International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
COMPARATIVE STUDY ON BITUMEN MODIFICATION USING SYNTHETIC AND NATURAL FIBER Midhila V S 1, Veena G Raj1, Teena George 2 1Final
year B Tech student Asst. Professor, Dept. of civil Engineering, Sree Buddha college of Engineering Elavumthitta Pathanamthitta, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------2
Abstract - Transportation sector is showing immense
enhances the stone to stone contact resulting in an increasing resistance to crushing and resulted in a stiffer and tougher mix with considerable improvement in compressive strength. Utilization of changed bitumen with added substances like polypropylene (PP) fibers, sisal fibers etc. are picking up fame as method for controlling asphalt distresses. Improvement of polypropylene fibers as modifiers has prompted propelled characteristics known for its great procedure ability, low cost, vital binding property, low density and control of properties of materials at submicron level. By the use of natural fiber, it shows higher compressive strength than the conventional mix, increasing the resistance to crushing with superior water resistance property.
growth in the recent decades, modern vehicles introduced require a more stable platform to run better. In terms of road construction, we are not yet reaching the modernized standards adopted by other countries and usage of modern and innovative road construction materials are yet to be used in transportation infrastructure sector. The available roads are also getting damaged due to improper maintenance of top layer of the road and no bond strength between the bitumen and coarse aggregate. To avoid this kind of cracks and failure of surface bitumen, this is the main binder in the road construction need modification. In this study, there is a comparison between the bitumen modification using synthetic fiber and natural fiber. The bitumen used is the VG-30 which has a penetration value of 50-70 mm. The synthetic fiber used is polypropylene fiber and the natural fiber is the sisal fiber.
1.1 Literature Review Ravi K Sharma found that polymer Modified Bitumen have a high elastic recovery (79%), higher rutting resistance and the Marshall stability increases by 27%.
Key Words: VG-30 Bitumen, Sisal fiber, PP fiber, marshall stability test
Sumi S and N Unni krishnan found that interest in the natural fibers has resulted in the development of large number of modification techniques to bring them at par and even superior to synthetic fibers and also the applications of natural fibers in engineering projects extend from light weight composites to ground engineering applications.
1. INTRODUCTION A decent roadway framework is a fundamental segment of a strong and stable economy for a developing nation like India. Being the second largest growing economy in the world, road infrastructure in India is developing at a very fast rate. As the present day interstate transportation has fast, high traffic activity, substantial load and channelized traffic movement, bituminous asphalts roads are subjected to different sorts of distresses and the roads laid with conventional bituminous mixes decreases. Due to this riding quality also gets reduced, which results in exorbitant vehicle operating costs and frequent maintenance interventions due to early failure of pavements. Due to variation in climate, rainfall intensities terrain condition, and soil characteristics providing durable roads have always been a problem for a country like India. To solve the problems associated with pavements a good amount of research is throughout the country in this field.
Mahesh M Barad found that thermal behavior of the polypropylene shows that it softened easily without any evolution of gas around 130-1400C, this has been scientifically verified. Anzar Hamid Mir found that plastic will increase the melting point of bitumen. It strengthened the road construction, increased the road life and road quality. Disha Rajyaguru, Rohit Kumar, Prof. C. B. Mishra found that 5% of PP of 12mm length is better than other percentages because the air void increased to 17.45%. P Teja Abhilash and K Tharani found that By adding 5% of bitumen content and 0.2% of fiber, properties of mix is improved by using sisal fiber with BC
The problems can be reduced by modifying conventional bituminous mix by adding various types of modifiers like polymers and fibers which will strengthen the bonding between the aggregates provided by the binder. This
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