The utilization of sugarcane bagasse ash (SCBA) in alkali-activated materials (AAMs) is currently limited due to its subpar mechanical properties and the absence of a mix design approach. This study aimed to develop a high-strength, cost-effective, and low-carbon alkali-activated slag/bagasse ash (AASL/BA) composites through multi-objective optimization (MOO) models. The results showed that increasing SCBA content reduced the compressive strength of AASL/BA, particularly beyond 50 %. Moreover, elevating the SiO/NaO molar ratio to 1, along with a NaO content of 6 %, notably increased the compressive strength by 276 % and the proportion of C-(A)-S-H to 31 %. Furthermore, a comprehensive MOO model, considering SCBA content, SiO/NaO molar ratio, NaO dosage, cost index (CI) and environmental index (EI), was established. Optimal parameters were identified as SCBA content below 50 %, SiO/NaO molar ratio ranging from 0.5 to 1.0, and NaO dosage between 4 % and 6 % to achieve produce high-strength, cost-effective, and environmentally friendly AASL/BA. This work lays a solid groundwork for the sustainable design of AASL/BA materials.

中文翻译：

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低碳碱激发矿渣/甘蔗渣灰胶凝材料配合比设计及性能


由于其机械性能不佳且缺乏混合设计方法，甘蔗渣灰 (SCBA) 在碱活化材料 (AAM) 中的利用目前受到限制。本研究旨在通过多目标优化（MOO）模型开发高强度、经济高效且低碳的碱激活矿渣/甘蔗渣灰（AASL/BA）复合材料。结果表明，增加 SCBA 含量会降低 AASL/BA 的抗压强度，特别是超过 50%。此外，将 SiO/NaO 摩尔比提高到 1，NaO 含量提高到 6%，抗压强度显着提高 276%，C-(A)-S-H 比例显着提高到 31%。此外，还建立了综合考虑SCBA含量、SiO/NaO摩尔比、NaO用量、成本指数（CI）和环境指数（EI）的MOO模型。确定最佳参数为 SCBA 含量低于 50%、SiO/NaO 摩尔比范围为 0.5 至 1.0、NaO 用量为 4% 至 6%，以实现生产高强度、成本效益高且环境友好的 AASL/BA。这项工作为 AASL/BA 材料的可持续设计奠定了坚实的基础。