Project 14

Project Title: “Engineering Suitable Overlay Fabric to Serve as a Cheaper Substitute of Bitumen Mastic”
(JTM R & D Project No.  14)


1.0 Objectives:


 Development of an innovative and cost effective jute paving fabric with a combination of woven and nonwoven jute fabric.


(a) Preparation of final bitumen impregnated Composite Paving Fabric with developed grey jute paving fabric as a cheaper substitute of mastic asphalt now used in roads.

(b) Assessment of the developed fabrics functional performance in a recognized laboratory (Central Road Research Institute, New Delhi) before field trials under suitable conditions that can resist of moving loads expected on different categories of roads (e.g. State Highways, Major District Roads and Rural Roads etc.) and standardization of the same.

(c) Undertaking field trials on operational roads with different traffic intensity for assessment of the end – use performance of the said developed fabrics as existing National and International Standards in association with Central Road Research Institute, New Delhi.

(d) Dissemination and transfer of technology (Students, Industry Personnel, Researchers and End - users) on development and application of above stated composite jute paving fabrics in roads.


2.0 Deliverables:


(a) Development of different optimized suitable Grey Jute Geotextile (JGT) Paving Fabric (combination of Woven and Nonwoven Jute Fabric) for use in roads (State Highways, District Roads, Municipality and Corporation Roads along with Rural Roads etc.) as an effective surface overlay fabric.

(b) Standardization and optimization of process parameters along with machine parameters for bulk production of grey JGT paving fabric.

(c) Identification of the most suitable type and grade of bitumen for application on the developed grey JGT paving fabrics.

(d) Optimization of the most effective and suitable bituminized jute paving fabrics to be used as an overlay fabric in above stated roads.

(e) Standardization and optimization of process and machine parameters for bitumen application on grey JGT paving fabric.

(f) Cost analysis of the bituminized paving fabric and comparison with mastic asphalt to assess the techno-economic viability of the developed Bituminized JGT Paving Fabric.

(g) Identification of the most convenient size and shape of the developed fabric (easy to handle and install).

(h) Standardization of installation and application procedure of the developed JGT paving fabric in the roads.

(i)  Field trials in roads (district roads and rural roads as per DPR) for performance evaluation and standardization of the developed bituminized JGT paving fabric.


3.0 Achievements so far:

As per work plan, initially ten (10) numbers of Grey Jute Paving Fabric (GJPF which is a combination of different layers of Woven and Nonwoven Fabric) are developed. Out of which, five numbers (05) of GJPF have been selected by optimizing the dimensional and functional geotechnical properties. The related testing parameters like Tensile Properties, Bursting Strength, Puncture strength, Apparent Opening Size (AOS), Water Permeability, etc. of those developed GJPF samples have been carried out for optimizing the GJPF fabrics on which bitumen are being applied for final production of Bituminous Jute Paving Fabric (BJPF). Optimization and standardization of BJPF is entrusted with the CRRI, New Delhi (collaborative project partner). In this connection CRRI, New Delhi has sent an interim report of BJPF which is related to the use of BJPF as an overlay for prevention of reflective cracking in roads. As this report does not cover fully the project objectives, the PI of the project is going to CRRI, New Delhi for finalizing the optimization and standardization of the BJPF towards the project objective. This work is expected to be completed within October 2011. Afterwards large scale production of the optimized and standardized BJPF will be done in a suitable production house for taking actual field trials.


Dr. S.K.Ghosh

Associate Professor