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    POTENTIALS OF DEKINA CASSAVA PEEL ASH IN CONCRETE PRODUCTION
    (3RD INTERNATIONAL CIVIL ENGINEERING CONFERENCE, 2024-02-28) Ismail, S. P; Kolo, D. N; YUSUF, Abdulazeez
    Basic conventional building materials like cement and aggregates are becoming increasingly expensive due to high cost incurred in their processes, production and transportation. The utilization of locally available materials such as cassava peel ash that can either reduce or replace the conventional ones is being considered. Following review paper summarizes the mechanical and durability characteristics of cassava peel ash compared with ordinary Portland cement. The cassava peel ash was obtained by calcinations of cassava peel to 7000 c temperature. The sample was investigated using XRS-FP Analysis, for evaluating the concentration of each component such as SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, K2O Na2O, LoI, the phase composition, mechanical and durability properties evolution. From this review is obvious that significant analytical techniques have been successfully carried out and a significant concentration of 81.14% was obtained. These analyses have shown that natural pozzolan based geopolymer has potential to be used as sustainable building materials. It was discovered that the cassava peel ash contains all the main chemical constituents of cement though in lower percentage compared with OPC which shows that it can serve as a suitable replacement if the right percentage is used. However, its durability and sulphuric acid resistance improved considerably at greater replacement of cement with cassava peel ash. The study recommends that concrete made with cassava peel ash can be used for light construction works where high strength is not major requirement but where durability is a major concern.
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    Evaluation of Shear Bond Strength of Geopolymer Mortar Containing Cassava Peel Ash and Metakaolin
    (School of environmental Technology (SETIC 2020) International conference, 2021-05-03) Wuna, M.A, Nmadu Helen Gogo, Ogunbode, E.B, Mohoro, I.S.
    The cement industry has been recorded to have contributed immensely to the high global carbon dioxide emissions the word is contesting with today. This has made researchers to looked for other sustainable substitutes. One of the possibility substitutes is geopolymer mortar, which has no cement content in it. Geopolymer mortar can be produced using agricultural and industrial wastes like cassava peel ash (CPA), rice husk ash (RHA), metakaolin (MK), fly ash (FA), and many more. Geopolymer have been proven recently to be the way of converting agricultural, thermal and industrial waste into construction repair materials. When comparing Ordinary Portland Cement (OPC) mortar with geopolymer mortar, geopolymer mortar is considered as a highly eco-friendly product. This paper evaluates the compressive and shear bond strength properties of geopolymer mortar manufactured using Cassava Peel Ash (CPA) and Metakaolin (MK). Sodium silicate (Na2SiO3) and 9 molar concentration of sodium hydroxide (NaOH) solution were used as alkaline activator. The mass ratios of sodium silicate to sodium hydroxide (NS: NH) and the binder to fine aggregate (B: A) were fixed to 2.5 and 0.4 respectively. The compressive strength of the synthesized GPM were determined at 3, 7 and 28-days. The compressive strength at 28 days curing was 46.5 N/mm2. Results revealed that 50% replacement of MK with CPA made with 9M concentration of NaoH enhanced the compressive strength of the mortar while 100% CPA content in the mortar demonstrated the highest shear bond strength value. The grooved surface improved the bonding strength. The bond strength results have proven that the surface texture must be considered in determining the bond strength. It is concluded that geopolymer mortar incorporating 100 percent metakaolin could be used in the construction industry with the almost negligible amount of environmental problems.