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Chiwuzie, A, Dabara, D I, Prince, E M, Ajiboye, B O and Olawuyi, S T (2020) Housing-related attributes and the changing structure of preferences. African Journal of Built Environment Research, 4(1), 37-58.

Gasu, M B (2020) Residents' satisfaction with the use of green infrastructure in Osogbo, Osun State, Nigeria. African Journal of Built Environment Research, 4(1), 1-19.

Ibrahim, A G, Garba, M M, Okoli, O G, Zubairu, I K, Dahiru, D and Usman, J (2020) Properties of reactive powder concrete produced with unrefined metakaolin and gear inner wire. African Journal of Built Environment Research, 4(1), 81-95.

  • Type: Journal Article
  • Keywords: concrete; gear inner wire; reactive powder concrete; un-refined metakaolin
  • ISBN/ISSN:
  • URL: https://doi.org/10.33796/ajober.4.1.05
  • Abstract:
    With the soaring need to use innovative and sustainable materials in the construction industry, a new concrete known as Reactive Powder Concrete (RPC) is currently a material of significant interest globally. The concrete constitutes cement, silica fume (SF), fine sand, quartz sand and fibre as its ingredients. However, the importation of SF and fibre is making RPC production relatively expensive in Nigeria due to their non-availability. This paper examines the effects of unrefined Metakaolin (MK) as substitute to silica fume and Gear Inner Wire (GIW) as fibre on the properties of RPC. RPC specimens produced with up to 30% MK by weight of cement, and a constant GIW content of 0.25% by weight of concrete were subjected to compressive strength, tensile strength and flexural strength tests. Similarly, RPC produced with 20% silica fume as reference was tested. Unrefined MK and GIW have been found to be suitable in the production of RPC. Unrefined MK performs in similar way or slightly better than SF in terms of compressive, tensile and flexural strengths. The GIW positively affect the tensile and flexural strengths of the RPC but negatively affect the compressive strength. The results show that 20% unrefined MK is the optimum content for producing RPC with the compressive, tensile and flexural strengths values of 64.5N/mm², 4.7 N/mm² and 18.7 N/mm² respectively as confirmed by the XRD and SEM results. The use of the unrefined MK and GIW can lead to production of cheaper and sustainable RPC by cutting down importation cost of SF and fibre materials.

Ijaola, I A and Idoro, G I (2020) Modelling the relationship between task characteristics and training of site supervisors in Nigerian construction firms. African Journal of Built Environment Research, 4(1), 59-80.

Kwaghsende, F K (2020) Assessment of social networks in informal solid waste recycling activities and sustainable solid waste management, North Central Nigeria. African Journal of Built Environment Research, 4(1), 21-35.

Olatunji, A, Adama, U, Adoga, A, Ojetunde, I, Adewale, S and Nwuba, C C (2020) Valuing an underperforming agricultural entity in Minna, Nigeria as a specialised property. African Journal of Built Environment Research, 4(1), 97-115.