• Vanitha J C

Increasing emphasis is being placed on infrastructure development in India as a result of which, the construction activity has increased by leaps and bounds. The production of cement has also grown to fulfil the constructional needs, which has effect in rapid diminution of earthy resources and created environmental problems due to release of Greenhouse gases. Therefore, to lessen the usage of cement, there is a need for supplementary cementitious materials. From this consideration fly ash, GGBS etc are being used as supplementary cementitious materials. The usage of calcined clay, as metakaolin (MK) in concrete has gotten impressive consideration as of late. On this, a survey has been coordinated to examine the show of metakaolin as substantial replacement material in concrete. Steel slag is a result of steel making processes of steel industry. It’s likewise perhaps of the biggest modern waste which are being created overall in a tremendous amount. With the country facing huge shortage of earthy or river sand and even manufactured sand due to restrictions on quarrying, alternative fine aggregate like slag sand have become attractive in recent years. In the present study, concrete mixes incorporating Metakaolin and steel slag aggregate as partial replacement of cement and sand, respectively were investigated. Of the various experimental design techniques, the Taguchi method of experimental optimization has become very popular and is widely used. In the present study, Taguchi method of experimental design involving L16 orthogonal array was adopted. The control factors selected were water cementitious ratio (w/cm) (0.36 to 0.42), Metakaolin to cementitious ratio (M/cm) (10% to 25%), Steel slag to fine aggregate ratio (SS/FA) (10% to 40%) and 4 levels for each control factor was considered. The fresh and hardened properties of concrete were investigated at 7 and 28days. The test results were compared with the normal concrete mix and the test results indicate that the optimum replacement level of cement by metakaolin is up to 10%, which increases the compressive strength of concrete at 28days. The steel slag sand shows negligible contribution to compressive strength and split tensile strength of the concrete upto 30% beyond which it increases the split tensile strength.

Cement, M-Sand, Fine Aggregate, Taguchi Method, Metakaolin.

" TAGUCHI METHOD STATISTICAL STUDY OF THE OUTCOMES BETWEEN THE CONTROL VARIABLES IN MINITAB SOFTWARE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 2, page no.314-328, February-2018, Available :http://www.jetir.org/papers/JETIR1802347.pdf

" TAGUCHI METHOD STATISTICAL STUDY OF THE OUTCOMES BETWEEN THE CONTROL VARIABLES IN MINITAB SOFTWARE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 2, page no. pp314-328, February-2018, Available at : http://www.jetir.org/papers/JETIR1802347.pdf