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Abstract

To study the application potential of ultra-fine iron tailings sand (UITS) as a road base material, this paper conducted unconfined compressive strength (UCS) tests and freezing and thawing tests to systematically analyze the effects of UITS content and cement content on the mechanical properties and durability of cement-stabilized UITS. Additionally, the scanning electron microscope (SEM) was employed to examine the evolution process of the microstructure. The results indicate that the appropriate UITS content can effectively improve UCS, with the optimal strength under the 20% UITS content and comparable strength to that of conventional cement-stabilized macadam under the 30% content. Increasing cement content helps enhance structural strength, but excessive UITS content damages the continuity of the microstructure, resulting in strength reduction. Additionally, the cement-stabilized UITS exhibits excellent frost resistance, with a strength retention rate exceeding 90%. SEM analysis reveals that appropriate UITS content promotes the production of stable hydration products, helping inhibit microcrack propagation caused by freezing and thawing and enhancing structural stability. This study provides solid technical support for the efficient application of UITS in road bases.

Publication Date

10-27-2025

DOI

10.14048/j.issn.1671-2579.2025.05.027

First Page

251

Last Page

260

Submission Date

November 2025

Reference

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