Strength and Durability Properties of Treated Recycled Aggregate Concrete by Soaking and Mechanical Grinding Method: Influence of Processing Technique
- 1 October 2021
- journal article
- research article
- Published by American Society of Civil Engineers (ASCE) in Journal of Materials in Civil Engineering
- Vol. 33 (10), 04021286
- https://doi.org/10.1061/(asce)mt.1943-5533.0003908
Abstract
The use of recycled aggregate (RA) generated from construction and demolition (C&D) waste to produce new concrete would minimize the need for the use of natural aggregate (NA). The authors propose a new hybrid method in the present work by combining presoaking in mild acetic acid followed by mechanical grinding to produce high-quality RA. A total of six different types of treated recycled aggregates (TRAs) [i.e., TRA (0 min), TRA (3 min), TRA (5 min), TRA (7 min), TRA (10 min), and TRA (12 min)] were used to replace NA in an M40 grade control mix to study the influence of TRAs. In this study, various percentages (i.e., 0%, 25%, 50%, 75%, and 100%) of TRAs were used to replace NA in each concrete mix. Experiments were performed to investigate the workability, strength, and durability properties of concrete made with TRAs. Typically, at a 50% replacement level of NA with TRA (7 min), the compressive strength reduced by 7.58%, and the rapid chloride permeability test (RCPT) value increased by 23.74% compared with the control mix. A 50% replacement level of NA with TRA (7 min) is suggested for structural concrete. Based on the present study, 72 h of soaking in mild acetic acid, followed by 7 min of the rotation time, are recommended as an optimum treatment for producing high-quality TRA.Keywords
This publication has 83 references indexed in Scilit:
- Properties of concrete containing recycled construction and demolition wastes as coarse aggregatesJournal of Sustainable Cement-Based Materials, 2013
- Properties of interfacial transition zones in recycled aggregate concrete tested by nanoindentationCement and Concrete Composites, 2013
- Improving the Quality of Recycled Fine Aggregate by Selective Removal of Brittle DefectsJournal of Advanced Concrete Technology, 2012
- Influence of field recycled coarse aggregate on properties of concreteMaterials and Structures, 2010
- Recycled concrete made with different natural coarse aggregates exposed to high temperatureConstruction and Building Materials, 2009
- Diversifying two-stage mixing approach (TSMA) for recycled aggregate concrete: TSMAs and TSMAscConstruction and Building Materials, 2008
- New approach in measuring water absorption of recycled aggregatesConstruction and Building Materials, 2008
- Removal of cement mortar remains from recycled aggregate using pre-soaking approachesResources, Conservation and Recycling, 2007
- Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregatesConstruction and Building Materials, 2004
- Use of recycled concrete aggregate in high-strength concreteMaterials and Structures, 2000