SOME PHYSICAL AND MECHANICAL PROPERTIES OF CONCRETE MADE FROM PARTIAL REPLACEMENT OF NATURAL AGGREGATES WITH ARTIFICIALLY MANUFACTURED AGGREGATES USING GROUND GRANULATED BLAST FURNACE SLAG (GGBS)

Prasanna Kumar .P, S Suhas ,Ravikumar D,Roopa S, Keshavmurthy M S, Shivam Agarwal

Abstract: The potential use of Ground Granulated Blast Furnace Slag (GGBS) obtained from iron ore plant while producing artificial aggregate has been systematically investigated in this study. GGBS has been used in concrete either as a supplementary cementitious material or as a replacement for fine aggregate. This study deals with the use of GGBS as coarse aggregate by means of its artificial production through the process of aggregation or granulation. Some important mechanical properties of GGBS aggregate was evaluated for its crushing and impact strength and compared with natural aggregates. The resulting aggregates were used as replacement for natural aggregate in concrete. The investigation results suggested that the GGBS aggregate showed a highest aggregate crushing value of 24% and aggregate impact value of 31%. The values obtained are well within the IS code provisions for crushing and impact values for use in structural concrete. The scope of the investigation is limited to generate some mechanical and physical properties for concrete of M20 grade made with various percentages of replacement of natural aggregate by GGBS aggregate up to 40%. The experimental program consisted of casting and testing sixteen concrete mixes for their strength in (i) compression and (ii) pull out strength (Bond strength) and compared with that of concrete made with natural aggregates. The test results confirmed that the partial replacement of GGBS aggregates in concrete reduces the properties such as compressive strength and pull out strength marginally but meets the required strength as per IS 456-2000 to be used as a structural concrete

Keywords: Granulation, aggregation, GGBS, crushing, impact, pull out.

DOI: https://doi.org/10.15623/ijret.2016.0526010