Lin, Jiayi and Mo, Kim Hung and Goh, Yingxin and Onn, Chiu Chuen (2023) Potential of municipal woody biomass waste ash in the production of cold-bonded lightweight aggregates. Journal of Building Engineering, 63 (A). ISSN 2352-7102, DOI https://doi.org/10.1016/j.jobe.2022.105392.
Full text not available from this repository.Abstract
Nowadays, increasing biomass wastes are incinerated and then transported to landfills for disposal, which occupies many land resources and causes health problems due to lack of any form of control. Therefore, a novel and green recycling method is urgently needed. In this study, a type of municipal woody biomass waste ash (MWBA) was granulated into a new type of artificial lightweight aggregates by the cold-bonded method. The effects of different water content (20-33%), rotation speed (30, 40, 50, 60 rpm) and rotation angle (30-60 degrees) on the granulation efficiency and particle size fraction (4 mm-10 mm, 10 mm-16 mm, 16 mm-20 mm) of the municipal woody biomass waste ash aggregate (MWBAA) as well as the impact of varying cement content (5, 10, 15, 20%) and curing time (3, 7, 14, 28 days) on the performance of MWBAA were investigated. The MWBAA met the bulk density requirement of lightweight aggregate in EN13055 with bulk density between 841 and 1058 kg/m3. It was also found that 27-29% is the optimum water content for MWBAA manufacturing. The highest granulation efficiency (97.84%), as well as better gradation of MWBAA, could be achieved at a rotation angle of 55 degrees and a rotation speed of 60 rpm. After 28 days of curing, the highest compressive strength of 2.6 MPa was achieved by the MWBAA with 20% cement content. Nevertheless, the porous and irregular shape of the unburned wood ash resulted in higher water absorption (25%), but had negligible effect on the bulk density and strength performance of MWBAA. This study thus provides an alternative solution to effec-tively recycle MWBA and potentially granulate MWBA into lightweight aggregate that can be utilized in concrete.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya, IIRG002B-2020IISS |
| Uncontrolled Keywords: | Biomass waste ash; Artificial lightweight aggregate; Granulation; Cold -bonded aggregate; Aggregate strength |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Civil Engineering Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 27 Nov 2023 05:27 |
| Last Modified: | 27 Nov 2023 05:27 |
| URI: | http://eprints.um.edu.my/id/eprint/39361 |
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