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Abstract
Construction and demolition (C&D) waste nowadays increasing years by years, which eventually leads to environmental and financial problems. Hence, it is suggested to recycle the concrete materials obtained from demolished building activities for geotechnical engineering applications. This study focuses on recycling the demolished concrete materials (DCM) to stabilize the Nusajaya marine clay. In this research, unconfined compressive strength (UCS) test was performed on DCM treated marine clay at 5%, 10%, and 15% and different range of curing time, 7 days, 28 days, 60 days and 90 days respectively. In additions, microstucture analysis, such as EDX, FESEM and XRD has been done in order to verify the optimum results as obtained from UCS test. The result obtained shows the strength of DCM-treated marine clay increase from 87.9kPa to 403.6kPa in 60days curing period with 15% of DCM content. EDX analysis shows the increment of Ca2+ elements meaning the cementatious agent of treated marine clay increase, hence increase the strength of soil itself. Plus, FESEM image portrays the flaky pores of the untreated marine clay, reduce because more needle-like structure of DCM contents filled up the pores particularly at 15% of DCM content. In conclusion, DCM acts as stabilizers optimally within 7-28 days curing time at 15% of DCM content.
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Details
1 Postgraduate student, Department of Geotechnics & Transportation, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
2 Senior Lecturer, Department of Geotechnics & Transportation, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
3 Lecturer, Department of Geotechnics & Transportation, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia