[1253] STRENGTH DEVELOPMENT IN SLAG CONCRETE USING C-S-H AND NITRATE/NITRITE ACCELERATORS AT VARIOUS CURING CONDITIONS
Keywords:C-S-H based accelerator、 blast-furnace slag、 compressive strength、 curing temperature
This study evaluates the performance of two hardening accelerators – C-S-H seeding-based ACX and nitrate/nitrite-based ACN – in slag concrete mixes with Ordinary (N) or High early strength (H) Portland cements under steam and standard curing conditions. Use of ACX or ACN enabled H slag concretes to achieve early age strengths comparable to N mixes under lower curing temperatures, allowing faster demolding times without affecting long-term strength. ACX consistently enhanced early-age strength across all conditions, while ACN showed delayed effectiveness at low temperature.