International Journal of Science, Engineering and TechnologyAuthors: Nnorli, S.I., Onuamah, P.N., Ubaezuonu C. G
Abstract: Probing the structural integrity of abandoned building projects prior to its continuation and completion is a time and resource consuming task which informed the need to develop a model that will be of help in forecasting concrete strength degradation over time. This research studied three abandoned building projects at Federal Polytechnic, Oko, Anambra State, Nigeria with12, 14 and 10 years of abandonment and exposure to environmental factors. The initial concrete compressive strength of the structural elements in the building were sourced from the Physical Planning Unit of the institution. The current concrete compressive strength of the structural elements in the building were estimated using Non Destructive Test method (Rebound harmer Test) while noting their exposure conditions and number of years of abandonment. With the estimated concrete compressive strength as the dependent variable, the initial concrete compressive strength, number of years of abandonment and exposure conditions as the independent variables a regression model of fcu(t) = 0.5083-0.0331X1+0.9850X2 was developed, tested and to be satisfactory. The study established thatconcrete compressive strength decreases slightly over time when exposed to severe environmental conditions, green growth and developed a model to predict concrete compressive strength degradation over time.
DOI: https://doi.org/10.5281/zenodo.17836926
