Advancing carbon neutrality in construction demands innovative, low-carbon, high-performance cement composites. This study introduces a water-stable graphene nanofluid admixture (GNA) at a 13 g/L concentration, addressing challenges in nanomaterial processing, dispersion, and cost for large-scale civil engineering. GNA can replace water in concrete casting, aligning with engineering practices. The interaction between GNA and the cement matrix enhances mechanical performance and microstructure evolution. Orthogonal experiments show significant improvements in concrete compressive and flexural strengths with optimized GNA ratios, boosting strengths by 25.92 % and 55.01 % after 28 d of curing compared to unmodified benchmarks. Introducing GNA in concrete reduces cement consumption by 20.6 %, leading to a notable 184 kg reduction in carbon emissions per ton of cement produced, promoting sustainability in the construction industry.

中文翻译：

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水基石墨烯纳米流体添加剂：可持续、低碳和高性能纳米碳改性胶凝材料的进展

推进建筑业的碳中和需要创新、低碳、高性能的水泥复合材料。这项研究介绍了一种浓度为 13 g/L 的水稳定性石墨烯纳米流体混合物 (GNA)，解决了大规模土木工程中纳米材料加工、分散和成本方面的挑战。 GNA 可以替代混凝土浇筑中的水，符合工程实践。 GNA 和水泥基体之间的相互作用增强了机械性能和微观结构的演变。正交实验表明，优化 GNA 比率后，混凝土的抗压和抗弯强度显着提高，与未修改的基准相比，养护 28 d 后强度分别提高了 25.92 % 和 55.01 %。在混凝土中引入 GNA 可减少 20.6% 的水泥消耗，每生产一吨水泥的碳排放量显着减少 184 公斤，促进建筑行业的可持续发展。