Browsing Center of Excellence for Geopolymer and Green Technology (CEGEOGTECH) (Articles) by Title

Now showing items 104-123 of 135

    • Radiation shielding characteristics of concretes incorporates different waste materials 

      Ali Basheer, Azeez; Kahtan Sadiq, Muhammed, Dr.; Mohd Mustafa Al Bakri, Abdullah; Hana, Ihsan Hasan (Trans Tech Publications, 2014)
      Samples of concrete incorporate different waste materials such as iron filings, iron balls of used ball bearings and slags from steel industry were assessed for their anti-radiation attenuation coefficient properties. The ...

    • Review on the various ash from palm oil waste as geopolymer material 

      Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Rafiza, Abdul Razak (Advanced Study Center Co. Ltd., 2013)
      The solid waste from palm oil mill industry has been increasing annually where it has been reported that the palm oil waste was produced 4 million tons/years in Malaysia only. Hence, the solution to overcome the problems ...

    • Roles of imputation methods for filling the missing values: A review 

      Norazian, Mohamed Noor; Ahmad Shukri, Yahaya, Prof. Madya; Nor Azam, Ramli, Prof. Dr.; Noor Faizah Fitri, Md. Yusof, Dr.; Mohd Mustafa Al Bakri, Abdullah (AENSI Publisher All rights reserved, 2013-10)
      Missing data are often encountered in many areas of research. Complete case analysis and indicator method can lead to serious bias. One of the comforting methods is implementation of imputation methods. The main purpose ...

    • The root caused analysis of leakaged heat exchanger tube 

      Shaiful Rizam, Shamsudin; Mohd Arif Anuar, Mohd Salleh; Azmi, Rahmat, Assoc. Prof. Dr.; Mazlee, Mohd Noor, Dr.; Mohd Harun; Hafizal, Yazid (Carl Hanser Verlag GmbH & Co., 2015-03)
      AISI type 316L stainless steel was used as a heat exchanger tube material in an inter-cooler column. After less than a year of operation, severe corrosion failures occurred and a transverse opening leakage was observed on ...

    • Strength of the weld line and warpage defects on the molded parts in injection molding process 

      S. M., Nasir; Khairul Azwan, Ismail, Dr.; Shayfull Zamree, Abd Rahim; Norshah Afizi, Shuaib (Praise Worthy Prize S.r.l., 2013)
      Strength at weld the line location and warpage problem in injection molding plastic component were not new problems in injection molding industries. Many researchers had emerged with several improvement techniques to reduce ...

    • Strength, density and water absoprtion of Palm oil boiler ash (POBA) geopolymer brick/IBS brick 

      Zarina, Yahya; Kamarudin, Hussin; Mohd Mustafa Al Bakri, Abdullah; Khairul Nizar, Ismail; Rafiza, Abd Razak (Trans Tech Publications Ltd., 2016-01)
      Geopolymer or alkali-activated binder is produced by synthesizing aluminosilicate source materials with an alkaline activator solution. This study has been conducted to produce palm oil boiler ash (POBA) geopolymer brick/IBS ...

    • Structural, chemical bonding, electronic and magnetic properties of KMF₃ (M = Mn, Fe, Co, Ni) compounds 

      Hayatullah; Murtaza, G.; Khenata, R.; Muhammad, S.; Ali Hussain, Reshak, Prof. Dr.; Wong, Kin Mun; Bin Omran, S.; Zeyad A., Alahmed (Elsevier, 2014-04)
      KMF₃ (M = Mn, Fe, Co, Ni) compounds crystallize in the cubic perovskite structure with space group Pm3m (#221) at ambient conditions. Structural, chemical bonding, electronic and magnetic properties of these compounds are ...

    • Structural, elastic, thermal, electronic and optical properties of Ag₂O under pressure 

      Haleem Ud Din; Ali Hussain, Reshak, Prof. Dr. (Elsevier, 2014-02)
      In present paper, the structural, elastic, thermal, electronic, optical properties at ambient and high-pressure study of Ag₂O are performed using the full-potential linearized augmented plane wave (FP-LAPW) method within ...

    • Structural, electronic and optical properties in earth-abundant photovoltaic absorber of Cu₂ZnSnS₄ and Cu₂ZnSnSe₄ from DFT calculations 

      Ali Hussain, Reshak, Prof. Dr.; Nouneh, K.; Kityk, I.V.; Jiri, Bila; Auluck, S.; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Sekkat, Z. (ESG, 2014)
      DFT analyses of band structure dispersion and of contribution of different anionic sub-groups to the studied electronic structure together with the anisotropy of optical functions were performed for the two promising solar ...

    • Structural, electronic, and optical properties of orthorhombic and triclinic BiNbO4 determined via DFT calculations 

      Litimein, F; Rabah, Khenata, Prof. Dr.; Gupta, Sanjeev Kumar, Prof.; Murtaza, Ghulam, Assoc. Prof.; Ali Hussain, Reshak, Prof. Dr.; Abdelmadjid, Bouhemadou; Saad, Binomran; Masood, Yousaf; Jha, Prafulla Kumar (Springer Science+Business Media New York., 2014-11)
      We performed ab initio calculations using the FPLAW method with the local density approximation (LDA) implemented in the WIEN2 k code for the orthorhombic (α) and triclinic (β) phases of BiNbO4. The modified Becke-Johnson ...

