Durability Properties of Fly Ash Slag Based Geopolymer Concrete with Partial Replacement of Recycled Coarse Aggregate

Authors

  • Nella Shiva Kumar  M. Tech (Structural Engineering), Department of Civil Engineering, CMR Institute of Technology kandlakoya, medchal road, Hyderabad, Telangana, India
  • Gone Punneshwar  M. Tech (Structural Engineering), Department of Civil Engineering, CMR Institute of Technology kandlakoya, medchal road, Hyderabad, Telangana, India

Keywords:

Geopolymer; Fly ash & ground granulated blast furnace slag; Recycled coarse aggregate; Construction and demolition waste; Mechanical properties and durability properties

Abstract

Recycled coarse Aggregate (RCA) is sourced from local construction and demolition waste. The RCA is used as a partial replacement of natural coarse aggregate (NCA) in fly ash slag based geo polymer concrete at 0%, 10% , 20% , 30% , 40% and 50% by wt. While the fly ash slag based geopolymer concrete containing 100% NCA is control and is considered as the first series. Fly ash & GGBS is used as the source material for the geo polymer and 10 M sodium hydroxide and sodium silicate alkali activators are used to synthesise the fly ash slag based geopolymer in this study. In all replacements a constant alkali activator to fly ash ratio is used. Durability properties such as sorptivity, water absorption and volume of permeable voids of fly ash slag based geopolymer concrete were also affected by addition of recycled coarse aggregates and these properties increase with percentage replacement increase in RCA contents. The effects of RCA on the measured mechanical and durability properties of fly ash slag based geopolymer concrete follow similar trend in cement concrete. Relations of compressive strength with volume of permeable voids and water absorption of fly ash slag based geopolymer concrete containing RCA are also observed. The feasibility using fly ash slag based GPC and to find out their durability characteristics .GPC was developed using fly ash and GGBS in different percentages by replacing coarse aggregates and the strength & durability characteristics of their new concrete were investigated in order to explain its utilization. In the present research work, flyash slag based geopolymer was used as the binder as a substitute of Portland cement paste to produce concrete. The flyash slag based geopolymer concrete paste binds the loose CA, FA and other loose materials together to form the geopolymer concrete by addition of super plasticizer or not.

References

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2018-04-30

Issue

Volume 4, Issue 4, March-April-2018

Section

Research Articles

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
Nella Shiva Kumar, Gone Punneshwar, " Durability Properties of Fly Ash Slag Based Geopolymer Concrete with Partial Replacement of Recycled Coarse Aggregate, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 4, Issue 4, pp.322-328, March-April-2018.