Experimental Study on Road Performance and Durability of Iron Tailings-Steel Slag Aggregate Micro-Surface Mixture

Abstract

Abstract: Aiming at a series of problems such as insufficient road surface durability at the existing micro-surface, low comprehensive utilization rate of tailings and environmental pollution caused by long-term stacking of steel slag, the feasibility of replacing traditional high quality aggregate with steel slag and iron tailings with different particle sizes was discussed. The material characteristics of steel slag and iron tailings were revealed by material analysis technology, physical and mechanical properties test. The micro-surface mixture with iron tailings-steel slag aggregate was prepared. Taking cohesion, wear resistance, water stability, slip resistance and rutting resistance of the prepared mixture as indicators,the durability of the micro-surface mixture mixed with steel slag and iron tailing was evaluated by cohesion test, wet wheel wear test, freeze-thaw cycle wet wheel wear test, long-term slip resistance test and wheel rutting deformation test.The results show that iron tailings and steel slag have significant enhancing effect on the wear resistance, long-term slip resistance and rutting resistance of the micro-surface mixture. The incorporation of iron tailings adversely affects the cohesion and water damage resistance of mixture, and the impact increases when the dosage is 20% (mass fraction), while the addition of steel slag effectively improves the problem of poor adhesion caused by iron tailings. Using steel slag coarse aggregate instead of traditional aggregate, and adding 15% (mass fraction) iron tailings fine aggregate can effectively improve the durability of micro-surface pavement, so as to prolong the service life of micro-surface pavement.

Key words: road engineering, micro-surface mixture, steel slag, iron tailing, durability, pavement performance

CLC Number:

U414

LIU Mingyang, ZHOU Bin, YAN Feng, CHEN Longjiang, HOU Meiqing. Experimental Study on Road Performance and Durability of Iron Tailings-Steel Slag Aggregate Micro-Surface Mixture[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(9): 3176-3189.

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