Development of Mix Design and Correlation Studies Between Mechanical Properties of Ternary Blended High-Strength Concrete

Abstract

AbstractThis experimental investigation presents the results of the mechanical properties of high-strength concrete, whose 28 days compressive strength is higher than 70 MPa. Mix design particulars of M-70 grade high-strength concrete were obtained according to IS 10262:2009 guidelines. To achieve the economy and to improve mechanical properties of control mix, supplementary cementitious materials, namely slag, fly ash, silica fume, and quartz powder, were incorporated in the mix as partial replacement of cement. The water-to-binder ratio for all mixtures was kept as 0.25. Total replacement of cement by cementitious materials was kept constant for all mixes, as 20% by weight of cement. Of all the combinations of cementitious materials, slag and silica fume as 20% replacement of cement performed well with respect to the workability and mechanical properties. Correlation equations were also developed between compressive strength and other mechanical properties and compared with the established equations by the previous researchers.KeywordsSilica fumeSlagFly ashCompressive strengthSplit tensile strengthFlexural strength