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Influence of Ternary Mixes on Strength and Durability Properties of Concrete

V. V. Praveen Kumar, Dr. D. Ravi Prasad


The emission of greenhouse gases from cement industry during the production of cement have led to the development of binary, ternary and quaternary blended concretes depending availability of cementitious materials and their combinations used as partial replacement for cement. Incorporation of mineral admixtures act as pozzolanic materials as well as microfillers, thereby the microstructure of hardened concrete becomes denser and improves the strength and durability properties. Newly developed admixtures allow lowering the water/binder ratio to very low-levels without loss of workability.  In this investigation lime sludge is used as a cementitious material. Lime sludge is a by-product obtained from paper industry. Fly ash and Silica fume was considered to develop the triple blended concrete at various levels of replacement level of cement by weight. Present investigation is focused on the effect of ternary mixes on strength and durable properties of concrete containing Lime Sludge, Flyash and silica fume (SF) replacing the cement in different grades of concrete. Fly ash (FA) Class C is used in this study in various proportions (i.e.) 5 to 25%, silica fume by 4% and 10% and Lime sludge by 2.5 to 20% by weight of cement. This investigation aims at a detailed experimental investigation of ternary mix for 30MPa, 50MPa and 70MPa concrete. The results are compared with those of the ordinary cement concrete. Sorpitivity, RCPT were performed on the optimal dosages of Triple blended mix to evaluate the effect on durability. Blended mix has shown better mechanical properties with good durability in all grades. 

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