stabilization of soil

Journal of Rehabilitation in Civil Engineering, 2014

Article history: Received: Accepted: Subgrade soil stabilization is one of the primary and major processes in the construction of any highway; also environmental authorities are concerned about the growing amount of polyethylene (PET) bottles produced by household sectors. This research in order to study effect of adding recycled polyester fiber on soil engineering properties, especially shear strength and California Bearing Ratio (CBR) used clay soil with low liquid limit (CL) and atterberg limits used high liquid limit (CH). Clay soil with recycled polyester fibers are mixed with soil in three different percentages 0.1%, 0.3% & 0.5% (the portion of stabilizer matters to soil net weight). Shear strength, CBR, atterberg limits of stabilizer samples were measured by direct shear test and CBR test and atterberg limits test. Experiments results show this fact that using of recycled polyester leads to increasing shear strength and CBR and reduction, plasticity index. It is remarkable th...

2020

1M.Tech. Student, Construction Engineering and Management, Department of Civil Engineering, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India. 2Assistant Professor, Department of Civil Engineering, M.S. Ramaiah University of Applied Sciences, Bengaluru, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract To encourage the usage of inferior locally available soil and also to enhance its strength stabilization techniques need to be adopted. Rapid urbanization and industrialization all over the world have resulted in large deposition of waste plastic. Disposal of waste plastic in the environment is a big hazard as it is non-biodegradable. In this paper, an experimental study is carried out to investigate the strength of stabilized soil by adding WPF have been discussed. The main objective of this study is to carry out the laboratory tests on stabilized...

International Journal of Technical Research & Science, 2020

Soil stabilization is one of the best methods for improving index properties, physical properties like shear strength, bearing capacity etc. of the soil. For soil stabilization various admixture such as cement, lime, fly ash, gypsum etc. can be used. But these admixtures are costly so their uses for soil stabilization are limited. In some research it is found that utilization of waste material like plastic, bamboo etc. are quite helpful in stabilization of soil. In present world there is scarcity of good soil which makes construction process difficult. So to enhance the properties of soil so that it can be used for various constructions there is need to add the suitable admixture in soil. These admixtures should enhance properties of soil and also be economical. The foundation is very important for any structure and it has to be strong enough to support the entire structure. For foundation to be strong the soil around it plays a very important role. A review paper is presented here to focus on soil reinforcement by using shredded waste plastic products. The tests such as liquid limit, plastic limit, standard proctor compaction test, California bearing ratio (CBR) test and unconfined compressive strength (UCS) have been conducted to check the improvement in the properties of problematic soil.

Resilient modulus (Mr) is a representative property for characterizing unbound granular materials and subgrade soils. It exhibits the elastic behavior as well as the load-bearing ability of pavement materials under cyclic traffic loads. This paper investigates the influence of using recycled plastic Polyethylene Terephthalate (PET) as a soil reinforcement material on the Mr of a clayey soil; ordinary soil in the delta region in Egypt. A comprehensive laboratory testing was conducted at Mansoura University Highway and Airport Engineering Laboratory (H&AE-LAB). The conducted testing includes standard engineering tests and repeated-loading triaxial tests (RLTT). Laboratory specimens were prepared at four different percentages of the recycled PET (0%, 0.2%, 0.6%, and 1.0%). RLTT results shows that the Mr of 0.6% PET-reinforced specimens increases by 58% compared to the Mr of the control specimen (0% PET). However, the Mr of the reinforced soil is found to decrease with the increase of PET percentage. Moreover, the universal Mr model exhibits excellent Mr predictions for the control and the PET-reinforced clay soil. Economically, the initial cost for constructing a 10-km road segment decreases by 8% using the 0.6% PET-reinforced Subgrade compared to the control Subgrade. Finally, damage analysis using the KENLAYER software is used to manifest the enhancement of pavement performance by reinforcing the Subgrade with PET.

