Roshazita Che Amat
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Roshazita Che Amat
Official Name
Roshazita, Che Amat
Alternative Name
Amat, Roshazita Che
Che Amat, Roshazita
Amat, R. C.
Che Amat, R.
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Scopus Author ID
55749971400

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  • Publication
    Development and implementation of a methodology for National Wastewater Surveillance System of SARS-CoV-2 in Romania
    (IOP Publishing, 2023)
    Raluca Prangate
    ;
    György Deák Habil
    ;
    Monica Silvia Matei
    ;
    Mădalina Georgiana Boboc
    ;
    Ecol Elena Holban
    ;
    Roshazita Che Amat
    SARS-CoV-2 is a pathogenic coronavirus and has caused acute respiratory diseases worldwide. Over time, numerous research studies have proved the benefits of environmental surveillance through monitoring the wastewater. During the COVID-19 public health emergency, several countries have conducted studies to detect viral RNA from SARS-CoV-2 in wastewater. Also, several countries have developed a National Wastewater Surveillance System of SARS-CoV-2, currently it is also being implemented in Romania. The aim of this research is to develop, in line with the already existing volume of information, a methodology for the processing and analysis of wastewater samples for SARS-CoV-2 and to highlight methods for sample preparation (these methods are not standardised). In addition, we summarize current knowledge on recent advances and applicability of SARS-CoV-2 virus monitoring in wastewater as a tool for surveillance of COVID-19.
  • Publication
    Effect of bottom ash and limestone on the optimum binder content in Hot Mix Asphalt (HMA)
    ( 2022-01-01)
    Nur Liza Rahim
    ;
    Syakirah Afiza Mohammed
    ;
    Noor Aina Misnon
    ;
    Nurhidayah Hamzah
    ;
    Roshazita Che Amat
    ;
    Norlia Mohamad Ibrahim
    ;
    Christina Remmy Entalai
    ;
    Deák György
    One of the most effective and simplest methods to minimize waste as well as reduce the environmental problems associated with waste disposal is by utilizing waste materials as a cement replacement in hot mix asphalt (HMA) mixtures which can provide the same or better stability as the conventional method. Fillers play an important role in the stability and strength of the pavement by filling voids between the aggregate particles in the performance of the HMA mixture. This research investigated the effect of the utilization of different types of filler (bottom ash and limestone) on the optimum binder content of HMA. Flow, stability, stiffness, air void in mix (VIM) and void filled with bitumen (VFB) were determined using the Marshal Method test in order to determine the optimum binder content of HMA for all mineral filler. The results of the Marshall test for each filler have been compared with the JKR standard specification. The optimum binder content for bottom ash, limestone and Ordinary Portland Cement (OPC) was 5.42%, 5.65% and 5.54%, respectively. All values of mineral filler used meet the JKR standard specification, where the range is between 4 and 6%. From the result achieved, the bottom ash has the lower optimum binder content value compared to the limestone and OPC. When the lower binder content is used in the bituminous mixture, the cost for pavement construction will be reduced.
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