International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
USE OF WASTE TYRE AS SUBGRADE IN FLEXIBLE PAVEMENT Diana Johns1, T.G Deepakraja 2, M. Karthiga devi3 1,2,3PG
student, Coimbatore Institute of technology Coimbatore, Tamil Nadu, India ---------------------------------------------------------------------***--------------------------------------------------------------------were studied for mixtures of crumb tyre and soils. This Abstract - Today we know that tyres, especially the tyres paper aims at studying the suitability of crumb tyres which are fitted to motor vehicles, are manufactured from synthetic rubber. The number of vehicles is increasing for its use in pavement engineering, i.e. to stabilise the tremendously so that the discarded rubber tyres are also subgrade of the pavements. It discusses CBR value of increasing. The disposal of the scrap tyres is the major issues soil-tyre mixture and the results are presented[9]. associated with the management of waste tyres. In this project work, we are going to make use of waste tyres with subgrade layer of the flexible pavement. Soil used in the study is collected from nearby locations. In this study we are used scrapped crumb tyres from the light motor vehicle which is passing IS 2.36mm sieve. Crumb tyre is to be mixed with soil in various proportions and tested for compressive strength and California bearing ratio. The waste tyre pieces mixed with soil in various proportions and tested for California bearing ratio to determine its optimum content.
2. MATERIALS The soil sample was collected near the soil mechanics laboratory of Amal Jyothi College of Engineering & Technology, Kanjirapally. The soil was found to be inorganic clay of medium plasticity. Crumb tyres are small pieces of scrap waste tyre from light motor vehicles. In this study, the scrapped tyre pieces passing IS 2.36mm sieve considered as crumb tyre rubber.
Key Words: California bearing ratio, Compressive strength, Optimum content, Crumb tyre, Flexible pavement, Synthetic rubber, Scrap tyre.
3. METHODOLOGY Initially, the engineering properties of soil were performed. On 10th October we collected tyre samples were collected from a mat factory near Changanassery and the samples are allowed to pass through 2.36 mm sieve. The sample which is passing through 2.36mm sieve is to be used for different tests.
1.INTRODUCTION Use of tyre shreds for civil engineering application has several advantages. Recently an increasing attraction has been paid to find applications for such materials in civil engineering. The manufacturing process for tyres combines raw materials into a special form that yields unique properties such as flexibility, strength, resiliency, and high frictional resistance. If tyres are reused as a construction material instead of being burned (burning is currently the leading method of reuse accounting for 17% of scrap tires), the unique properties of tyres can once again be exploited in a beneficial manner [9]. The benefits of using crumb tyres are particularly enhanced if they can be used to replace virgin construction materials made from nonrenewable resources[11]. In recent years, civil engineering applications of crumb tyre, scrapped from light motor vehicle tyres passing 2.36mm sieve, have increased[10]. These uses include lightweight fill, insulation beneath roads, and lightweight backfill for retaining walls. The effects on water quality have been found to be negligible, although three thick tire shred fills have experienced serious heating reactions[9]. Tire shreds have also been used as an alternative to the soil as drainage media in landfill leachate collection systems. The shear strength properties of tyre chips © 2017, IRJET
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On 17th October we did the proctor test for the soil sample. The soil sample collected from the college itself near G.T lab. A representative air dry soil sample of about 3kg is taken. Sufficient amount water is added to sample. In the mould, the soil placed in 3 equal layers with compaction of 25 blows in each layer. Mass of the mould with base plate is taken. The experiment is repeated for the suitable increment of water contents. The dry density of soil sample for each water content is obtained from the formulae. Dry density, ρd= ρb/ (1 + w) ρb= Mass of compacted soil/ Volume of the mould w= Water content Compaction curve plotted between water content on the xaxis and dry density on the y-axis. The optimum moisture content is obtained for the given soil sample. On 23rd October we carried out the CBR for zero percent replacement of tyre in subgrade soil. The soil samples of 4.5 kg are sieved through 20mm IS sieve. The calculated amount of water should be added to the soil sample and mixed uniformly. Then the spacer disk inserted into the mould and soil is placed in the mould in 3 equal layers with a compaction of 56 blows. The base plate and spacer disk is removed and is weighed. The mould is inverted and clamped
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