CONSISTENCY AND WORKABILITY PROPERTIES OF BAKERY ASH IN SELFCOMPACTING CONCRETE FOR SUSTAINABLE CONCRETE INFRASTRUCTURE

Workability, flow and consistency are unique parameters that contribute to the quality and mechanical properties of Self-Compacting Concrete (SCC) in the hardened stage, in a bid not to compromise strength and quality. Workability, flow and consistency can be controlled in the fresh stage of SCC. This research assessed the workability and strength properties of self-compacting concrete using bakery ash as the need for a green approach in concrete technology is paramount in track with the trash to treasure initiative. To achieve the aim of this study, two brands of Portland limestone cement were used in developing twelve (12) concrete samples. The additive was used at 0, 5,10,15,20 and 25% replacement of cement. The flow, segregation and filling ability were investigated using the L-box, V-Funnel and the slump flow apparatus. The result of the experimental research showed that at 10% and above addition of bakery ash, the workability was unsatisfactory using EFNARC specifications. The compressive strength increased up to 10% addition of the bakery ash. However, at higher percentage addition, the strength reduced. The use of this concrete is recommended for the construction of low load bearing concrete infrastructures. The outcome of this research will serve as a guide for engineers, researchers and construction worker on the optimum quantity of this waste in the development of self-compacting concrete with satisfactory rheology.