A geosynthetic cementitious composite mat (GCCM) – An innovative material for slope protection
 
Prof. Suched Likitlersuang
Chulalongkorn University, Bangkok, Thailand
Date: 2 August 2019, Friday
Time: 2:00 pm – 3:00 pm
Venue: Room 3584A (Lift 27/28), Civil Common Conference Room
The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon
 
Abstract

A geosynthetic cementitious composite mat (GCCM) made of geotextiles and cement powder was introduced by ASTM-D8173 in 2018. GCCMs have many attractive properties, examples being high strength and stiffness after setting, uniform thickness, and the fact that they are simple to install in the field. GCCMs could be used for slope stabilisation, erosion control, containment and ditch lining. The behaviour of GCCM was firstly experimented aiming to develop an optimised composite structure between geotextile and cement layers. Experimental study includes physical and mechanical properties investigation of GCCM under installation and loading conditions. Testing of tension, flexure and interfacial resistance showed that the GCCM can be used in soil reinforced structure. A finite element modelling of GCCM was also performed using an existing bond-slip model. The numerical results showed that enhancing geosynthetic with cement paste can provide both strength and durability to be used for slope stabilisation. To study the performance of GCCM for stabilising slopes, a series of physical model tests was conducted. 1G model tests under seepage flow were performed on sandy slopes. Moreover, centrifuge modelling was also performed to study the GCCM performance for stabilising slope under rainfall. The results indicate that the GCCM performs well at slope stabilisation.

 
 
Biography

Suched Likitlersuang is currently a full professor at the Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University. He is also the founding head of Centre Excellence in Geotechnical and Geoenvironmental Engineering at Chulalongkorn University. His research interests include constitutive modeling for geomaterial, stress-strain characteristic of soils, numerical analysis in geomechanics, pavement engineering, geoenvironments, geotechnical earthquake engineering and soil bioengineering. He graduated with a bachelor degree in civil engineering from Chulalongkorn University in 1998 and received a master degree in geotechnical engineering from Asian Institute of Technology in 2000. He obtained a doctorate in civil engineering from the University of Oxford in 2004. Recently, he is appointed as Royal Society-Newton Advanced Fellowship under a project entitled “Climate-change effects on the performance of bioengineered slopes” collaborated with University of Dundee.

 
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