This paper focuses on developing strain-hardening cementitious composites (SHCCs) with a new alkali-activated cement (AAC). The AAC was synthesized with a calcined solid waste, i.e., cutter soil mixing residue (CSMR), as a primary precursor. The test variables included the water-to-binder (w/b) ratio and silica modulus (M_s) of alkali activators. The binder chemistry, mechanical performances, and micromechanical parameters of the new SHCCs were investigated. Results demonstrated that a moderate w/b ratio with a high M_s value favored the trade-off between the quantity of alkali-activated hydrates, matrix properties, and fiber bridging behaviors, leading to optimal overall macroscopic performances of the composites. The SHCCs with proper mix design exhibited high tensile strain capacities of 4.43–5.13% and sufficient compressive strengths at 3 days (23.6–28.9 MPa) and 28 days (32.7–56.3 MPa). Compared to Portland cement-based SHCCs, the new SHCCs achieved comparable mechanical properties, while possessing around 20% less embodied energy and 40% less CO₂ emissions.

本文的重点是开发具有新型碱活化水泥 (AAC) 的应变硬化水泥复合材料 (SHCC)。AAC 是用煅烧固体废物，即切割土壤混合残渣 (CSMR) 作为主要前体合成的。测试变量包括碱活化剂的水与粘合剂 ( w / b ) 比和二氧化硅模量 ( M _s )。研究了新型 SHCCs 的粘合剂化学、机械性能和微机械参数。结果表明，中等w / b比和高M _s值有利于在碱活化水合物的数量、基体性质和纤维架桥行为之间进行权衡，从而实现复合材料的最佳整体宏观性能。具有适当混合设计的 SHCCs在 3 天 (23.6-28.9 MPa) 和 28 天 (32.7-56.3 MPa)表现出4.43-5.13% 的高拉伸应变能力和足够的抗压强度与基于波特兰水泥的 SHCC 相比，新型 SHCC 获得了相当的机械性能，同时减少了约 20% 的隐含能量和 40% 的 CO ₂排放量。