Tear Propagation of Spun-bonded Nonwoven Geotextiles at Repeated Bursting Pressure Cycle

 

Das, Apurba

Department of Textile Technology, Indian Institute of Technology
New Delhi
e-mail: apurbadas65@gmail.com

Krishnasamy, J.

Department of Textile Technology, Indian Institute of Technology
New Delhi
e-mail: krishnasamytext@gmail.com

Alagirusamy, R.

Department of Textile Technology, Indian Institute of Technology
New Delhi
e-mail: alagiru@gmail.com

 

 ABSTRACT

The present paper reports the analysis of tear propagation of polypropylene heat-sealed spun-bonded nonwoven geotextiles due to repeated pressure cycle before bursting. The present study simulates the actual behaviour of geotextiles in road construction where it is subjected to repeated multidirectional bursting pressure. Spun-bonded nonwoven geotextiles with different areal density of 50, 100 and 200 g/m2 were used for the study. The geotextile fabrics were subjected to number of bursting cycles at three levels of % bursting pressure. Two types of tears were initiated (2 mm length) on the fabric samples before cyclic burst testing. The effect of fabric parameters which affects the tear propagation like areal density, number of pressure cycles and %bursting pressure were studied in detail. It has been observed that for the higherareal density fabric, bursting strength and extension of the fabric were higher but the tear propagation was lower. It has also been observed that rise in repeated pressure cycle increased the tear length of fabric. However, at higher level of bursting pressure (80%), geotextile fabric failed at lower number of pressure cycles.

Keywords: Bursting strength, tear propagation, cyclic pressure, tear length

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