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

Now showing items 21-40 of 130

    • 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 ...

    • Mechanical performances of fly ash geopolymer bricks 

      Wan Mastura, Wan Ibrahim; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Prof. Madya Dr.; Mohd Mustafa Al Bakri, Abdullah (American Scientific Publishers, 2013-01)
      Geopolymer is a new class of three-dimensionally networked amorphous to semi-crystalline alumino-silicate materials, and first developed by Professor Davidovits in 1978. Geopolymers can be synthesized by mixing alumino-silicate ...

    • Comparison of original and sintered LUSI mud from East Java, Indonesia as raw material for making a geopolymer 

      Rafiza, Abdul Razak; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Djwantoro, Hardjito, Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr. (American Scientific Publishers, 2013-01)
      This paper presents the characterization of LUSI mud from East Java, Indonesia, as a potential raw material for making a geopolymer. Two types of LUSI mud were analyzed, i.e., original LUSI mud and LUSI mud that had been ...

    • Improving warpage on thin shallow parts in two-plate moulds with conformal cooling channels 

      Shayfull Zamree, Abd. Rahim; Muhammad Syahril, Bahari; Siti Aishah, Adam; Mohd. Nasir, Mat Saad; Nooraizedfiza, Zainon (Praise Worthy Prize S.r.l., 2013-03)
      Nowadays, the trend of consumer products designed is getting smaller and most of cover is made from plastic which was produced by using injection molding process. Thus, the demand of thin shallow plastic parts in global ...

    • 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 ...

    • Theoretical study of the structural, electronic structure, fermi surface, electronic charge density and optical properties of the of LnVO4 (Ln= Sm, Eu, Gd and Dy) 

      Ali Hussain, Reshak, Prof. Dr.; Sikander, Azam (Electrochemical Science Group (ESG), 2013-08)
      We present first-principles calculations of the electronic structure, Fermi surface, electronic charge density and optical properties of LnVO4(Ln= Sm, Eu, Gd and Dy) based on density-functional theory using the local density ...

    • Milled groove square shape conformal cooling channels in injection molding process 

      Shayfull Zamree, Abd. Rahim; Safian bin Sharif, Prof. Dr.; Azlan, Mohd Zain, Dr.; Rozaimi, Mohd. Saad; Ahmad Fairuz, Mansor (Taylor and Francis Group, LLC., 2013-08)
      In designing molds for injection molding process, it is very difficult to achieve efficient cooling with uniform thermal distribution. To overcome these issues, the uses of conformal cooling channels with the uniform ...

    • Copper ion-exchanged channel waveguides optimization for optical trapping 

      Ali Hussain, Reshak, Prof. Dr.; Khor, Kang Nan; Mukhzeer, Mohamad Shahimin, Dr.; Sohiful Anuar, Zainol Murad, Dr. (Elsevier Ltd., 2013-08)
      Optical trapping of particles has become a powerful non-mechanical and non-destructive technique for precise particle positioning. The manipulation of particles in the evanescent field of a channel waveguide potentially ...

    • 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 ...

    • Microstructural analysis of geopolymer and ordinary Portland cement mortar exposed to sulfuric acid 

      Mohd Izzat, Ahmad; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Moga, Ligia Mihaela; Che Mohd Ruzaidi, Ghazali, Prof. Madya; Muhammad Faheem, Mohd Tahir; Sandu, Andrei Victor (Revista De Materiale Plastice, 2013-09)
      The vulnerability of ordinary Portland cement (OPC) concrete to acidic attack is a worrying subject regarding the future durability of this binder. On the other side of binder's technology, the new technology of cement ...

    • MgH2 and LiH metal hydrides crystals as novel hydrogen storage material: Electronic structure and optical properties energy 

      Ali Hussain, Reshak, Prof. Dr. (Elsevier Ltd., 2013-09)
      We have performed a comprehensive theoretical investigation of the electronic band structure, density of states, electronic charge density and optical properties of the novel hydrogen storage material MgH2 and LiH compounds. ...

    • Electronic band structure and specific features of Sm2NiMnO6 compound: DFT calculation 

      Ali Hussain, Reshak, Prof. Dr.; Sikander, Azam (Elsevier BY., 2013-09)
      The band structure, density of states, electronic charge density, Fermi surface and optical properties of Sm2NiMnO6 compound have been investigated with the support of density functional theory (DFT). The atomic positions ...

