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Articles by M.F. Nuruddin
Total Records ( 2 ) for M.F. Nuruddin
  A.E.A. Elshekh , N. Shafiq , M.F. Nuruddin and A. Fathi
  High amount of steel reinforcement content, durability and ductility issues has led the development of alternative types for reinforcement of high strength concrete HSC. Fiber Reinforcement (FR) of concrete has been investigated as strengthening materials with different techniques such as external and bar reinforcement. This is due to high contributions of the FR on the mechanical properties of HSC such as high compressive strength, toughness and ductility. Among the many types of FR have been used for this purpose, there are very few studies were conducted on developing new continuous basalt fiber in HSC. The main objective of this study is to investigate the effect of chopped basalt stands CBFS on the fresh and harden properties of HSC as a new internal strengthening material. This was done by changing of CBFS content in the mixture and comparing with 100% OPC of HSC. Experimental results showed that the workability of HSC affected negatively with increase of CBFS content. It is also shown that the early and long terms of compressive strength was not supported using the CBFS. Whereas, split and flexural tensile strengths were significantly improve. It was also observed that the brittleness was significantly decreased and its toughness and ductility were steadily improved. Therefore, it can be conducted that the CBFS is a suitable strengthening material to produce ductile HSC.
  R.H. Abdul Rahim , K.A. Azizli , Z. Man , T. Rahmiati and M.F. Nuruddin
  Alkali activator and materials rich in Si and Al are the requirements for the geopolymer synthesis. The common activator use is sodium hydroxide with silicate solution. There is limited literature on the mechanical property of geopolymer in the absence of silicate solution. In this study, fly ash was used as the raw material to provide Si and Al and sodium hydroxide (NaOH) as the only activator for the synthesis of geopolymer. This study describes the effect of varying the sodium hydroxide concentration with respect to curing time and temperature on mechanical properties of non-sodium silicate fly ash based geopolymer. The samples were prepared by mixing fly ash with 8, 10 and 12 M of NaOH concentration and cured in room temperature and 60°C for 1, 7 and 28 days. The highest alkali concentration of 12 M showed the fastest setting time and the highest compressive strength regardless of days of curing. The highest compressive strength obtained for curing at 60°C was 59.81 MPa and 45 min was recorded for the setting time. Meanwhile, at room temperature, the highest strength obtained was 17.71 MPa and 248 min for setting time.
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