Potential of limestone powder to improve the stabilization of sulfate-contained saline soil

Ayazhan Bazarbekova, Chang Seon Shon, Aizhan Kissambinova, Jong Ryeol Kim, Dichuan Zhang, Sung Woo Moon

Research output: Contribution to journalConference articlepeer-review

Abstract

The geotechnical properties of soils differ from area to area, depending on the origin of soil, environmental conditions of a region, and soil treatment processes. As a subgrade material in pavement construction, however, the soil is required to meet specific standards for its engineering properties, such as plasticity, deformability, strength, and durability parameters. For this purpose, soil undergoes a stabilization process, in which it is treated with chemical additives. This paper studies the potential of limestone powder as a stabilizer in combination with cement in the stabilization of sulfate-contained saline soil. For this purpose, silty sand (A-2-4(0) according to AASHTO soil classification system) containing high sulfate and sodium contents was stabilized with 6% and 8% cement by dry weight, 2% and 4% limestone powder at fixed 4% cement content, and 2% limestone powder by dry weight at 6% cement content. Series of tests were performed to determine the improvement of geotechnical properties of these mixtures, such as unconfined compressive strength, Atterberg limits, three-dimensional (3-D) swelling, and dielectric constant. Experimental results show that the addition of limestone powder to the cement-treated saline soil decreases soil plasticity, increases maximum dry density, improves strength parameter, reduces volumetric swelling and moisture susceptibily of soil.

Original languageEnglish
Article number012016
JournalIOP Conference Series: Materials Science and Engineering
Volume1040
Issue number1
DOIs
Publication statusPublished - Jan 14 2021
Event5th International Conference on New Material and Chemical Industry, NMCI 2020 - Xiamen, Virtual, China
Duration: Nov 14 2020Nov 16 2020

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Fingerprint Dive into the research topics of 'Potential of limestone powder to improve the stabilization of sulfate-contained saline soil'. Together they form a unique fingerprint.

Cite this