Effects of reinforcing granular columns with fibres generated from plastic bottle waste (original) (raw)
Related papers
2019
This work materialised thanks to the continuous support, guidance and remarkable patience of my supervisor, Associate Professor Denis Kalumba. During my research journey, our discussions and his suggestions have benefitted me by increasing the stimulation and interest in the various areas of geotechnical engineering. Although, I could not include all that I have learned from him in this dissertation, I am extremely grateful to him for the knowledge that he has imparted to me. This will certainly be embedded in me forever. Without the sponsorship provided by the Geotechnical Research Group at the University of Cape Town, this work would have been impossible. I express my thanks to the group for the financial support. A big thank you also goes to the colleagues in the group for the interesting conversations. I would like to thank the laboratory manager, Mr Noor Hassen, for his continuous assistance. Mr Charles Nicholas, the workshop manager, is also highly recognised for fabricating the testing tank and the trolley. My appreciation additionally goes to Mr Tahir Mukaddam (senior technical officer) and Mr Elvino Witbooi (laboratory assistant) who have helped where necessary. A special thank you goes to the laboratory assistant Mr Christopher Ceasar for his high dedication, patience and hard work when assisting in preparing the materials for testing. The staffs of the Department of Civil Engineering at the University of Cape Town are also acknowledged for their assistance throughout, especially Ms Avril Courie the departmental purchaser. The materials used in the experiments were sponsored by different companies. I am thankful to the following companies in this regard: Corobrik for the Durbanville silt, Fibertex South Africa for the fibres and geotextiles, and Kaytech Engineered fabrics for the flakes.
Effects of Waste Plastic Fibres on Compaction and Consolidation Behavior of Reinforced Soil
In this paper a laboratory investigation has been carried out to evaluate the effect of waste plastic fibre on compaction and consolidation behaviours of reinforced soil. The initial stage of the experimental programme includes the study of the effect of plastic fibre (as reinforcement material) on maximum dry density (MDD) and optimum moisture content (OMC) with different sizes and contents. In this experimental study, raw plastic bottle fibres has been used in three different aspect ratios (AR), i.e. 2 (size=10mm Χ 5 mm), 4 (size= 10mm Χ 2.5mm) and 8 (size=10 mm Χ 1.25 mm). These different sizes of plastic strips have been mixed with local sandy-silt soil with clay (Fine Sand = 40.15%, Silt = 30.90%, and Clay = 28.95%) in four different percentages 0.00, 0.25, 0.50 and 1.00% by dry weight of the soil. From the present experimental study on remoulded fibre reinforced soils, it has found that, compression index (C c ) and coefficient of volume change (m v ) values decreases with the increase of fibres in soil from upto 0.50%, but values increases with further increase of plastic fibres upto 1.00% in soil. 90% of total compression takes place within 96 seconds for 800 kN/m 2 load with the inclusion of the plastic fibres in soil with aspect ratio 8 and fibre content of 1.00%.
Reinforcement of sandy soil using plastic fibres made from waste plastic bottles
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.
Effect of Waste Plastic Chips on the Strength and Swelling Pressure of Silt
The Asian Review of Civil Engineering
Laboratory tests were conducted to study the effect of waste plastic chips derived from used PET bottles on the strength and swelling potential of silt. The content of plastic waste was varied from 0, 0.5, 0.75 and 1 % by dry weight of silt. The size of waste plastic chips was 15 mm x 5 mm in the study. The results of this study reveal that there is significant improvement in the strength silt and considerable reduction in swell pressure with the inclusion of small quantity of waste plastic chips. Mitigation of expansive soils using waste plastic chips can be a good solution to reduce the swell potential of silt on which buildings and roads are going to be constructed
Engineering behavior of a sand reinforced with plastic waste
Journal of geotechnical …, 2002
Unconfined compression tests, splitting tensile tests, and saturated drained triaxial compression tests with local strain measurement were carried out to evaluate the benefit of utilizing randomly distributed polyethylene terephthalate fiber, obtained from recycling waste plastic bottles, alone or combined with rapid hardening Portland cement to improve the engineering behavior of a uniform fine sand. The separate and the joint effects of fiber content ͑up to 0.9 wt %͒, fiber length ͑up to 36 mm͒, cement content ͑from 0 to 7 wt %͒, and initial mean effective stress ͑20, 60, and 100 kN/m 2 ͒ on the deformation and strength characteristics of the soil were investigated using design of experiments and multiple regression analysis. The results show that the polyethylene terephthalate fiber reinforcement improved the peak and ultimate strength of both cemented and uncemented soil and somewhat reduced the brittleness of the cemented sand. In addition, the initial stiffness was not significantly changed by the inclusion of fibers.
