In this experimental investigation, a brief review is presented on high strength concrete by using mineral and chemical admixtures. We have designed high strength concrete of grade M80. We have used all the mineral admixtures, namely, fly ash, blast furnace slag, silica fume and metakaolin, contributed by various reputed industries in India. We have collected all the details of these mineral admixtures from those reputed industries, and a brief introduction of all mineral admixtures is presented in this project work. We have also used superplasticizer (chemical admixture), namely, conflo manufactured by “fosrock chemicals” in Bangalore. We have used this superplasticizer in order to achieve good workability under lower water-cement ratio for high strength concrete such as M80. We have compared the compressive strengths of all these mineral admixtures at their individual replacements and combinations of various percentages. We have also found out the percentage replacements of these mineral admixtures in order to achieve maximum strength. We have presented the results in the form of graphs.

For more than 25 years, concretes with compressive strength in excess of 41 MPa have been used in the construction of high-rise structures. While the availability of HSC was limited initially to a few geographic locations, opportunities to use these concretes at more locations across the US arose. With the increase of these opportunities, material producers accepted the challenge to manufacture concrete with high compressive strengths. Although this technology is developed firstly for use in high-rise buildings, the same technology is now being applied for the concretes for bridge girders and decks. Several research studies have addressed the application of HSC in bridge girders and identified the potential benefits of this approach.

Structural Engineering Journal, Superplasticizers, Mineral admixtures, Compressive strength.