In　order　to　minimize　the　geological　disaster　triggered　by　expansive　soil,　and　promote　environmentally　sustainable　utilization　of　industrial-waste,　a　new　composite　cementing　material　was　proposed　for　the　expansive　soil　stabilization　based　on　paper/timber　industry　waste.　In　this　article,　laboratory　evaluation　is　conducted　to　establish　the　effect　of　curing-period　for　the　stabilized　expansive　soil　with　newly　proposed　composite　cementing　admixture　(CCA)　and　compared　it　with　lignosulphonate　(LS)　alone,　in　perspective　of　various　engineering　properties,　i.e.,　volume　change　behaviour,　hydraulic-conductivity　and　strength　parameters.　Results　showed　that　the　curing-period　has　a　notable　impact　on　the　performance　of　CCA.　For　the　soil　stabilized　with　CCA,　swelling　potential　was　completely　eradicated　after　seven　days　of　curing;　whereas,　the　strength　parameters　exhibited　improvement　till　twenty-eight　day　of　curing　with　some　variation　in　hydraulic-conductivity.　Conversely,　LS　treated　expansive　soil　remained　prone　to　potential　swelling　after　seven　days　of　curing.　Further,　LS　exhibited　an　insignificant　amelioration　of　hydraulic-conductivity　and　strength　parameters　with　the　curing-period.　Based　on　the　test　results,　it　is　concluded　that　the　CCA　stabilization　method　is　far　superior　than　LS　stabilization.　Moreover,　based　on　laboratory　evaluation,　twenty-eight　days　of　time　is　recognized　as　the　optimum　curing-period　for　CCA　treated　soil　to　achieve　better　engineering　properties.　©　Published　under　licence　by　IOP　Publishing　Ltd.