Effect of Partial Replacement of Fly Ash and Expanded Polystyrene waste on Properties of Geopolymer Concrete Bricks

Authors

  • Jasim Mohammed Abed Department of Building and Construction Technology Engineering, Engineering Technical College / Mosul, Northern Technical University, Iraq
  • Huda Saad Abed Department of Building and Construction Technology Engineering, Engineering Technical College / Mosul, Northern Technical University, Iraq

Keywords:

geopolymer concrete bricks, lightweight, physical properties, mechanical properties, nondestructive tests, combined (SonReb) method

Abstract

The present experimental investigation was mainly focused on two major axes. The first one was the possibility of producing lightweight geopolymer concrete bricks using expanded polystyrene (EPS) waste and fly ash. The second axis was predicting the physical and mechanical properties of the geopolymer concrete bricks using nondestructive testing (NDT) techniques. (NDT) techniques viz Schmidt rebound hammer (RH), ultrasonic pulse velocity (UPV) and ((SonReb)) combined method. The NDT techniques were performed to compare the accuracy between the RH, UPV and ((SonReb)) method in predicting compressive strength of geopolymer concrete bricks. For these purposes, 25 different geopolymer concrete mixes were designed using EPS with different ratios (0, 10, 20, 30, 40 and 50%) as a partial replacement of coarse aggregates and fly ash (class F) by (0, 20, 40, 60 and 80%) as partial replacement of cement. A combination of sodium hydroxide (10M) and sodium silicate solution was used as an alkaline activator with a ratio of Na2SiO3/NaOH kept at 2.0, geopolymer bricks were designed with dimensions of 240 * 120 * 80 mm (6 bricks per mix). The physical and mechanical properties of the geopolymer concrete bricks were studied. Non-destructive testing techniques NDT has been used to predict correlation relationships between UPV, RH and compressive strength of geopolymer bricks. Different empirical formulas were proposed correlating the compressive strength of geopolymer concrete to RH, UPV and combined (SonReb) method. The validity of the empirical formulas was tested and compared with experimental relationships developed by previous researchers.

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Published

2020-12-08

How to Cite

Mohammed Abed, J. ., & Saad Abed, H. . (2020). Effect of Partial Replacement of Fly Ash and Expanded Polystyrene waste on Properties of Geopolymer Concrete Bricks. Journal of Advanced Research in Applied Sciences and Engineering Technology, 17(1), 85–102. Retrieved from https://www.akademiabaru.com/submit/index.php/araset/article/view/1995
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