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Advances in Concrete Construction Volume 11, Number 5, May 2021 , pages 409-417 DOI: https://doi.org/10.12989/acc.2021.11.5.409 |
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Assessment of lightweight recycled crumb rubber-cement composite produced by preplaced method |
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Syed Nasir Shah, Kim Hung Mo, Soon Poh Yap, Azma Putra and Muhammad Nur Othman
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| Abstract | ||
| The incorporation of non-biodegradable tyre waste in cement-based material has gained more interest towards sustainable construction these days. Crumb rubber (CR) from waste tyre is an alternative for sand replacement in low strength applications. Many researchers have studied CR cement-based materials produced by normal mixing (NM) method and reported a significant decrease in compressive strength due to CR. To compensate this strength loss, this research aims to study the innovative incorporation of CR in cement composite via the preplaced mixing (PM) method. In this investigation, cement composite was produced with NM and PM methods by replacing sand with 0%, 50%, and 100% CR by volume. The test results showed no significant difference in terms of densities of cement composite prepared with both mixing methods. However, cement composite prepared with PM method had lower strength reduction (about 10%) and lowered drying shrinkage (about 20%). In addition, the sound absorption coefficient and noise reduction coefficient of CR cement composite prepared by PM method were in similar range as those prepared with NM method. Overall, the results demonstrate that the PM method is promising, and the maximum replacement level of 50% is recommended for CR in the cement composite. | ||
| Key Words | ||
| crumb rubber; sustainability; cement composite; preplaced aggregate; mechanical properties; sound absorption | ||
| Address | ||
| Syed Nasir Shah:Centre for Innovative Construction Technology, Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; Department of Civil Engineering, Faculty of Engineering, Balochistan University of Information Technology, Engineering, and Management Sciences, 87300 Quetta, Pakistan Kim Hung Mo, Soon Poh Yap: Centre for Innovative Construction Technology, Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia Azma Putra, Muhammad Nur Othman: Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Malacca, Malaysia | ||
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