Abstract
Chemical stabilization involves application of chemical admixtures to improve the behaviour of soil. Thus, this study was carried out to validate the effectiveness of nanolime additives as soil stabilizer. Lime and nanolime were chosen as additive to investigate its effect on some geotechnical properties of clayey soil. The soil was mixed with the additives ranging from 0.2 to 1.0% by dry weight of soil. The results indicate that adding a low percentage of nanolime can lead to a noticeable reduction in soil plasticity. It is found that a considerable improvement in soil compaction results was achieved with nanolime compared with lime. Nanolime shows superiority in soil improvement compared with lime even at the dosage of 0.5%. Chemical reactions between the calcium oxides and dissolved silica present in the soil mineral produced calcium silicate hydrate (CSH), where the morphology of this product can be recognized under FESEM test. The results indicate that the stabilization mechanism of treated soil involved flocculation and agglomeration of soil particles by Ca+2 which bridges the negatively charged clay particles The existence of even a minute amount of nanolime can result in extraordinary effects on the engineering properties of soil.
Highlights
Chemical stabilization involves application of chemical admixtures to improve the behaviour of soil
For curing period of 28 days, the liquid limit (LL) increased up to 37% and 35.7% for soil-lime and soil-nanolime mixtures respectively compared with the original soil (LL= 31%)
Higher optimum water content was obtained at this nanolime content
Summary
Chemical stabilization involves application of chemical admixtures to improve the behaviour of soil. When clays are difficult to compact, chemicals can be added to slightly disperse their particles and assist the process [1]. The transition from micro particles to nano particles can attribute to positive changes in physical properties. This is because of the increase in ratio of surface area and changes in volume. Due to the large surface area of nano particles, a lot of interactions occur between intermixed materials such as nano composites which lead to an increase in strength of the materials [3]. Laboratory experiments were presented to study the fundamental geotechnical properties of mixtures of natural soils and its’ product after ball milling operation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
