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| | ARTICLES | Am. J. innov. res. appl. sci. Volume 11, Issue 1, Pages 50-54 (July 2020) |
| Research Article |
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American Journal of innovative
Research & Applied Sciences
Research & Applied Sciences
ISSN 2429-5396 (Online)
OCLC Number: 920041286
OCLC Number: 920041286
| HOME || ABOUT US || ARCHIVES || AIMS AND SCOP || AUTHORS || REVIEW|| SUBMIT MANUSCRIPT || EDITORIAL BOARD || CONTACT US |
| JUJY | VOLUME 11 | N° 1 | 2020 |
| Info-AJIRAS-® Journal ISSN 2429-5396 (Online) / Reference CIF/15/0289M |
American Journal of Innovative Research & Applied Sciences
Authors Contact
*Correspondant author and authors Copyright © 2020:
| Norah Nizam 1* | and | Rami Ousta 2 |
Affiliation.
1. Tishreen University | Postgraduate Student at Department of Geotechnical Engineering, Faculty of Civil Engineering | LATTAKIA | SYRIA |
2. Tishreen University | Associate Professor, Department of Geotechnical Engineering | Faculty of Civil Engineering | LATTAKIA | SYRIA |
This article is made freely available as part of this journal's Open Access: ID | Nizam-Ref.1-ajira030720 |
ABSTRACT
Background: Using lime in expansive soil treatments have been proven effective from the many researches on this topic, different methodologies were employed In order to achieve the best exploitation of lime as a cost effective material. The methods such as mixing, injection and lime columns or micro lime piles. Several studies have been conducted on the last two methods and were proven effective and confirmed the diffusion of lime within the soil, but some other studies have indicated a decrease in the resistance of these columns over time, which prompted many researchers to find different methods that increase the long-term resistance of lime columns. These studies were limited to measuring the change in resistance and neglected the study of the changes of physical properties of the soil surrounding the column due to lime diffusion, considering the fact that adding a strengthening material to the column decreases the amount of lime used. Methods: This research is based on a laboratory model in which a clay bed of expansive soil is formed within a cylindrical metal mold with a diameter of 30 cm and a height of 30 cm. In the center of the clay bed the lime-gravel column was implemented. The mold was left for curing periods of (7, 28, 54, and 112), and for each treatment period, soil samples were extracted at radial distances from the column starting from one times the column diameter to five times diameter in the form (1D, 2D, 3D, 4D, 5D). The extracted samples were tested for liquid limit, free swelling and direct shear. Results: The results showed a clear decrease in the values of LL and free swell index as well as an increase in shear resistance by increasing the treatment period and decreasing the distance from the column. Conclusion: Using gravel as a reinforcement for lime columns doesn’t hinder the diffusion of lime into the soil block and maintains the process of treating surrounding soil.
Keywords: Distance from column, liquid limits, free swell, treatment duration.
Background: Using lime in expansive soil treatments have been proven effective from the many researches on this topic, different methodologies were employed In order to achieve the best exploitation of lime as a cost effective material. The methods such as mixing, injection and lime columns or micro lime piles. Several studies have been conducted on the last two methods and were proven effective and confirmed the diffusion of lime within the soil, but some other studies have indicated a decrease in the resistance of these columns over time, which prompted many researchers to find different methods that increase the long-term resistance of lime columns. These studies were limited to measuring the change in resistance and neglected the study of the changes of physical properties of the soil surrounding the column due to lime diffusion, considering the fact that adding a strengthening material to the column decreases the amount of lime used. Methods: This research is based on a laboratory model in which a clay bed of expansive soil is formed within a cylindrical metal mold with a diameter of 30 cm and a height of 30 cm. In the center of the clay bed the lime-gravel column was implemented. The mold was left for curing periods of (7, 28, 54, and 112), and for each treatment period, soil samples were extracted at radial distances from the column starting from one times the column diameter to five times diameter in the form (1D, 2D, 3D, 4D, 5D). The extracted samples were tested for liquid limit, free swelling and direct shear. Results: The results showed a clear decrease in the values of LL and free swell index as well as an increase in shear resistance by increasing the treatment period and decreasing the distance from the column. Conclusion: Using gravel as a reinforcement for lime columns doesn’t hinder the diffusion of lime into the soil block and maintains the process of treating surrounding soil.
Keywords: Distance from column, liquid limits, free swell, treatment duration.
Corresponding author Author & Copyright Author © 2020: | Norah, Nizam 1* |. All Rights Reserved. All articles published in American Journal of Innovative Research and Applied Sciences are the property of Atlantic
Center Research Sciences, and is protected by copyright laws CC-BY. See: http://creativecommons.org/licenses/by-nc/4.0/
EFFECT OF LIME MORTAR GRAVEL COLUMNS TECHNIQUE ON PHYSICAL CHARACTERISTICS OF EXPANSIVE SOILS
| Norah, Nizam 1 | and | Rami, Ousta 2 |. Am. J. innov. res. appl. sci. 2020; 11(1):50-54.
| PDF FULL TEXT | | XML FILE | | Received | June 03, 2020 | | Accepted | July 11, 2020 | | Published | July 15, 2020 |
| Norah, Nizam 1 | and | Rami, Ousta 2 |. Am. J. innov. res. appl. sci. 2020; 11(1):50-54.
| PDF FULL TEXT | | XML FILE | | Received | June 03, 2020 | | Accepted | July 11, 2020 | | Published | July 15, 2020 |