Liyana Ahmad Sofri
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Preferred name
Liyana Ahmad Sofri
Official Name
Liyana, Ahmad Sofri
Alternative Name
Sofri, L. A.
Ahmad Sofri, Liyana
Main Affiliation
Scopus Author ID
56353120600
Researcher ID
M-4720-2019

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  • Publication
    The influence of Sodium Hydroxide concentration on physical properties and strength development of high calcium fly ash based geopolymer as pavement base materials
    (IOP Publishing Ltd., 2020)
    Liyana Ahmad Sofri
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Mohd Rosli Mohd Hasan
    ;
    Yue Yuan H.
    This paper deals with the development of high calcium fly ash based geopolymers. Geopolymer paste was prepared from fly ash alkaline activator solutions using various mix design including molarity of sodium hydroxide used (6-14M) with solid-to-liquid ratio (1.0-3.0) and the sample were curing at ambient temperature. In this paper, flow value, setting time and unconfined compressive strength of high calcium fly ash based geopolymer paste was carried out using flow table equipment, Vicat’s apparatus and compression testing machine to measure the properties caused by high calcium fly ash. It was found that solid to liquid ratio of 2.0 and NaOH molarity of 12M was the best mix design to be applied due to its maximum unconfined compressive strength achieved (up to 19MPa at 28 days) as well as its flow ability of the fresh paste which shown better result compared to other mix designs. High calcium was also found to result in higher strength.
      18  1
  • Publication
    Unconfined compressive strength of various types of pavement base material: a review
    (AIP Publishing, 2020)
    Liyana Ahmad Sofri
    ;
    Mohd Rosli Mohd Hasan
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Yue Yuan H.
    ;
    Acep Hidayat
    ;
    Muhammad Faheem Mohd. Tahir
    In the highway construction industry especially for pavement base material, cement treated material is a conventional method that had been applied. Other than that, there is various types of base can be used such as cement kiln dust, reclaimed asphalt pavement, fly ash, and mine tailings. The usage of this various material can improve the unconfined compressive strength (UCS) of the base it terms of the strength. It was found that the UCS is the important properties to indicate the durability of the base. This paper summarized the material and the result of various types of base materials.
      1  22