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A study on initial setting time and the mechanical properties of AASC using the PS ball as fine aggregate

  • Avinash. H. TalkeriEmail author
  • A. U. Ravi Shankar
Article

Abstract

India is the second largest producer of cement in the world with an annual production of 455 Million Tonnes (MT) which is expected to reach up to 550MT by 2020. In India, the increased demand for cement in the construction industry is required to meet the needs of infrastructure development. However, the production of Portland cement releases significant amounts of CO2 to the atmosphere. Therefore, it is necessary to look for sustainable solutions for concrete production by the use of supplementary cementitious materials. The alternative replacement for Ordinary Portland Cement (OPC) can be Ground Granulated Blast Furnace Slag (GGBS), Fly-ash, Silica fume, Rice-husk ash, which is the various industrial by-products. In this present work, an attempt was made to develop Alkali Activated Slag Concrete (AASC) using Precious Slag (PS) ball as fine aggregate. The development of AASC was made with GGBS as the principal binder. Mixes were developed with binder content 443 kg/m3, Sodium Silicate (SS)/Sodium Hydroxide (SH) ratio of 1 and their performance when exposed to ambient temperature were studied. Alkali binder ratio (0.3) with 8, 10, 12 and 14M NaOH was selected for all the AASC mixes. The test results showed that the slump values for the different mixes satisfying the MoRTH guidelines for concrete pavements. The AASC mixes have higher compressive strength ranging between 41–64 MPa. The fatigue life of the AASC mix was has improved by the addition of PS ball, at the higher concentration of NaOH.

Keywords

AASC PS ball Molarity Flexure fatigue analysis 

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Notes

Acknowledgements

The authors are thankful to the National Institute of Technology Karnataka, Surathkal for supporting us to carry out this research work.

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Copyright information

© Chinese Society of Pavement Engineering. Production and hosting by Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringNITK SurathkalMangaluruIndia

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