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196690

Effect of adding lime waste and sodium chloride on bentonite swelling behavior and infiltration rate

Article

Last updated: 03 Jan 2025

Subjects

-

Tags

Chemistry

Abstract

  Bentonite is artificial clayey soil that not only has the tendency to swell or increase in volume but also to shrink or decrease in volume due to variations in water content. In geotechnical engineering field, this soil causes severe damage to structures that are founded. The aim of this study is to investigate the effect of adding lime waste which is obtained from Abou Korkas sugarcane factory and sodium chloride on swelling properties of bentonite as a chemical stabilization process. In this regard, important techniques (SEM and EDX) were carried out to identify the mineralogy and microstructure variations before and after stabilization. Bentonite shows considerably different engineering behavior mainly depending on the mineralogical and chemical compositions. The results of the physical (geotechnical) tests indicated that lime waste and NaCl additives decreased the free swelling and increased the water infiltration of bentonite; the free swelling of the studied bentonite sample was 490% and free swelling for treated bentonite samples ranged between 250% and 370%, with an average of 297%. SEM and EDX analyses showed that all clay minerals are transformed to new flocculated cementitious compounds, such as calcium silicate hydrated (CSH) and calcium aluminate hydrated (CAH) so that bentonite texture is improved. The infiltration rate generally increases with either increase in salinity and electric conductivity; the values of infiltration rate were increased from 25 to 60 mm/h for the studied samples with an average value of 43.33 mm/h, due to reduction in clay content and a corresponding increase in the percentage of coarse particles. Utilization of solid wastes results in soil stabilization provides opportunity for cost savings in roadway construction, which will be of economic importance in developing countries.

DOI

10.21608/absb.2021.47748.1091

Keywords

Bentonite, swelling, lime waste, chemical stabilization

Authors

First Name

marwa

Last Name

hussien

MiddleName

salama

Affiliation

construction research institute

Email

elmashad@hotmail.com

City

delta barage

Orcid

-

Volume

32

Article Issue

Issue 1-A

Related Issue

27695

Issue Date

2021-06-01

Receive Date

2020-10-26

Publish Date

2021-06-01

Page Start

1

Page End

13

Print ISSN

1110-2535

Online ISSN

2636-3305

Link

https://absb.journals.ekb.eg/article_196690.html

Detail API

https://absb.journals.ekb.eg/service?article_code=196690

Order

4

Type

Original Article

Type Code

520

Publication Type

Journal

Publication Title

Al-Azhar Bulletin of Science

Publication Link

https://absb.journals.ekb.eg/

MainTitle

Effect of adding lime waste and sodium chloride on bentonite swelling behavior and infiltration rate

Details

Type

Article

Created At

22 Jan 2023