Nature Environment and Pollution Technology

A. Arun Kumar ¹, A. S. Santhi ¹, G. Mohan Ganesh ¹

Affiliations
1 School of Mechanical and Building Sciences, VIT University, Vellore-632 014, IN

Abstract

This study was aimed to minimize the use of natural river sand which is being used for several years in construction, and to utilize bottom ash from thermal power station as a partial replacement (30%, 60%, 100%) for fine aggregate. An experimental investigation has been carried out to find the compressive strength of the replaced eco-friendly green concrete with different curing methods. An equation recommended by ACI committee for conventional concrete was used to predict 56, 90 and 180 days compressive strength from 28 days compressive strength of the eco-friendly green (bottom ash) concrete that resulted with the difference between the experimental and predicted compressive strength to ± 12%. To minimize the percentage of difference, an empirical relationship was developed between the compressive strength of accelerated curing and normal curing (28, 56, 90, 180 days). It is concluded that empirical relationship predicts later age compressive strength with the minimum percentage of difference. This study of predicting later age compressive strength from empirical relationship will ultimately save time, material and most importantly assessing the quality of the design of construction.

Keywords

Accelerated Curing, Bottom Ash Utilization, Eco-Friendly Green Concrete.

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A. Arun Kumar ¹, R. Senthamizh Selvan ¹

Affiliations
1 School of Mechanical and Building Sciences, VIT University Chennai Campus, Chennai, IN

Abstract

This study is focused to improve strength and durability properties of green concrete with E-waste as fine (10%, 20% and 30%) and coarse aggregates (5%, 10% and 15%) replacement in fibre reinforced green concrete with 30% of ground granulated blast furnace slag (GGBS) for the replacement of cement. Since the reuse of electronic waste and the waste industrial by-product GGBS was used in this study, this also aims to design a green concrete with E-waste. The findings from this study show that E-waste as fine aggregate attained lesser compressive strength, whereas E-waste as coarse aggregate replacement exhibited similar compressive strength compared to control concrete. The results of splitting tensile strength and flexural strength of E-waste as fine and coarse aggregate replacement mixtures were superior to that of normal concrete. The chloride ion penetration of control concrete was low, whereas for E-waste concrete mixtures moderate chloride ion penetration was observed. The overall performance of E-waste as fine and coarse aggregates replacement in compressive strength, splitting tensile strength, flexural strength and chloride ion penetration was due to the combined pozzolanic action of GGBS, increase in the tensile behaviour due to the presence of steel fibres and good bonding of E-waste aggregates.

Keywords

Recycled E-Waste, Green Concrete, GGBS, Mechanical Properties, Chloride Ion Penetration.

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