EFFECT OF METAKAOLIN ON COMPRESSIVE STRENGTH OF CONCRETE CONTAINING GLASS POWDER

Duna Samson, Musa Abdullahi, Mohammed Abba-Gana

Abstract: This paper presents the results of the investigation into the effect of metakaolin (MK) on the compressive strength of concrete containing glass powder (GP). Plain mix, binary mixes (containing 10 % GP only by weight of cement) and ternary concrete mixes (containing 10% GP with 5, 10, 15 and 20 % MK by weight of cement ) were produced and cured for 7, 14, 28, 56 and 90 days respectively. A total of ninety (90) cubes were cast and tested for compressive strength. The results showed that generally compressive strength decrease with increase in MK content and increase with prolong curing period. Glass powder concrete cubes made with (5-20) % MK and cured for 56 and 90 days, achieved the 28 days target strength of 25 N/mm2 . The optimum replacement level was observed at G10%M15% cured for 90 days. The data obtained were subjected to regression analysis and analysis of variance (ANOVA) in the MINITAB 16 statistical software. The model developed to predict compressive strength with curing period and MK as predictors was highly significant at 5% level, implying there is no significant difference between the predicted and the experimental values. The coefficients of determination, R2 of 90.44% for the model is reasonably high, indicating a good correlation between the response and the predictor variables.

Keywords: Analysis of variance, Compressive strength, Glass powder, Metakaolin and Regression.

DOI: https://doi.org/10.15623/ijret.2016.0512026