PREDICTION OF FLEXURAL STRENGTH OF EXPANDED POLYSTYRENE LIGHTWEIGHT CONCRETE USING SCHEFFE'S MODELJournal: International Journal of Advanced Research in Engineering and Technology (IJARET) (Vol.11, No. 12)
Publication Date: 2020-12-31
Authors : Ubi S. E. Okafor F. O. Mama B. O. Agbor R.B;
Page : 492-503
Keywords : Flexural; Lightweight; Concrete; Polystyrene; Model.;
This research examined the optimization of flexural strength of expanded polystyrene lightweight concrete mix. The work applied Scheffe's optimization technique for a five by two degree polynomial. This linear optimization technique assumed the proportions of the material components of concrete to be variables in, x and that these proportions sum up to a whole, that is, unity. It obtained a mathematical model of the form f (X1, X2, X3, X4, X5) where, j = 1, …5 are proportions of the concrete components namely; cement, sand, polystyrene, coarse aggregates and water/cement ratio. The polystyrene-cement blended proportions were mathematically optimized by using Scheffe's approach and the optimization model developed. The optimal proportion by the program was used prepare beam samples measuring 150mm x 150mm x 750mm which were tested for flexural strength at 28 days and their results were compared with those of a standard 1:2:4 concrete mix.
Other Latest Articles
Last modified: 2021-02-23 16:52:40