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胡淑婷 , 石振武

 

(东北林业大学 , 哈尔滨    150040)

摘  要: 为提升水泥稳定再生碎石在高速公路基层中的应用性能 , 探讨了掺入粉煤灰与水泥协同作用的增强效果 。通过系统测试不同粉煤灰掺量下再生碎石混合料的路用性能 , 分析了粉煤灰掺量对再生碎石混合料强度性能 、干缩变形 、抗冻性能 、疲劳寿命的影响规律 。结果表明 : 随粉煤灰掺量增加 , 再生碎石混合料的各项路用性能指标均呈先增强后减弱趋势 ; 粉煤灰掺量为 12% ~ 16%范围时 , 各项路用指标均优于 6%水泥稳定再生碎石 ; 粉煤灰掺量为 16%时 , 7 d 无侧限抗压强度 、抗压回弹模量 、干缩性能 、抗冻性能达到最优 , 掺量从 12%增加至 16%性能增幅显著减缓 ; 粉煤灰掺量为 12%时 , 弯拉强度 、疲劳寿命表现最佳 ; 采用 12%粉煤灰+4%水泥稳定再生碎石可满足高度公路基层技术指标要求 , 且具备良好的经济性 。研究成果可为再生碎石作为高速公路基层材料推广提供理论依据。

关键词: 粉煤灰 ; 水泥 ; 再生碎石 ; 高速公路基层 ; 强度性能 , 耐久性能

中图分类号: U416      文献标志码: A      文章编号: 1005-8249 (2026) 05-0001-07

DOI:10. 19860/j. cnki. issn1005-8249. 2026. 05. 001

HU Shuting, SHI Zhenwu

(Northeast Forestry University, Harbin 150040, China)

Abstract : To enhance the performance of cement-stabilized recycled crushed stone in road subbases,

 the reinforcing effect of fly ash synergistically interacting with cement was investigated.  Through 

systematic testing of the road performance of recycled aggregate mixtures at different fly ash dosages,

 the influence patterns of fly ash dosage on the strength performance, dry shrinkage deformation, 

freeze-thaw resistance, and fatigue life of the recycled aggregate mixtures were analyzed. Results 

indicate: As fly ash content increases, all road performance indicators of recycled aggregate mixtures 

first enhance then weaken; within the 12%- 16% fly ash range, all performance metrics surpass those 

of cement-stabilized recycled aggregate with 6% cement content. At 16% fly ash content, the 7-day 

unconfined compressive strength, compressive rebound modulus, dry shrinkage performance, and 

freeze - thaw resistance reached optimal values, with performance gains significantly slowing when 

the fly ash content increased from 12% to 16%.  At 12% fly ash content, flexural strength and fatigue

 life exhibited the best performance.  The combination of 12% fly ash and 4% cement-stabilized 

recycled crushed stone meets the technical requirements for highway base layers while offering

 favorable economic benefits. These findings provide a theoretical basis for promoting recycled

 crushed stone as a base layer material for expressways.

Key words: fly ash; cement; recycled crushed stone; expressway grassroots; strength performance, 

durability performance

项目来源 : 黑龙江省交通运输厅重点科技项目 (J-20181215; HX-FW-20120100)。作者简介 : 胡淑婷 (1999—) , 女, 硕士研究生, 研究方向 : 高速公路混凝土。

通信作者 : 石振武 (1963—) , 男, 博士, 教授, 博士生导师, 研究方向 : 工程项目管理。

收稿日期 : 2025-12-01