Geosynthetics Modern civil engineering construction materials Modify/Improve soil/geologic material behaviour Developed/Synthesized for specific function or application in construction More than 1billion sq m annual use
Other Applications in Highways Geosynthetic Reinforced Soil Walls Reinforced soil slopes Subsurface Drainage systems-trench drains, strip drains Stabilising canal road systems in expansive soil regions. PVD.
Geosynthetic Reinforced Soil Wall
Geosynthetic Band drains
Impediments Most of the Geosynthetics are imported. Test Methodology they adopt is from country of origin. Test could be of:- Test could be of:- International standards (ISO TC221 Geosynthetics). European Standards (CFN TC Geosynthetics). German Standards DIN textiles norms. British Standards BS American Standards ASTM. Very few Indian Standards.
specifications Specifications are from international organizations. AASHO. British Textile Technology Group - BTTG. DGGT- EBGEO, Germany. Geosynthetics Research Institute, USA Presence of large number of test methods & specifications are a matter of concern and confusion. Presence of large number of test methods & specifications are a matter of concern and confusion.
Need for Testing Index Testing-Basic Properties of Products Quality control tests- Rapid testing to assure continuity of equality. Performance testing- Testing of Geosynthetics in contact with soil under standard conditions in the lab to provide better simulation of site conditions. Also in full scale on site.
R&D FACILITIES The existing Labs may have excellent facilities but The existing Labs may have excellent facilities but May not necessarily have all relevant facilities for test house. May not necessarily have all relevant facilities for test house. May not maintain ambient temperature and humidity as required by ISO (21± 2°C &65%). May not maintain ambient temperature and humidity as required by ISO (21± 2°C &65%). May not have necessary Grips for all varieties of Geosynthetics. May not have necessary Grips for all varieties of Geosynthetics. May not have skilled/Trained Technicians. May not have skilled/Trained Technicians. Not accredited. Not accredited.
SUGGESTIONS Need for establishing national organisation to address the problems. Role:- 1) Functions as a Geosynthetics test house. i. QC checking at the place of manufacturer. ii. Property assessment of the product for the designer. iii. 3 rd party quality control testing of product. iv. Testing & evaluation for product certifications. v. Testing for R&D needs.
SUGGESTIONS 2) Render advice to the industry & Govt. 3) Organise short refresher & training programs. 4) Develop laison with all specifying dept. like BIS, IRC & International institutions. Immediate Standardization of specifications, test procedures. Code on the lines of BS 8006.