Shear Strength of Stabilized Clay Treated with Soda Residue and Ground Granulated Blast Furnace Slag
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 3
Abstract
This study examined soda residue (SR) and ground granulated blast furnace slag (GGBS) to stabilize soft soil in comparison with using portland cement (PC). The shear strength of samples was measured to study the additive dosage and curing time effect on the additive performance. Microstructural investigations were conducted using pH, thermogravimetric analyses, X-ray diffraction, and scanning electron microscopy to correlate with shear strength of the treated soil. The results indicated that the presence of SR can increase the shear strength of soft soil and the optimum content is approximately 30% to yield the highest cohesion. Soil stabilization using a mixture of SR and GGBS increased shear strength as GGBS content and curing time increased. Shear strength of SR-GGBS-stabilized soil was close to that of the corresponding SR-PC-stabilized soil after curing for 28 days. The main hydration products detected for SR-GGBS-stabilized soil included calcium silicate hydrates, calcium aluminate hydrates, ettringite, and calcium chloroaluminate hydrates. The results will contribute to the use of SR and GGBS as effective stabilizers for soft soil.
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Acknowledgments
Financial support for this research was obtained from the National Natural Science Foundation of China (Grant No. 41772332), Outstanding Youth Scientific Innovation Team Project of Universities in Hubei Province (Grant No. T201605), and Major Project of Technical Innovation in Hubei Province (Grant No. 2017ACA090).
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 3 • March 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jan 18, 2018
Accepted: Sep 5, 2018
Published online: Dec 28, 2018
Published in print: Mar 1, 2019
Discussion open until: May 28, 2019
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