    • Machining performance of reinforced alumina insert in end milling of AISI 1018 steel 

      Mohd Nor Hakim, Hassan; Mohammad Ikhwan Zaini, Ridzwan; Zainal Arifin, Ahmad, Prof.; Mohd Mustafa Al Bakri, Abdullah; Azman, Ahmad Bakir; Mazlan, Mohamed (Trans Tech Publications, 2013-09)
      The main goal of this work is to investigate the performance of zirconia toughened alumina (ZTA) and ZTA reinforced with magnesium oxide (MgO) used as cutting insert in end milling of AISI 1018 steel with hardness of 27 ...

    • Tensile properties and FTIR analysis of HDPE/soya spent powder in oven aging 

      Sam, Sung Ting, Dr.; Norsri Kurniati, Achmad; Nik Noriman, Zulkepli, Dr.; Santiagoo, Ragunanthan; Hanafi, Ismail (AENSI Publisher All rights reserved, 2013-10)
      This investigation involves pure HDPE and then HDPE with addition of soya spent powder with different weight percentagesbefore and after exposing in the oven aging. The characteristics of pure HDPE and HDPE/ soya spent ...

    • Natural rubber/styrene butadiene rubber/recycled nitrile glove (NR/SBR/rNBRg) ternary blend: Tensile properties & morphology 

      Nik Zakaria, Nik Yahya; Nik Noriman, Zulkepli, Dr.; Hanafi, Ismail; Sam, Sung Ting, Dr.; Santiagoo, Ragunanthan (AENSI Publisher All rights reserved, 2013-10)
      Recycling waste rubber products by utilising them in rubber blends had provided the simplest and most cost-effective ways in solving several environmental issues regarding the abundance of scrap rubbers. Discarded nitrile ...

    • The effect of electrolyte temperature on formation of porous aluminium oxide films in anodising process 

      Juyana, A Wahab         ; Mohd Nazree, Derman, Dr.; Zuraidawani, Che Daud (AENSI Publisher All rights reserved, 2013-10)
      A porous aluminium oxide film formed on aluminium was prepared in a mixed electrolyte of phosphoric acid and acetic acid solution. The morphology, growth and thickness of the film were investigated. The anodising process ...

    • Properties of fresh palm oil fuel ash based geopolymer material 

      Moslih Amer, Salih; Abang Abdullah, Abang Ali, Ir. Prof.; Ramazan, Demirboga; Mohd Mustafa Al-Bakri, Abdullah (American-Eurasian Network for Scientific Information (AENSI), 2013-10)
      In this paper, palm oil fuel ash (POFA) was used as the soul material to produce geopolymer binder. Sodium silicate mixed with sodium hydroxide was used as alkaline activator to activate the palm oil fuel ash. Activator ...

    • 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 effect of gap between plastic leaded chip carrier (PLCC) using computational fluid dynamic (CFD) software, FLUENT™ 

      Mazlan, Mohamed; Anizah, Kalam, Dr.; Nik Rosli, Abdullah, Dr.; Loo, Huck Soo, Prof. Madya Ir. Dr.; Mohd Mustafa Al Bakri, Abdullah; M. S., Abdul Aziz; Khor, C. Y.; Mohammad Amizi, Ayob; Mohd Sukhairi, Mat Rasat (AENSI Publisher All rights reserved, 2013-10)
      This paper presents the effect of gap between Plastic Leaded Chip Carrier (PLCC) by using three dimensional numerical analysis of heat and fluid flow in computer. 3D model of microprocessors is built using GAMBIT and ...

    • The tensile properties and morphology analysis of recycled mattress filled natural rubber compounds 

      Nik Noriman, Zulkepli, Dr.; Mohd Firdaus, Omar; Sam, Sung Ting, Dr.; N. P., Shamni; Lokman Hakim, Ibrahim; Mohd Mustafa Al Bakri, Abdullah (AENSI Publisher All rights reserved, 2013-10)
      The tensile properties and morphology analysis of Recycled Mattress (rMat) filled Standard Malaysian Rubber (SMR L) and Epoxidized Natural Rubber (ENR 50) was successfully studied. The both compounds were prepared by two ...