New Geo-material for Reclamation: Coal Ash-hardened Marine Soil

Final Year Project, Department of Civil Engineering

Project supervisor: Dr. C. Y. Kwok (Department of Civil Engineering)

Project information

Project descriptions

Extensive reclamations such as the Airport 3rd Runway System, Tung Chung New Town Extension and the Lantau Tomorrow Vision are proposed and these megaprojects require over 500 million tonnes of backfilling material. However, local fill banks only provide less than 10 million tonnes yearly. In order to alleviate the shortage, this study aims at producing a new geo-material by hardening soft marine soil primarily with coal ash generated from power plants. Unconfined compression tests were carried out on hardened soil specimens. A set of variables were tested to examine the optimum mix design. About half of the specimens achieved an unconfined compressive strength of over 1 MPa. The result shows that water to stabiliser ratio and the curing duration are the key strength-contributing factors. It was also found that the unconfined compressive strength of hardened soil is nearly proportional to its deformation moduli. These showed that coal ash is effective yet economic for hardening marine soil.

Team information

Project leader: Shiu Hoi Kit, BEng(CivE)

Project member: Shiu Hoi Kit, BEng(CivE)

Project poster
Project video
Project images
Soil testing 1
Soil testing 2
Soil testing 3
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Specimen casting 1
Specimen casting 2
Specimen casting 3
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Specimen testing 1
Specimen testing 2
Specimen testing 3
Specimen testing 4
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Awards

Winner of the Dean’s Fund Award @ The 1st Engineering InnoShow

This project team was selected for the Dean’s fund award at the 1st Engineering InnoShow. 

This team has received HK$10,000 sponsorship to participate in external competitions or incubation/ entrepreneurship/ startup programmes.

 

The best project award - COMP3329 Computer Game Design and Programming @ The 1st Engineering InnoShow

This project team was selected for the best project award – COMP3329 Computer Game Design and Programming at the 1st Engineering InnoShow.

Members of the Club Grenade project team in HKUEAA Annual Dinner