperature, and the inhibiting capacities of Li2CO3 or AN 1 were evaluated by accelerated mortar bars test(AMBT). AN 1 is nitrate, a new CA at a low price. In addition, the expansions of mortar bars blended with SCM only during the long term test were compared with those of Li2CO3 or AN 1 The results obtained are shown that, the three groups of mortar bars, including AN 1+SCM group, Li2CO3+SCM group and solo SCM group, exhibit good inhibition effect during AMBT which meets the discriminant criteria on qualified ASR inhibition of AMBT. Among the short term expansions of these three groups of mortar bars, the expansions of AN 1+SCM group as are same low as those of only SCM group, which are lower than the Li2CO3+SCM groups. However, during the long term test, the AN 1+SCM group and Li2CO3+SCM group exhibit outstanding inhibition which is still maintained at low expansions, while the single SCM group does not. Among the long term expansions of these three groups, the expansions of M2 mortar bars blended with Li2CO3+SCM are the lowest. Finally, the optimum AN 1 content in AN 1+SCM group is obtained and the threshold range of AN 1 content is recommended to take 075%125% by the mass of cement.