    • A study of liberation and separation process of metals from printed circuit boards (PCBS) scraps 

      Aimi Noorliyana, Hashim; Mohd Zaheruddin, Kasmuin; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr. (Trans Tech Publications, 2013-12)
      Since the metallic elements are covered with or encapsulated by various plastic or ceramic materials on printed circuit boards (PCBs), a pre-treatment process allowing their liberation and separation is first needed in ...

    • Study on physical and chemical properties of fly ash from different area in Malaysia 

      Khairul Nizar, Ismail, Assoc. Prof. Dr.; Mohd Mustafa Al-Bakri, Abdullah; Rafiza, Abdul Razak; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Alida, Abdullah; Zarina, Yahya (Trans Tech Publications, 2013-12)
      Fly ash is residue from the combustion of coal which widely available in worldwide and lead to waste management proposal. Moreover, the use of fly ash is more environmental friendly and save cost compared to OPC. Fly ash ...

    • Study on properties and morphology of kaolin based geopolymer coating on clay substrates 

      Che Mohd Ruzaidi, Ghazali, Prof. Madya; Mohd Mustafa Al Bakri, Abdullah; Mohamed, Bnhussain, Prof. Dr.; Siti Salwa, M.S.; Alida, Abdullah; Muhammad Faheem, Mohd Tahir; Azlin, S.S. (Trans Tech Publications, 2013-12)
      The application of geopolymer as a coating was not widely explored by other researchers and therefore the study of kaolin based geopolymer coating applied on different types of clay substrate (unsintered and sintered) was ...

    • Study on radioactivity components, water quality and microstructure characteristic of volcano ash as geopolymer artificial aggregate 

      Rafiza, Abdul Razak; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Sandu, Ion; Djwantoro, Hardjito, Dr.; Zarina, Yahya (SYSCOM 18, 2013-06)
      The assessments of radioactivity, water qualitytesting and microstructure characteristic of volcano ash have been examined. The measurement of the 226Ra, 232Th, 40K, and 238U were carried out using radioactive concentration ...

    • A study on relationship between porosity and compressive strength for geopolymer paste 

      Farah Farhana, Zainal; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Azmi, Rahmat, Prof.; Mohd Mustafa Al-Bakri, Abdullah (Trans Tech Publications, 2013-12)
      This paper presents a study on the relationship between porosity and compressive strength for geopolymer paste. In this research, geopolymer paste was made from fly ash class F based geopolymer mixed with alkaline activator; ...

    • Sulfuric acid attack on ordinary Portland cement and geopolymer material 

      Mohd Izzat, Ahmad; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Sandu, Andrei Victor; Che Mohd Ruzaidi, Ghazali, Prof. Madya; Muhammad Faheem, Mohd Tahir; Moga, Ligia Mihaela (Institute for Scientific Information (ISI), 2013-09)
      The resistance of ordinary Portland cement binder towards acid had been widely discussed by researchers. The deterioration effect of this binder may cost high repair expense and rehabilitation. Geopolymer material is a new ...

    • Surface modification via wet chemical etching of single-crystalline silicon for photovoltaic application 

      Ali Hussain, Reshak, Prof. Dr.; Mukhzeer, Mohamad Shahimin, Dr.; Safizan, Shaari; N., Johan (Elsevier Ltd., 2013-11)
      The potential of solar cells have not been fully tapped due to the lack of energy conversion efficiency. There are three important mechanisms in producing high efficiency cells to harvest solar energy; reduction of light ...

    • Synthesis and characterization of iron produced from iron mill scale 

      Ruhiyuddin, Mohd Zaki; Murizam, Darus; Khairel Rafezi, Ahmad, Dr. (Trans Tech Publications, 2014-01)
      In this project, iron mill scale has been used to produce iron powder that can be used within the Powder Metallurgy process. To achieve this objective, the iron mill scale needs to be refined. This involve the work of ...

    • Tensile and morphological properties of low density polyethylene/ spear grass composites 

      Sam, Sung Ting, Dr.; Santhiya, Peremel; Ragunathan, Santiagoo; Nik Noriman, Zulkepli, Dr.; Hanafi, Ismail, Prof. Dr. (Trans Tech Publications, 2014)
      The spear grass content on the tensile properties, morphology of low-density polyethylene (LDPE)/spear grass was investigated. The compatibilising effect of epoxidised natural rubber (ENR 50) LDPE and spear grass was mixed ...

    • Tensile and morphology properties of polylactic acid/ treated typha latifolia composites 

      Muthmirah, Ibrahim; Jalilah, Abd Jalil; Syarifah Nuraqmar, Syed Mahamud; Yusrina, Mat Daud; Salmah, Husseinsyah, Dr. Ir.; Muhammad Rafi’, Yahya (Trans Tech Publications, 2013-12)
      This paper is focused to investigate the effect of treated natural fiber (typha latifolia) content on tensile and morphology properties of polylactic acid (PLA)/treated typha latifolia (T-TyLa) composites. The composite ...