含重金属玻璃相作为冶金固废重要成分，其在水泥基材料中反应行为及对水化产物结构与性能的影响尚不明确。本文以不同锰含量玻璃相-水泥复合胶凝体系为研究对象，结合溶出试验、热重分析（TG）、X射线衍射（XRD）及纳米压痕等手段，系统研究了含锰玻璃相溶出特征及其对水化反应路径、C-S-H结构类型分布与微观力学性能的影响机制。结果表明，随着玻璃相中锰含量增加，Si与Al溶出显著增强，而Ca溶出变化有限，表明锰引入削弱了玻璃相硅铝网络结构，提高了其在碱性环境中反应活性。热重结果显示，掺锰体系在≤250 ℃区间的结合水含量整体降低，且400-600 ℃区间氢氧化钙相关失重维持在较低水平，说明水化过程中氢氧化钙未发生明显累积。XRD分析表明，各体系水化产物以非晶相为主，未检测到含锰新晶态相生成。纳米压痕结果表明，含锰玻璃相显著改变了C-S-H结构类型分布。与对照组中高密度C-S-H占主导不同，掺入含锰玻璃相体系中高密度C-S-H含量明显降低，而低密度与结构疏松C-S-H比例显著提高，弹性模量分布由高模量向中等模量区间集中，微观力学响应趋于均一。综合分析认为，含锰玻璃相通过增强硅铝元素供给、调控水化反应路径，驱动C-S-H结构发生类型重分配，而非促进水化产物的致密化。

Mn-bearing glass phases in metallurgical solid wastes play a crucial yet poorly understood role in regulating the microstructure of cementitious materials. This study investigates how Mn doping influences hydration mechanisms and C-S-H structure in composite cement pastes. Results show that Mn incorporation significantly enhances the dissolution of Si and Al while minimally affecting Ca release, indicating its role as a network modifier that increases glass reactivity under alkaline conditions. Thermal and XRD analyses confirm restrained portlandite accumulation and the dominance of amorphous phases, with no crystalline Mn-bearing products detected. Nanoindentation reveals a fundamental shift in C-S-H packing density: high-density C-S-H decreases substantially while low- and ultra-low-density C-S-H become predominant, leading to a more homogeneous micromechanical response. These findings demonstrate that Mn-bearing phases act as reaction-path regulators rather than densification promoters, steering C-S-H formation toward structurally redistributed, gel-like systems. This mechanistic insight provides a foundation for the targeted utilization of heavy-metal-containing solid wastes in designing low-carbon cementitious materials with tailored microstructures.