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المؤلفTaqa, Ala A.
المؤلفAl-Ansari, Mohamed
المؤلفTaha, Ramzi
المؤلفSenouci, Ahmed
المؤلفAl-Marwani, Hassan A.
المؤلفAl-Zubi, Ghaleb M.
المؤلفMohsen, Mohamed O.
تاريخ الإتاحة2023-12-06T09:34:56Z
تاريخ النشر2021
اسم المنشورApplied Sciences (Switzerland)
المصدرScopus
الرقم المعياري الدولي للكتاب20763417
معرّف المصادر الموحدhttp://dx.doi.org/10.3390/app11188623
معرّف المصادر الموحدhttp://hdl.handle.net/10576/50168
الملخصThis paper investigates the potential utilization of the Tunnel Boring Machine (TBM) muck generated from Doha's Metro Gold Line in different construction applications. The properties of the raw TBM muck were studied, and the results were compared to the specifications of Qatari Construction Standards (QCS 2014) of concrete aggregates, fill material under buildings and road subgrades. Compared to the requirements of concrete aggregates, the results indicated that the gradation of the raw TBM muck does not comply with the QCS 2014 requirements, and hence, sieving and screening may be essential. Moreover, the tests' results showed that the properties of the muck meet the requirements of the concrete coarse aggregates, except for the water absorption, loss by magnesium sulphate soundness, loss by Los Angeles abrasion and the acid-soluble sulphate. As fill material under buildings or road subgrades, the gradation of the TBM muck complies with the QCS 2014 requirements, while the liquid limit and plasticity index are higher than the QCS 2014 permissible limits. Additionally, the morphological structure and the elemental composition of the raw TBM muck were determined by employing Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray analysis (EDX), respectively. Digital images were also taken at larger scale to draw a full picture of the TBM muck morphology. A mixture of rough-rounded to angular-elongated shaped particles with relatively large voids could be observed. The EDX analysis demonstrated the presence of silicon (Si) as the predominant component of the muck, which may alter the Coefficient of Thermal Expansion (CTE) values for mixtures prepared using TBM muck. Hence, further investigations should be performed on the mechanical and thermal properties of mixtures containing TBM muck as aggregates' replacement, and further work should be directed toward this end.
راعي المشروعFunding: This research was funded by Qatar National Research Fund (QNRF) through Project # PDRA 5-0228-19001.
اللغةen
الناشرMDPI
الموضوعAggregates
Chemical and mechanical tests
Construction
EDX
Physical
Recycling
Sustainability
TBM muck
العنوانCharacterization of tbm muck for construction applications
النوعArticle
رقم العدد18
رقم المجلد11
dc.accessType Open Access


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