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انت تشاهد مقالات الاستاذ  زيد حميد مجيد الحسون
عدد المقالات والبحوث 7 هذا الاستاذ ينشر تحت فئة كلية الهندسة

EFFECT OF NANOMATERIAL TREATMENT ON GEOTECHNICAL PROPERTIES OF A PENANG SOFT SOIL  394 Views
This study aims to investigate the effect of addition of different nanomaterials, including nano Cu, nano MgO, and nano clay, on the geotechnical properties of soft soil samples from Penang State. Various amounts of nanomaterials (0.05% to 1%) were added to the soil to study their effect on the soil’s compaction characteristics, consistency limits, and compressive strength. Improvements in these geotechnical properties depended on the type of nanomaterials added, and increasing the percentage of each of the added nanomaterials increased the maximum dry density of the soil. The linear shrinkage and plasticity index decreased with increasing nanomaterial content. The unconfined compressive strength increased as the nanomaterial content increased up to a certain percentage in the soil and then decreased afterwards.
A Review of Stabilization of Soils by using Nanomaterials  460 Views
Nanotechnology revolves around the creation of a varied collection of nanomaterials (NM), which encompass nanoparticles (NP) along with nano objects. NM are known to be 100 nm lower in terms of dimensions whereas nano objects fall two dimensions lower. An example of this phenomenon can be observed through carbon nanotubes. Nanoparticles are described as materials three dimensions lower than 100 nm. This paper reviews the application of nanotechnology in geotechnical engineering. It discusses soil stabilization and its types, as well as the nanomaterial additives used in soil improvement, and analyzes its effects on soil. Furthermore, this work also discusses the influence of recent advances in nano-instruments and electron microscopes as well as their application in geotechnical studies.
Stabilization of Soft Soil Using Nanomaterials  766 Views
Tests were conducted to investigate the influence of using nanomaterials in the modification and stabilization of soft soil. The soft soils were collected from two sites and treated with three nanomaterial types (nano-copper, nano-clay and nano-magnesium). Nanomaterials were added in small amount (?1.0%) by dry weight of the soil. Laboratory tests to determine the Atterberg limits, linear shrinkage, compaction characteristics and unconfined compressive strength were performed. Results of the investigation showed significant improvement in maximum dry density, plasticity index, linear shrinkage and unconfined compressive strength. The improvement is dependent on the type of nanomaterials. The unconfined compressive strength and maximum dry density increased as the nanomaterials content increased until reach a percentage after which the strength will be decrease. Thus, the addition of finer particles such as nanomaterials, even at low doses, could enhance the properties of soil.
Soil Stabilization Using Lime: Advantages, Disadvantages and Proposing a Potential Alternative  921 Views
This study is an overview of previous studies on lime (quick and hydrated) -treated soil. Lime is the oldest traditional stabilizer used for soil stabilization. The mechanism of soil-lime treatment involves cation exchange, which leads to the flocculation and agglomeration of soil particles. The high pH environment then causes a pozzolanic reaction between the free Ca+2 cations and the dissolved silica and alumina. Lime-treated soil effectively increases the strength, durability and workability of the soil. Such treatment also improves soil compressibility. A fluctuation behavior was observed on the influence of lime on soil permeability. However, the factors affecting the permeability of the soil-lime mixture should be extensively studied. Nonetheless, lime treatment has a number of inherent disadvantages, such as carbonation, sulfate attack and environment impact. Magnesium oxide/hydroxide are thus proposed as a suitable alternative stabilizer to overcome at least some of the disadvantages of using lime in soil stabilization.
Treatment of Soft Soil with Nano Magnesium Oxide  792 Views
The effect of nano magnesium oxide on some geotechnical properties of a local soil is investigated. Four different remolded water contents were used to prepare the tested specimens. These water contents represent the optimum and wet of optimum conditions. The soil was then mixed with nano magnesium oxide ranging between 0 to 1.0 % by dry weight of soil. Consistency limits and uncon-fined compression tests were conducted to study the change in basic soil behavior. The results of the study indicated that the plasticity index exhibits significant re-duction compared with untreated soil. The reduction is in proportion with curing time and nano magnesium oxide surface area (i.e. by using N-MgO) as well as the doses of N-MgO. The unconfined compressive strength of treated soil increased significantly over time with increasing percentage of N-MgO. The mechanical be-havior of treated soil changed from ductile to brittle associated with remarkable increase in Young s modulus. The results also revealed that the stiffness developed from soft and medium stiff in the case of original soil to a very stiff soil particular-ly for soil – N-MgO mixtures.
The Effects of Using Nanomaterials to Improvement Soft Soils  807 Views
Tests were conducted to investigate the influence of using nanomaterials in the modification and stabilization of soft soil. The soft soils were collected from two different sites and treated with three nanomaterials (nano-copper, nano-alumina, and nano-magnesium). Nanomaterials were added in small amount (? 1.0%) by dry weight of the soil. Laboratory tests to determine the compaction characteristics and unconfined compressive strength were performed. Results of the investigation showed significant improvement in maximum dry density, and unconfined compressive strength. The improvement is dependent on the type of nanomaterials. The unconfined compressive strength and maximum dry density increased as the nanomaterials content increased until reach a percentage after which the strength will be decrease. Nanomaterial contents in excess of the optimum content cause agglomeration of particles that adversely affects the mechanical properties of the soils. In general, the addition of finer particles such as nanomaterials, even at low doses, could enhance the geotechnical properties of soil. Also considering the possible negative environmental effects of chemical addition to soils, the possibilities of using nanomaterials as stabilizing agents of soft soils this combined admixture is intended to reduce the cost and promote a more environment-friendly and sustainable stabilizing agent. Keywords: Soil stabilization, soft soil, nanomaterials, unconfined compressive strength, SEM.
An Analysis on Geotechnical Properties of Soil with Different Nanomaterials  805 Views
In this paper, we analyze the geotechnical properties of the natural soft soil and its mixture with different nano materials at different percentages by conducting different number of experiments. The main objective of our work is to find whether the nano materials and their percentage level will increase the soft soil geotechnical properties or not. To accomplish this process, initially the natural soil sample is collected and the different geotechnical properties of the collected sample are computed. Then, the nano materials with different percentages are added to the natural soil sample and obtained the corresponding geotechnical properties for the mixture soil sample. Subsequently, a mathematical model is developed to find the optimal geotechnical properties value in different nano materials with different percentages. The developed mathematical model shows the geotechnical properties levels of nano mixture soil for unknown experiments. Finally, a fine tuning model process is conducted to check whether the nano material mixture of the natural soil will increase its geotechnical property or not. In this way, our proposed technique finds the optimal geotechnical property value for the unknown experiments and also produces an accurate result in fine tuning process. The implementation result demonstrates the geotechnical properties results of natural soil and nano mixture soil under different experiments. Our proposed technique shows that the geotechnical property values of the nano mixture soil are high compared to the natural soil. Moreover, the developed mathematical model is better to find the optimal geotechnical property value for unknown experiments.

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