不同胶凝材料对碱激发绿色超高性能混凝土（GUHPC）力学性能和微观特性影响的研究

A Study on the Effect of Different Cementitious Materials on the Mechanical Properties and Microscopic Characteristics of Alkali-Activated Green Ultra-High Performance Concrete (GUHPC).

作者信息

Liao Zhiling, Xue Wanwen, Liao Lin, Hao Ruiqing, Shen Litao, Cui Dongxia

机构信息

Department of Underground Engineering, College of Mining Engineering, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, China.

Shanxi Transportation Technology R&D Co., Ltd., Taiyuan 030032, China.

出版信息

Materials (Basel). 2025 May 7;18(9):2163. doi: 10.3390/ma18092163.

DOI:10.3390/ma18092163

PMID:40363667

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12073335/

Abstract

This study investigates the influence of various cementitious materials on the performance of alkali-activated green ultra-high performance concrete (GUHPC). Alkali-activated GUHPC was prepared by substituting cement, quartz powder, and limestone powder with slag powder and fly ash. The mechanical properties, durability, hydration products, and microstructure were systematically analyzed. The results demonstrate that, with a cement dosage of 264 kg/m, the alkali-activated GUHPC incorporating 40% slag powder and 28% fly ash as cement replacements exhibited superior mechanical performance, achieving compressive and tensile strengths of 165.3 MPa and 7.7 MPa, respectively, after curing. The GUHPC displayed a dense internal structure with an extremely low porosity of 6.76%, along with superior impermeability and frost resistance compared to conventional UHPC. Slag powder exhibited high pozzolanic reactivity under alkali activation, enabling effective cement replacement. These findings provide valuable insights for the formulation of alkali-activated GUHPC.

摘要

本研究调查了各种胶凝材料对碱激发绿色超高性能混凝土（GUHPC）性能的影响。通过用矿渣粉和粉煤灰替代水泥、石英粉和石灰石粉来制备碱激发GUHPC。对其力学性能、耐久性、水化产物和微观结构进行了系统分析。结果表明，在水泥用量为264 kg/m³时，用40%矿渣粉和28%粉煤灰替代水泥的碱激发GUHPC表现出优异的力学性能，养护后抗压强度和抗拉强度分别达到165.3 MPa和7.7 MPa。与传统超高性能混凝土相比，GUHPC内部结构致密，孔隙率极低，仅为6.76%，且具有优异的抗渗性和抗冻性。矿渣粉在碱激发下表现出高火山灰活性，能够有效替代水泥。这些发现为碱激发GUHPC的配方设计提供了有价值的见解。