There is an increased production of single use plastic bags in recent decades due to higher demand and lesser manufacturing cost. The increased production of single use plastic bags results in generation of larger quantity of solid waste and is very difficult to manage and also possess severe environmental issues. An attempt is made in this research to use waste plastic bags to improve the engineering properties of sandy soil. Random inclusion of strips of high density polyethylene material from plastic shopping bags results in increased shear strength of sandy soils. A series of direct shear tests was undertaken on soil-plastic composites of two selected sandy soils .Strips of shredded plastic material were used as reinforcement inclusions at concentrations of up to 0.3% by weight. The effect of varying dimensions of the strips was investigated by using strip lengths from 15mm to 45 mm and strip widths from 6 mm to 18 mm. Soil strength parameters were obtained for composite specimen from which analyses were carried out to identify the extent of soil improvement. Laboratory results obtained favourably suggest that inclusion of this material in sandy soils would be effective for soil reinforcement in geotechnical engineering.

Strips of shredded plastic material were used as reinforcement inclusions at concentrations of up to 0.3% by weight. The effect of varying dimensions of the strips was investigated by using strip lengths from 15 mm to 45 mm and strip widths from 6 mm to 18 mm. Soil strength parameters were obtained for composite specimen from which analyses were carried out to identify the extent of soil improvement.Laboratory results obtained favourably suggest that inclusion of this material in sandy soils would be effective for soil reinforcement in geotechnical engineering.

Advances in Civil Engineering, 2022

Expansive soils are known for their volume changes due to fluctuation in the moisture content of the natural ground. This volume change causes huge destruction to many infrastructures. To avoid such damages, expansive soils should be well treated so that they become safe against bearing capacity failure and excessive settlement. In addition, everywhere plastic environmental pollution is a critical issue, which needs a proper way of utilization. This study primarily aimed at utilizing waste plastic materials with lime as subgrade pavement materials, which is cost-effective and environmentally friendly. Plastic water bottles are used as reinforcement with lime to improve the plasticity and strength properties of the expansive soils. Various laboratory tests are conducted using plastic waste strips with 0.25%, 0.5%, 0.75%, and 1% proportions as soil reinforcement and constant 5% of lime. Finally, significant improvements in CBR, unconfined compressive strength, and free swell are obser...

The objective of this study is to demonstrate that a waste material can be used as reinforcement and for this purpose a series of experimental study was carried out to investigate the CBR behavior of waste plastic strip reinforced soil. The effect of waste plastic strip content (0.25% to 4.0%) and strip length on the CBR and secant modulus of strip reinforced soil was investigated. The study reveals that addition of waste plastic strips of appropriate size and proportions in soil results in an appreciable increase in both the CBR and secant modulus. The waste plastic strip reinforced soil can be used in low cost embankment/road construction leading to significant cost advantage as well as safe disposal of these waste materials in an environment friendly manner.

Iraqi Journal of Civil Engineering

Today waste plastic bottles are spread widely throughout our world especially in Kurdistan, an autonomous region in Iraq. These waste products cause many environmental problems and at the same time some soils are weak and need reinforcement using cheap materials such as Polyethylene terephthalate (PET) waste plastic bottle. Use of waste plastic bottles as a reinforcement of soil is highly recommended to reduce the amounts of plastic waste, which creates a disposal problem. In this study an attempt was made to use plastic fibres produced from waste bottles to reinforce sandy soil. This can solve both environmental and geotechnical problems. In the research, the effect of plastic fibres content as well as fibre length on shear strength parameters (cohesion and internal friction) were experimentally predicted using the direct shear test method so as to improve bearing capacity of weak soils. The results showed that under low normal stress the inclusion of plastic fibres increased both angle of internal friction and cohesion; however, under high normal stress (greater than 100 kPa) the cohesion increased and the internal friction was roughly unchanged. Also, it was concluded in this study that the suitable amount of fibers that can be added to weak soils is 1% of dry weight of sand.

2016

In the present era, disposal of waste material is a great challenge. Plastic is a waste material which harms the environment. With increasing demand of disposing waste materials, plastic such as shopping bags is utilized as a reinforcement material in this study. Plastic strips obtained from the waste plastic are mixed randomly with the soil sample. Failures of pavements are caused due to many reasons or combination of reasons. Subgrade should be stabilized to improve the performance of such pavements in long run and to minimize the maintenance cost. Stabilization if not done proper, may lead to fatalities in flexible pavements. Stabilization of soil can be performed in number of ways, but the stabilization using waste plastic strips is an economical method since the stabilizer used in current study is waste plastic materials, which are relatively cheap and easily available in the market. This paper presents the various laboratory tests conducted on fibre reinforced soil with varyin...