Subgrade stabilisation mixtures with EAF steel slag: an experimental study followed by field implementation

This study investigates the viability of using electric-arc-furnace steel slag (EAF SS)-blast furnace slag (BFS) and EAF SS-Class C fly ash (FA) mixtures as a replacement for lime or cement in subgrade stabilisation applications and describes the implementation and performance of the selected mixtur...

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Bibliographic Details
Published inThe international journal of pavement engineering Vol. 23; no. 6; pp. 1754 - 1767
Main Authors Yildirim, Irem Zeynep, Prezzi, Monica
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 12.05.2022
Taylor & Francis LLC
Subjects
Atterberg limits
Base course
blast furnace slag
Blast furnace slags
Class C fly ash
Compressive strength
Cone penetration tests
dynamic cone penetration test
EAF steel slag
Fly ash
implementation
Laboratory tests
Mixtures
Quality control
Slag
Soil compaction
Soil lime
Soil mixtures
Soil testing
Steel
subgrade stabilisation
Subgrades
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Summary:This study investigates the viability of using electric-arc-furnace steel slag (EAF SS)-blast furnace slag (BFS) and EAF SS-Class C fly ash (FA) mixtures as a replacement for lime or cement in subgrade stabilisation applications and describes the implementation and performance of the selected mixture in the field. In order to decide on the proportions of EAF SS, BFS and Class C FA to be used in the field, tests were performed to obtain the Proctor compaction curves and the Atterberg limits (AL) of mixtures of soil-7% EAF SS-3% BFS and soil-7% EAF SS-3% Class C FA; in addition, the one dimensional swelling behaviour of samples prepared with these mixtures was monitored for over two months. The strength of the stabilised mixtures was determined through unconfined compressive (UC) strength tests. Based on the laboratory test results, the soil-7% EAF SS-3% Class C FA mixture was selected and implemented as a subgrade material in a pavement project in Indiana. Field subgrade compaction quality control was done by performing Dynamic Cone Penetration Tests (DCPT) and Nuclear Gauge (NG) density tests. No cracks or signs of distress were observed on the surface of the subgrade before and after placement of the base course and concrete.
ISSN:1029-8436
1477-268X
DOI:10.1080/10298436.2020.1823389