International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 07 | July 2022
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
Compressive strength of M40 and M50 grade concrete using metakaolin as admixture Batham Geeta1, Akhtar Saleem2, Rajesh Bhargava3 1PhD
Scholar, UIT-RGPV, Bhopal, India, UIT-RGPV, Bhopal, India, 3 Professor, RGPV, Bhopal, India. -------------------------------------------------------------------------***----------------------------------------------------------------------ABSTRACT- In this research program, high volume ultra-fine fly ash concrete mixes produced with OPC 53 grade cement for 2 Professor,
higher grade M40 and M50. Initially control mix was produced with 100 % OPC cement. Further cement content was reduced by ultra-fine fly ash and Metakaolin and properties were found. The Metakaolin were used in, 10%, 15% and 20 % to enhance the concrete properties and. In such a way overall cement content was reduced up to 60 %. Replacement of cement by UFFA with Metakaolin results in more improved and economical concrete.
Keywords - Ultra-fine fly ash, metakaolin, ordinary portland cement, concrete, compressive strength INTRODUCTION Christy et al. [1] investigated the effect of class-F fly ash for partial replacement of cement and fine aggregate in cement mortar for three different ratios 1:3, 1:4.5 and 1:6. Result showed increase in compressive strength for cement replacement for 1:3 and 1:4.5 mortars and for sand replacement to 1:6 mortar. Satish H. Sathawane et al. [2] conducted experimental study to investigate combined effect rice husk ash and fly ash for cement replacement up to 30 %. Result shows that compressive strength increases by 30.15% in compared with targeted strength and reduces by 8.73% compared with control concrete. Guoqiang Xu et al. [3] investigated the influence of combined admixture of super-fine lime stone powder and low quality fly ash on mortar. Test result indicated that the mortar fluidity increases with increase in the super-fine stone powder. The maximum flexural strength and compressive strength was found 9.8 MPa and 42.2 MPa respectively with 33.3% of limestone powder. Ravande Kishore al. [4] conducted experimental study to investigate the mechanical properties of high strength concrete by replacing ordinary portland cement by 5%, 10% and 15% Rice Husk Ash for grade M40 and M50 The optimum replacement of rice husk ash found to be 10% in both the grades of the concrete. Papayianniet al. [5] produced high-strength using high volumes of industrial by-products in laboratory mixtures. The by-products used are high-calcium (HC) fly ash and ladle furnace (LF) slag as binders and electric arc furnace slag as aggregates. Investigation reported mixtures containing both supplementary cementitious materials and slag aggregates the produced concrete shows high-strength (>70 MPa), good abrasion resistance and fracture toughness. Krishna Murthy N et al. [6] designed a simple tool for SCC with high reactive metakaolin and fly ash as an admixture for cement replacement. They provide detailed steps for mix design with 29% of coarse aggregate with three cement replacement ratio 5-20%(by MK), 10-30% (by FA) and different % combination of MK+FA. Authors developed a user friendly mix design tool which is capable of calculating all quantities required in the mix design.
II OBJECTIVE OF THE STUDY The research was aimed to investigate effect of metakaolin on 7, 28, 56 and 90 days compressive strength for grade M40 and M50
III MATERIALS AND THEIR PROPERTIES Cement OPC 53 grade cement of Ultra tech was used for this research program.
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