|Table of Contents|

Advances in application research of fly ash-stabilized soil for highway engineering(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2026年01期
Page:
1-22
Research Field:
道路工程
Publishing date:

Info

Title:
Advances in application research of fly ash-stabilized soil for highway engineering
Author(s):
HUI Ying-xin1; 2; 3;  ZHANG Ru-jiang1;  YUAN Dong-dong4;  MEN Guang-yu2; YUAN Hua-qiang1;  GU Shi-zhou1
(1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, Ningxia, China; 2. Ningxia Communications Construction Co., Ltd., Yinchuan 750001, Ningxia, China; 3. Ningxia Solid Waste Resources Road Comprehensive Utilization Technology Engineering Research Center,Ningxia Communications Construction Co., Ltd., Yinchuan 750001, Ningxia, China; 4. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China)
Keywords:
road engineering;  fly ash;  review;  highway;  soil improvement;  pozzolanic reaction;  solid waste resource utilization;  prospect
PACS:
U416
DOI:
10.19721/j.cnki.1671-8879.2026.01.001
Abstract:
Through systematic review and analysis of existing literature, clarifies the research hotspots in the field of fly ash for highway soil improvement were clarified, the safety pretreatmenttechniques for fly ash were summarized, and the research progress of emerging technologies were systematically reviewed such as single fly ash incorporation, composite improvement, alkali-activated fly ash, carbonized fly ash, and nano-modified fly ash in highway soil improvement. From the perspectives of mechanical properties, durability, microstructural morphology, and reaction mechanisms, the effects of different improvement methods were thoroughly analyzed, and the key factors influencing the performance of fly ash-improved systems were summarized. The findings indicate that fly ash can significantly enhance the performance of highway soils, and further optimization can be achieved through composite improvement and geopolymer synergistic technologies, demonstrating broad application prospects in highway engineering. Current research still faces challenges such as limited methods for activating fly ash reactivity, insufficient synergistic utilization of multi-source solid waste, unclear mechanisms under coupled environmental-loading conditions, lack of monitoring for long-term performance evolution and risks of improved soils, and restricted expansion of application scenarios. Future research should focus on developing multi-component composite activation systems and intelligent modification technologies, exploring the synergistic mechanisms of multi-source solid wastes and their engineering applications, constructing multi-scale evaluation models for the long-term performance evolution of fly ash-improved soils, deepening the study of soil improvement mechanisms under multi-factor interactions, and expanding large-scale application scenarios of fly ash in highway subgrade construction. This research will provide technical support for solid waste resource utilization and the green and low-carbon development of transportation infrastructure.3 tabs, 18 figs, 100 refs.

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Last Update: 2026-02-20