混和材料４/軽量コンクリート

[1253] C-S-Hおよび硝酸／亜硝酸塩系硬化促進剤を用いたスラグコンクリートの各種養生条件における強度発現性

チャンドラキランビヌコンダ¹, 井元晴丈¹, 小泉信一¹, 尾田健太¹ (1.シーカ・ジャパン)

キーワード：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.