Using Biowastes and Nonmetallic Fraction from Printed Circuit Board Waste to Fabricate Ecofriendly Lightweight Cement Blocks
Issued Date
2023-01-01
Resource Type
ISSN
08991561
eISSN
19435533
Scopus ID
2-s2.0-85141069265
Journal Title
Journal of Materials in Civil Engineering
Volume
35
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Materials in Civil Engineering Vol.35 No.1 (2023)
Suggested Citation
Chandeng L., Saphongxay K., Lertworasirikul A., Tuakta C., Kwonpongsagoon S., Jonprateep O. Using Biowastes and Nonmetallic Fraction from Printed Circuit Board Waste to Fabricate Ecofriendly Lightweight Cement Blocks. Journal of Materials in Civil Engineering Vol.35 No.1 (2023). doi:10.1061/(ASCE)MT.1943-5533.0004545 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81861
Title
Using Biowastes and Nonmetallic Fraction from Printed Circuit Board Waste to Fabricate Ecofriendly Lightweight Cement Blocks
Author's Affiliation
Other Contributor(s)
Abstract
The construction sector adversely affects the environment. In this research, biowaste and electronic waste are used as raw materials to produce lightweight cement blocks. Cement-like material was synthesized using cockleshells and rice husk ash as raw materials, and the filler used in the cement blocks primarily consisted of nonmetallic fractions (NMF) of printed circuit board (NMF residue). The NMF residue was characterized by X-ray diffraction and exhibited prominent peaks corresponding to SiO2 and Al(OH)3. Morphological examination of the NMF residue revealed irregularly-shaped particles with an average size of 29.2 μm. The use of NMF residue as fillers adversely affected the compressive strength of the lightweight cement blocks. Nevertheless, when the NMF residue content did not exceed 15 wt.%, the average compressive strength was 3.83-4.63 MPa and the average density was 1.086-1.19 g/cm3, which are within the acceptable ranges specified by the Thai Industrial Standards Institute. The concentrations of hazardous elements, such as Pb, Hg, Cr, Cd, As, Be, and Ni, were in the range 0-220 ppm, below the limits set by the Restriction of Hazardous Substances Directive. This study highlights a synergistic approach to waste utilization in the fabrication of lightweight cement blocks suitable for practical applications.