Recycled Concrete Aggregate for Medium-Quality Structural Concrete
This paper reports an evaluation of the properties of medium-quality concrete incorporating recycled coarse aggregate (RCA). Concrete specimens were prepared with various percentages of the RCA (25%, 50%, 75%, and 100%). The workability, mechanical properties, and durability in terms of abrasion of...
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doaj-5543502a95064d1ead2fbede5bb17fb82021-08-26T14:01:13ZengMDPI AGMaterials1996-19442021-08-01144612461210.3390/ma14164612Recycled Concrete Aggregate for Medium-Quality Structural ConcreteDong Viet Phuong Tran0Abbas Allawi1Amjad Albayati2Thi Nguyen Cao3Ayman El-Zohairy4Yen Thi Hai Nguyen5Department of Civil Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City 70000, VietnamDepartment of Civil Engineering, University of Baghdad, Baghdad 17001, IraqDepartment of Civil Engineering, University of Baghdad, Baghdad 17001, IraqFaculty of Civil Engineering, Tien Giang University, Mỹ Tho 84000, VietnamDepartment of Engineering and Technology, Texas A&M University-Commerce, Commerce, TX 75429, USADepartment of Civil Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City 70000, VietnamThis paper reports an evaluation of the properties of medium-quality concrete incorporating recycled coarse aggregate (RCA). Concrete specimens were prepared with various percentages of the RCA (25%, 50%, 75%, and 100%). The workability, mechanical properties, and durability in terms of abrasion of cured concrete were examined at different ages. The results reveal insignificant differences between the recycled concrete (RC) and reference concrete in terms of the mechanical and durability-related measurements. Meanwhile, the workability of the RC reduced vastly since the replacement of the RCA reached 75% and 100%. The ultrasound pulse velocity (UPV) results greatly depend on the porosity of concrete and the RC exhibited higher porosity than that of the reference concrete, particularly at the transition zone between the RCA and the new paste. Therefore, the sound transmission in the RC required longer times than that in the reference concrete. Moreover, a predictive equation relating the compressive strength to the UPV was developed.https://www.mdpi.com/1996-1944/14/16/4612recycled coarse aggregaterecycled concreteworkabilityultrasound pulse velocitydurabilitywater absorption |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dong Viet Phuong Tran Abbas Allawi Amjad Albayati Thi Nguyen Cao Ayman El-Zohairy Yen Thi Hai Nguyen |
spellingShingle |
Dong Viet Phuong Tran Abbas Allawi Amjad Albayati Thi Nguyen Cao Ayman El-Zohairy Yen Thi Hai Nguyen Recycled Concrete Aggregate for Medium-Quality Structural Concrete Materials recycled coarse aggregate recycled concrete workability ultrasound pulse velocity durability water absorption |
author_facet |
Dong Viet Phuong Tran Abbas Allawi Amjad Albayati Thi Nguyen Cao Ayman El-Zohairy Yen Thi Hai Nguyen |
author_sort |
Dong Viet Phuong Tran |
title |
Recycled Concrete Aggregate for Medium-Quality Structural Concrete |
title_short |
Recycled Concrete Aggregate for Medium-Quality Structural Concrete |
title_full |
Recycled Concrete Aggregate for Medium-Quality Structural Concrete |
title_fullStr |
Recycled Concrete Aggregate for Medium-Quality Structural Concrete |
title_full_unstemmed |
Recycled Concrete Aggregate for Medium-Quality Structural Concrete |
title_sort |
recycled concrete aggregate for medium-quality structural concrete |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-08-01 |
description |
This paper reports an evaluation of the properties of medium-quality concrete incorporating recycled coarse aggregate (RCA). Concrete specimens were prepared with various percentages of the RCA (25%, 50%, 75%, and 100%). The workability, mechanical properties, and durability in terms of abrasion of cured concrete were examined at different ages. The results reveal insignificant differences between the recycled concrete (RC) and reference concrete in terms of the mechanical and durability-related measurements. Meanwhile, the workability of the RC reduced vastly since the replacement of the RCA reached 75% and 100%. The ultrasound pulse velocity (UPV) results greatly depend on the porosity of concrete and the RC exhibited higher porosity than that of the reference concrete, particularly at the transition zone between the RCA and the new paste. Therefore, the sound transmission in the RC required longer times than that in the reference concrete. Moreover, a predictive equation relating the compressive strength to the UPV was developed. |
topic |
recycled coarse aggregate recycled concrete workability ultrasound pulse velocity durability water absorption |
url |
https://www.mdpi.com/1996-1944/14/16/4612 |
work_keys_str_mv |
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_version_ |
1721191813658705920 |