Research Article
Using Treated Recycled Demolition Aggregate in Concrete
@INPROCEEDINGS{10.4108/eai.7-9-2021.2315486, author={Safana Qahtan Ragab and Hasan Jasim Mohammed}, title={Using Treated Recycled Demolition Aggregate in Concrete}, proceedings={Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey}, publisher={EAI}, proceedings_a={IMDC-IST}, year={2022}, month={1}, keywords={treated recycled demolition aggregate coarse aggregate naoh cement neat mechanical properties}, doi={10.4108/eai.7-9-2021.2315486} }- Safana Qahtan Ragab
Hasan Jasim Mohammed
Year: 2022
Using Treated Recycled Demolition Aggregate in Concrete
IMDC-IST
EAI
DOI: 10.4108/eai.7-9-2021.2315486
Abstract
The investigation focuses on the mechanical properties of treated recycled demolition aggregate, which was treated in two ways: one by immersing recycled demolition aggregate in NaOH solution for 24 hours and the other soaking in cement neat. The mixes were produced by substituting treated recycled demolition aggregate for 0%, 20%, 40%, and 60% of the coarse aggregate weight in both methods. The cement weight is replaced with 10% silica fume. The following tests were performed: compressive strength, splitting tensile strength, modulus of rupture, and density. Treated recycled demolition aggregate concrete compressive strength and modulus of rupture increased by 61% and 27%, respectively, as the treated recycled demolition aggregate ratio increased. Treated recycled demolition aggregate concrete has a lower tensile strength and density than normal concrete by 17 % and 12.5 %, respectively. Treated recycled demolition aggregate is appropriate for use in concrete and meets all criteria.