Assessment of strength and abrasion resistance of elasto-plastic fiber reinforced concrete using geopolymer based recycled aggregates

Year 2021, Volume: 4 Issue: 3, 244 - 248, 30.09.2021

Abdelaziz Y. Mohamed Orhan Canpolat Mukhallad Mohammed Mawlood Al-mashhadanı

https://doi.org/10.35208/ert.938010

Cited By: 2

Abstract

Recycled aggregates and geopolymer binders are green materials contributing to the sustainability of the planet. We investigated the performance of geopolymer concrete using recycled aggregates (fly ash (FA) and ground granulated blast furnace slag (GGBS)) related to their mechanical properties. Geopolymer concrete were prepared by mixing 50% low calcium fly ash, 50% GGBS, sodium hydroxide and sodium silicate solution, Coarse aggregate (Natural coarse aggregate, Recycled coarse aggregate), Fine aggregate (Crushed Sand, Riverbed Sand) and elastoplastic fibers. Recycled aggregate used was obtained locally from Istanbul, Turkey. To explore the efficiency of recycled aggregate, during the production of geopolymer concrete, partial replacement of recycled coarse aggregate with natural aggregate was made in 10, 20, 30, and 40%. To compare the results, geopolymer concrete containing 100% natural aggregates was made. Since concrete gains strength with time after casting, On Day-28 and Day-90, the compressive strength, split tensile strength, and flexural strength of those geopolymer based concrete were examined. Results of the test showed that the compressive strength of 28 and 90 days w.r.t. different ratios was 26.8, 25.3, 24.2, 23.1, 23 MPa, and 30.2, 28.1, 27.0, 25.2, 25.0, 23.0 Mpa respectively, while split tensile strength was 1.9, 1.5, 1.5, 1.4, 1.4 MPa and 2.0, 1.9, 1.9, 1.6, 1.5 MPa respectively, and the ultimate flexural strength of tested beams were in the range of 3.53 to 4.54 MPa. Although the general performance of the produced samples was showing a decrement with the increasing ratio of recycle aggregates, the obtained results indicated that using recycled aggregate is up to some extent of 30% is beneficial in terms of strength.

Keywords

Abrasion properties, Geopolymer concrete, Recycled aggregate, Elasto-plastic fibers, Splitting tensile strength, Sustainability

Supporting Institution

Yildiz Technical University

Project Number

FBA-2019-3558

Thanks

This work was supported by the research fund of the Yildiz Technical University, the authors would like to express their sincere gratitude to scientific research coordination unit for their financial support to the project.

References

• Li, X. (2009). Recycling and reuse of waste concrete in China. Resources, Conservation and Recycling, [online] 53(3), pp.107-112.
• Xiao, J., Li, W., Fan, Y. and Huang, X. (2012). An overview of study on recycled aggregate concrete in China (1996–2011). Construction and Building Materials.
• Davidovits, J., 1994. GEOPOLYMERS: Man-Made Rock Geosynthesis and The Resulting Development of Very Early High Strength Cement. [online] Geopolymer.org.
• Benhelal, E., Zahedi, G., Shamsaei, E. and Bahadori, A. (2013). Global strategies and potentials to curb CO2 emissions in cement industry. Journal of Cleaner Production, 51, pp.142-161.
• P. KUMAR, MEHTA P. (2001). Reducing the environmental impacts of concrete. [online] Ecosmartconcrete.com.
• Shi, X., Collins, F., Zhao, X. and Wang, Q., 2012. Mechanical properties and microstructure analysis of fly ash geopolymeric recycled concrete. Journal of Hazardous Materials, [online] 237-238, pp.20-29.
• Senthal, K., Kumar, H. and Bawa, K., 2019. STUDIES ON MECHANICAL PROPERTIES OF GEOPOLYMER CONCRETE USING RECYCLED CONCRETE AGGREGATE.
• Wang, H., Wang, J., Sun, X. and Jin, W., 2013. Improving performance of recycled aggregate concrete with superfine pozzolanic powders. Journal of Central South University, 20(12), pp.3715-3722.
• Xie, J., Wang, J., Rao, R., Wang, C. and Fang, C., 2019. Effects of combined usage of GGBS and fly ash on workability and mechanical properties of alkali activated geopolymer concrete with recycled aggregate. Composites Part B: Engineering, 164, pp.179-190.
• BS EN 13892-3, 2014 Edition, December 31, 2014 - Methods of test for screed materials Part 3: Determination of wear resistance - Böhme