Concrete is the safest and sustainable construction material wh ich is most widely used in the world as it provides superior fire resistance, gains strength over time and gives an extremely long service life. Unfortunately high performance concrete is undoubtedly one of the most innovativ e materials in construction. Its Designing involves the process of selecting suitable ingredients of concrete (water, cement, fine and aggregates and a number of additives like mineral and chemical ad mixture) and determining their relat ive amounts with the objective of producing a high performance concrete of the required, strength, durability, and workab ility as economically as possible. Their proportions have a high influence on the final strength of the product. These relations do not seem to follow a mathematical formu la and yet their knowledge is crucial to optimize the quantities of raw materials used in the manufacture of high performance concrete. Therefore, it would be important to have a tool to numerically model such relationships, even before pro cessing. In this aspect the main purpose of this paper is to predict the compressive strength of the high performance concrete by using classification algorith ms. For building these models, training and testing using the available experimental results for 1030 specimens produced with 8 d ifferent mixture proportions are used. The result fro m this study suggests that weighted Support Vector Machines (wSVM) based models perform remarkably well in predict ing the compressive strength of the concrete mix.
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