SYMPOSIA PAPER Published: 01 April 2012
STP154020120024

Using Ground Granulated Blast Furnace Slag with Seawater as Soil Additives in Lime-Clay Stabilization

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Clayey soils are not favorable foundation for road pavement, due to their low bearing capacity and remarkable swelling potential because of water intrusion. Many previous studies demonstrated that the engineering quality of clayey soils can be improved significantly by physical and chemical stabilization techniques, thereby making clayey soils suitable for use in embankments. The present study examined the use of granulated blast furnace slag in powder-form, commercial lime and seawater to improve the engineering properties of a low-plastic clay soil. Clay soil samples were reconstituted by adding various percentages (by weight) of GGBFS, lime, and seawater at optimum water contents, based on compaction tests results. The specimens were cured for 1, 7, and 28 days. Unconfined compression and California bearing ratio (CBR) tests were conducted. The results indicated that the unconfined compression strength of the clay samples (stabilized with 5 % lime, 3.33 % GGBFS and cured for 28 days) was more than eight times the initial strength of the untreated samples, reaching 2500 kPa with seawater. Soaked CBR values also increased to more than ten times the initial value.

Author Information

Kavak, Aydin
Dept. of Civil Engineering, Kocaeli Univ., Kocaeli, TR
Bilgen, Gamze
Alapli Vocational Collage, Zonguldak Karaelmas Univ., Zonguldak, TR
Capar, Omer, Faruk
Dept. of Civil Engineering, Zonguldak Karaelmas Univ., Zonguldak, TR
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Details
Developed by Committee: D18
Pages: 481–497
DOI: 10.1520/STP154020120024
ISBN-EB: 978-0-8031-7552-5
ISBN-13: 978-0-8031-7526-6