PDF全文阅读

王银行¹ ,  郑   亮² , 黄前龙^3 ,4 , 路凯冀^3 ,4 , 权   磊³

 

( 1. 河北工程大学 土木工程学院 , 邯郸   056038 ;  2.  温州交发大桥有限公司 ,  温州   325088 ;

3. 交通运输部公路科学研究院 , 北京   100088 ; 4.  中路高科  ( 北京)  公路技术有限公司 ,  北京    100088)

摘  要 :  为改善全再生水泥稳定碎石路用性能 , 提高再生集料在水泥稳定碎石基层中的利用率 ,  以粉煤灰和玄武岩纤维作为外掺物 , 通过力学和抗裂性能试验分析了外掺物对全再生水泥稳定碎石的性能影响 , 并结合微观试验分析了掺粉煤灰对全再生水泥稳定碎石的影响机理 。结果表明 : 掺入粉煤灰和玄武岩纤维均能在不同程度上提升其力学性能和抗裂性能 ,  由微观试验可知 , 粉煤灰在发生火山灰反应时生成钙钒石等水化物 , 填补试件内部孔隙 , 试件密实度增强 , 增强其路用性能 , 为废旧混凝土再生集料的高值化利用提供技术依据。

关键词 : 全再生 ; 水稳基层 ; 玄武岩纤维 ; 粉煤灰 ; 路用性能 ; 微观机理

中图分类号 : U414           文献标志码 : A           文章编号 :  1005- 8249  (2026)  03-0056-08

DOI :10. 19860/j. cnki. issn1005- 8249. 2026. 03. 010

 

Research on the Effect of Admixture Content on the Performance of

Fully Recycled Cement-Stabilized Macadam

WANG Yinhang1 , ZHENG Liang2 , HUANG Qianlong3 ,4 , LU Kaiji3 ,4 , QUAN Lei3

( 1. School of Civil Engineering , Hebei University of Engineering ,  Handan 056038 ,  China;

2. Wenzhou Communications Develop Bridge Co. , Ltd. , Wenzhou 325088 ,  China;

3. Research Institute of Highway Ministry of Transport , Beijing 100088 ,  China;

4. Zhong Lu Gao Ke  ( Beijing) Road Technology Co. , Ltd. , Beijing 100088 ,  China)

Abstract :  To improve the pavement performance of fully recycled cement stabilized macadam and enhance the utilization rate of recycled aggregate in cement stabilized macadam base layers , fly ash and basalt fiber were used as additives.   The effects of these additives on the performance of fully recycled cement stabilized macadam were analyzed through mechanical and crack resistance tests , and the mechanism of fly ash on fully recycled cement stabilized macadam was investigated using microscopic tests.   The results showed that the addition of fly ash and basalt fiber improved the mechanical properties and crack resistance of the material to varying degrees.   Microscopic  analysis  revealed  that  the  pozzolanic  reaction  of fly  ash  generated  hydration  products  such  as calcium silicate hydrate ( C-S-H) , which filled the internal pores of the specimens , increased compactness of the specimens , and enhanced the pavement performance of the specimens.   This study provides technical support for the high-value utilization of  recycled aggregates from waste concrete.

Key words :  fully recycled; cement stabilized macadam; basalt fiber; fly ash; pavement performance ; microscopic mechanism