Laboratory investigation of soil reinforcement using shredded waste plastic bottles
2018
First and foremost, praises and thanks to Jehovah, the Almighty, for His showers of blessings throughout my research work to complete the study successfully. I acknowledge the unconditional and steady financial support from Julian Baring Scholarship Fund. I wish to mention Colin Rothnie, Ian Mwanza, and all Mining Technical colleagues from KENMARE for providing and enabling assistance during my time of study. I would like to express my appreciation and sincere gratitude to my supervisor, Dr. Denis Kalumba, for his valuable contribution, advise, guidance and support in this work, as well as for inspiring and cultivating my interest in geotechnical engineering. I would also like to thank my cosupervisor, Ms. F. Chebet, for all her help and support. A special thank you to the University of Cape Town laboratory staff, especially Nooredein Hassen, Elvino Witbooi, Hector Zwelixolile Mafungwa and Charles May for the assistance. Thank you, Charles Nicholas, the workshop manager, for fabricating all the necessary equipment. Much appreciation to my geotechnical research group colleagues:
A Pioneering Approach Towards Usage of Recycled Plastic Fibres for Concrete Strengthening
2015
One of the most important environmental problems in recent times is dumping of the waste plastics. Recycling holds an assurance for returning of the waste material into service and supports the usage of such materials in construction. To keep away from the pollution crisis, a lot of products are being created from waste plastics that are reusable. The practice of plastic are in a variety of fields but after that waste that it makes contain adverse effect in nature and it’s not likely to control its uses. Polyethylene Terephthalate is typically employed for carbonated beverage as well as water bottles and it is an ecological trouble while waste plastic bottles are complicated to biodegrade and generally involve processes to recycle. Hence progress of pioneering construction materials by means of recycled plastic is significant to construction as well as plastic industries. This has made a way to an enhanced attention in usage of recycled plastic fibres as a secondary strengthening in...
Reinforcement of Soil Using Recycled Polyethylene Terephthalate ( PET ) Bottle Strips
2018
As good soil becomes scarcer and their location becomes even more difficult and costlier, the need to improve its quality using innovative new technique is becoming ever more important. This research involves a study on the possible use of waste plastic bottles as soil reinforcement elements. A series of tri-axial test were carried out on three different samples of soil prepared from typical soil used for routine construction in and around Kathmandu valley. The analysis was carried out by varying the percentage of plastic used varying from 0.5% to 1.5% by weight of dry soil. The results indicate 25% to 125% increase in shear strength of soil for an addition of 0.5% to 1.5% of plastic strips by weight of soil under laboratory conditions. The primary objective of this research is to find out an effective utilization of waste plastic bottles in the geotechnical engineering application, simultaneously addressing some aspects of solids waste management without adversely affecting the nat...
An Overview on the Use of Waste Plastic Bottles and Fly Ash in Civil Engineering Applications
Procedia Environmental Sciences, 2016
With rapid growth in population, it becomes difficult to control the huge amount of residual materials generated from enormous industrial activities. The residuals that are not recycled, reclaimed or reused constitute the wastes only to get released to the environment. As some of the wastes cannot be assimilated by the environment, those can become hazardous for the environment quality and ensure pollution. This paper expresses the concern on two such industrial wastes, used plastic water bottles and fly ash. The present study emphasizes on the reuse of used waste plastic water bottles in the Civil Engineering applications and in this regard, it discusses the previous work by Dutta and Mandal (2013). Two different type plastic water bottles, having different diameter and tensile stiffness, were chosen to prepare perforated cells of different heights wrapped with jute geotextile from inner side so that fine infill materials cannot escape from the perforations. Laboratory strain controlled compression tests were carried out on the cells rested over a rigid base and filled with compacted fly ash or stone aggregates. Test results showed significant load carrying capacity of the composite cells with fly ash as infill material. Though fine fly ash appeared to be an effective infill material, use of coarse stone aggregates as infill material produced better load carrying capacity of the composite cells. It was also observed that with reduction in cell height over the rigid base, load carrying capacity of the composite cells got increased. The study confirmed that plastic bottles with suitable infill material can act as an ideal compression member.
Performance of Plastic Bottle Reinforced Soil
– Use of plastic products such as polythene bags, bottles, containers and packing strips etc. is increasing day by day creating the disposal problem for the society. Attempts are therefore being made to utilize waste plastic bottles as geotechnical material to solve both geotechnical and environmental problem. This paper presents the results of detailed experimental study on the possible use of waste plastic bottles as soil reinforcement for bearing capacity improvement. Bearing capacity of square footing on sandy soil reinforced with waste plastic water bottles is evaluated and the effect of parameters like width of reinforcement (L/B ratio), number of layers of reinforcement (N) and spacing between reinforcing layers is studied through model plate load tests. Results show that there is considerable increase in bearing capacity value with the provision of plastic bottles as reinforcement.