Mechanical and Durability Properties of Poorly Graded Sandy Soil Stabilized with Activated Slag
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 1
Abstract
This study focused on the evaluation of the mechanical and durability aspects of stabilized poorly graded sandy soil by activated blast furnace slag cements (ASCs) with three different activators with combinations of and NaOH (PN), and (PC), and and (PS). Type of activators, binder percentage, and curing time were investigated as parameters. The results of unconfined compression strength (UCS) of samples in a constant amount of binder/soil (5-wt%) showed an increase from 0.75-MPa for ordinary portland cement (OPC)-based samples to 2.28, 2.63, and 4.5-MPa for PC-, PN-, and PS-based samples, respectively. Due to its high UCS sample value, the activator considered most effective is PS based. The formed gel between the soil’s particles results from the dense microstructure and fewer voids in the sample suggests a higher interaction level between soil and binder. PS- and PC-based binders showed more ductility than OPC-based stabilized soil. Moreover, ASC samples showed better soundness than OPC samples, due to less volume changes, stronger bonds between soil particles, binder matrix, and absence of destructive expansion.
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Journal of Materials in Civil Engineering
Volume 32 • Issue 1 • January 2020
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©2019 American Society of Civil Engineers.
History
Received: Oct 17, 2018
Accepted: Jun 28, 2019
Published online: Oct 24, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 24, 2020
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