Informatics Publishing Limited

M. Vijaya Sekhar Reddy ¹, I.V. Ramana Reddy ², K. Madan Mohan Reddy ¹, N. Krishna Murthy ³, P. Ramesh ⁴

Affiliations
1 Department of Civil Engineering, Srikalahasteeswara Institute of Technology, Srikalahasti, AP, IN
2 Department of Civil Engineering, Sri Venkateswara University College of Engineering, Tirupati, AP, IN
3 Engineering Department, Yogi Vemana University, Kadapa, IN
4 Department of Civil Engineering, Sri Vidyanikethan Engineering College, Rangampeta, Tirupati, AP, IN

Abstract

Portland cement has been a very satisfactory hydraulic binder for structural applications for a long time now. However there are many new issues stemming from its ever increasing use. Sustainable development today demands development of new concrete technologies, which use less natural resources and energy, and generate less CO2, without compromising on strength and durability properties. Supplementary Cementing Materials (SCMs) such as Flyash, Blast Furnace Slag, Silica Fume and Metakaoline etc., either in singly or in combination, in development of alternate binder systems is thus of economic and ecological significance. In the recent years, use of High Performance Concrete (HPC) in the construction industry as got momentum. For designing HPC, both SCMs and Superplasticizers are essential for the improvement of Workability and Mechanical Properties. The paper presents experimental studies conducted on two grades of HPC mixes of M50 and M60 using mineral and chemical admixtures in various proportions. Overall, the paper highlights the usage of admixtures to achieve high strength concrete mixes and from the experimental investigation it is clear that mineral admixtures contribute effectively a lot not only for achieving durability, also high strength.

Keywords

Supplementary Cementing Materials (SCMs), High Performance Concrete (HPC), Flyash, Blast Furnace Slag, Silica Fume, Metakaoline.

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M. Vijaya Sekhar Reddy ¹, I. V. Ramana Reddy ², K. Madan Mohan Reddy ¹, N. Krishna Murthy ³, T. Venumadhav ⁴

Affiliations
1 Department of Civil Engineering, Sri kalahasteeswara Institute of Technology, Srikalahasti, AP, IN
2 Department of Civil Engineering, Sri Venkateswara University College of Engineering, Tirupati, AP, IN
3 Engineering Department, Yogi Vemana University, Kadapa, AP, IN
4 Department of Civil Engineering, Audi Sankara College of Engineering, Gudur, AP, IN

Abstract

This paper presents the evaluation of mechanical properties of binary blended concrete. Binary blended concrete have been developed by the individual replacement of Supplementary Cementing Materials (SCM's) like Fly-ash, Silica fume and Metakaoline. The results of binary blended concrete are compared with those of control concrete. The main purpose of this investigation is to develop confidence among user agencies in India to use mineral and chemical admixtures in a desirable proportion in most of the construction works. The paper presents experimental studies conducted on M₃₀ grade of concrete using SCMs and chemical admixtures in various proportions. The cubes and cylindrical specimens after de-moulding were stored in curing tanks and on removal of cubes and cylinders from water the compressive strength and split tensile strength were conducted at 7days, 28days, 90 days and 180 days. The test results were compared with individual percentage replacements of SCMs for M₃₀ grade concrete with and without chemical admixture.

Keywords

Supplementary Cementing Materials (SCMs), Binary Blended Concrete, Compressive Strength, Split Tensile Strength, Flyash (FA), Silica Fume (SF), Metakaoline.

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