Prediction of swelling behavior of expansive soils using modified free swell index, methylene blue and swell oedometer tests

Download

index.pdf

Date

2016

Author

Jaleh Forouzan, Amir

Metadata

Show full item record

Item Usage Stats

373
views

453
downloads

Expansive soils are recognized as problematic soils that impose several challenges for civil engineers. Such soils undergo significant volume change in case water penetrates into them, and they shrink as they lose moisture. Lightly-loaded engineering structures such as pavements, single story buildings, railways and walkways may experience severe damages when they are founded on such soils. Determination of expansive soils and quantifying their swelling potential and pressure caused by their expansion are essential in geotechnical engineering. Therefore it is necessary to develop models to predict swelling pressure and swelling potential of expansive soils. This research presents an experimental investigation of swelling behavior (swelling pressure and swelling potential) of expansive soils. The expansive soil specimens were prepared in the laboratory by mixing kaolinite and bentonite at different percentages. Atterberg limits, Grain size distribution, , Optimum water content, Maximum water content , Swelling pressure, Methylene blue value (MBV), vi Modified Free swell index (MFSI) and swell potential of the mixtures were assessed. The correlations between the swelling behavior of test samples and fundamental properties of test samples were studied. Additionally, the correlations between swelling behavior and MBV, MFSI and some of the index properties of test samples were investigated. These tests were repeated on the natural expansive soil samples and the results were evaluated. As final conclusion of this research, the values of swell pressure and swell potential of the test samples from the experimental investigation are compared with the predictive values of the same based on currently proposed and other suggested models.

Subject Keywords

Swelling soils., Soil chemistry., Soil mechanics.

URI

http://etd.lib.metu.edu.tr/upload/12619882/index.pdf
https://hdl.handle.net/11511/25540

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Stabilization of an expansive soil using phosphogypsum Özkan, İlyas; Çokça, Erdal; Department of Civil Engineering (2015) Expansive soils are a worldwide problem that poses several challenges for civil engineers. Such soils swell when given an access to water and shrink when they dry out. The most common and economical method for stabilizing these soils is using admixtures that prevent volume changes. Studies for treatment of expansive soils with phosphogypsum are very limited in literature. In this study the effect of phosphogypsum (PG) in reducing the swelling potential is examined. The expansive soil was prepared in the lab...
An Experimental study on the treatment of expansive soils by granular materials Hergül, Timuçin; Çokça, Erdal; Department of Civil Engineering (2012) Expansive soils are a worldwide problem that possesses various challenges for civil engineers. With increasing water content, they exhibit excessive volume changes, resulting in large horizontal and vertical stresses to the structures located or buried in these regions. The most common method to minimize this effect is to replace these types of clays around the proposed structure with nonexpansive soils. For the cases needing larger volume of replacement, either sidewalls or the foundations must be designed...
Improvement of expansive soils by using cement kiln dust Yılmaz, Mehmet Kağan; Çokça, Erdal; Department of Civil Engineering (2014) Expansive soils are a worldwide problem that poses several challenges for civil engineers. Such soils swell when given an access to water and shrink when they dry out. The most common and economical method for stabilizing these soils is using admixtures that prevent volume changes. In this study, effect of using cement kiln dust (CKD) in reducing the swelling potential was examined. The expansive soil was prepared in the laboratory by mixing kaolinite and bentonite. Cement kiln dust (CKD) was added to the s...
Stabilization of expansive soils using Bigadiç zeolite (boron by-product) Demirbaş, Güneş; Çokça, Erdal; Department of Civil Engineering (2009) Expansive soils are a worldwide problem that poses several challenges for civil engineers. Such soils swell when given an access to water and shrink when they dry out. The most common and economical method for stabilizing these soils is using admixtures that prevent volume changes. In this study the effect of using Bigadic zeolite (boron by-product) in reducing the swelling potential is examined. The expansive soil is prepared in the laboratory by mixturing kaolinite and bentonite. Bigadic zeolite (boron by...
Modeling of settlement in saturated and unsaturated municipal landfills Durmusoglu, Ertan; Corapcioglu, M.Yavuz; Tuncay, Kağan (American Society of Civil Engineers (ASCE), 2006-07-01) Municipal solid waste (MSW) landfills are not only used to dispose the refuse in most economical way but also utilized as a viable land in today’s waste management strategy. Settlement prediction is an important issue in order to guarantee the integrity of any postclosure structure on landfills. In this study, landfill settlement in saturated and unsaturated landfills is investigated by developing a one-dimensional mathematical model and performing numerical experiments. Under the saturated conditions, the ...

Citation Formats

A. Jaleh Forouzan, “Prediction of swelling behavior of expansive soils using modified free swell index, methylene blue and swell oedometer tests,” M.S. - Master of Science, Middle East Technical University, 2016.