硅酸盐通报2026，Vol.45Issue(5)：1559-1570,12.DOI:10.16552/j.cnki.issn1001-1625.2025.1000
纳米材料与纤维改性洞渣混凝土力学性能研究
Research on Mechanical Properties of Nanomaterial and Fiber Modified Tunnel Spoil Concrete
摘要
Abstract
To enhance the mechanical properties of tunnel spoil concrete and promote the sustainable utilization of mineral waste,an orthogonal test was conducted to investigate the effects of varying contents of nano-silica,fly ash,and basalt fibers(with lengths of 6 and 12 mm)on the mechanical properties of tunnel spoil concrete.Based on macro-and micro-scale test results,the optimal mix proportion was determined,and the mechanisms of influences of these materials on the concrete's performance were clarified.The results indicate that the overall properties of the modified tunnel spoil concrete reach their optimum with the incorporation of 1%(mass fraction)nano-silica,10%(mass fraction)fly ash,0.15%(volume fraction)of 6 mm basalt fiber,and 0.1%(volume fraction)of 12 mm basalt fiber.Compared with the unmodified tunnel spoil concrete,the compressive strength and splitting tensile strength of the modified concrete increase by up to 20.0%and 26.3%,respectively.Fly ash and nano-silica promote the formation of C-S-H gel during the hydration process.The fibers enhance the splitting tensile performance,ultimately improving both the mechanical properties and failure mode of the concrete.关键词
纳米二氧化硅/玄武岩纤维/洞渣混凝土/力学性能/正交试验/微观结构Key words
nano-silica/basalt fiber/tunnel spoil concrete/mechanical property/orthogonal test/microstructure分类
建筑与水利引用本文复制引用
杨泰华,王公略,罗旭峰,周哲,屠名,刘滨,刘学伟..纳米材料与纤维改性洞渣混凝土力学性能研究[J].硅酸盐通报,2026,45(5):1559-1570,12.基金项目
国家自然科学基金(12572462) （12572462）
湖北省自然科学基金杰出青年项目(2022CFA084) （2022CFA084）
