Title

GEO-TYRE STABILISATION” TECHNOLOGY IN PAVEMENT CONSTRUCTION

Brief Description (Abstract)

Abstract: The rapid increase in traffic intensity on roads has become almost indispensible in human life. At the same time we find there is tremendous change in climate due to “Global warming” effect on the earth. So deterioration of roads by their age and their condition has become an unavoidable phenomenon in day to day life. As the days pass on, all roads need rehabilitation. Rehabilitation of pavement is a major activity for all highway agencies and has several consequences on an agency resources and traffic disruption because of extensive and extended lane closures. The traffic volume on the primary highway system has seen tremendously being increasing which is leading to failures of highway pavements. The aging of the highway system and other primary systems built long ago has resulted in the expenditure of a large portion of highway funds on pavement rehabilitation which does not use proper method / technique and materials for rehabilitation and hence again fails. Efforts to develop innovative techniques and procedures that will result in cost effective, environmental friendly and long lasting pavement rehabilitation to serve the nation’s highway and other road systems well into the 21st century should be made.
The main causes of deterioration of pavements are; Climatic condition, Use of unsuitable materials, Use of faulty design, Unwarranted sudden increase in traffic loading, Poor clayey sub grade like soft caly, Shedu soil & B.C soil & Use of improper methodology of rehabilitation.
The stability of the sub grade which is treated as the foundation of the pavement plays a vital role in performance of road structure. So in this era many new technologies have come in to picture for stabilising the Sub grade soil like Geo-grids, Geo-fibre, Geo-cell or the like. The confinement of the Sub grade soil is to be given ultimate importance rather than only the quality of the infill materials. Any inferior infill material used in the sub grade if confined well, can take greater vehicular loads than an unconfined good quality infill material. The stabilised sub grade takes care of the upper layers like Sub base, base, binding layer and wearing coat for their longer durability.
At present the waste tyres are being used in road construction by disintegrating the tyres through some process making use of the rubber for manufacturing the CRMB (Crumb Rubber Modified Bitumen) etc., To avoid huge expenditure involved in disintegration of tyres, the waste tyres are also being burnt for ultimate disposal, which leads to maximum contribution to environment impacts due to emission of Carbon dioxide (CO2) and Carbon monoxide (CO) and adding to Global warming. In this context here is one different innovative thought of using raw waste tyres at Sub grade or sub base level as the case may be for the confinement of the infill material with some specific innovative method techniques (which is under research process) without disintegrating or melting the tyres. Since the methodology is with the soil combination technique, the name given is “Geo-Tyre” technology. The Geo-Tyre technology is not only cost effective, long life but is also eco-friendly. This solves the problem of disposal of large quantity of waste tyres all over the nation and controls the environmental impacts. On survey it is computed that the waste tyres available only from KSRTC in KARNATAK per year are 180000 (As per data collected). Using which 45 km length of the single lane road can be strengthened per year. The benefit of use of waste tyre available all over India is yet to be computed.

Key Details
  • Industry

    Public works departments (Central and State)

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