Browsing by Author "Rwotber Raymond"

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    Assessing the use of Waste Engine Oil in sandcrete blocks
    (2025-04-16) Rwotber Raymond
    Dampness in sandcrete blocks can lead deterioration of a structure, reduce durability and increase maintenance issues. This study assessed the use of waste engine oil (WEO) as an additive to reduce water absorption in sandcrete blocks. Laboratory experiments determined the physical and chemical properties of WEO and assessed its effect on the compressive strength and water absorption of sandcrete blocks. The results showed that WEO exhibits hydrophobic properties that help limit moisture penetration. The optimum proportion of WEO was found to be 0.5% by weight of cement which effectively reduced the water absorption by 20% and increased the compressive strength by 8%. However, higher concentrations of WEO (≥1.0%) weakened the blocks due to interference with cement hydration process. These results suggest that incorporating WEO in sandcrete block production offers a sustainable and eco-friendly solution for reducing dampness while promoting waste recycling in construction.