Engineering Properties of Mortars Incorporating Recycled Fibers from Waste Printed Circuit Boards

DOI: 10.14416/j.ind.tech.2023.06.002

Authors

  • Dhitivajra Siriwattanasanon Department of Civil Engineering, Faculty of Engineering, Thammasat University
  • Burachat Chatveera Department of Civil Engineering, Faculty of Engineering, Thammasat University
  • Gritsada Sua-iam Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Phra Nakhon
  • Nirat Yamoat Department of Civil and Environmental Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok

Keywords:

Mortars, Recycled fiber, Waste printed circuit board, Engineering properties, Thermal conductivity

Abstract

The purpose of this research was to investigate the engineering properties of mortar incorporating recycled fibers from waste-printed circuit boards used as admixtures at varying ratios. The study examined the chemical composition and physical characteristics of the fibers, including particle size gradation, shape, and surface properties, using scanning electron microscopy. Additionally, the study evaluated the fresh and hardened properties of the mortar, such as initial flow, setting time, compressive strength, flexural strength, thermal properties, and heavy metal concentration. The results showed that the majority of recycled fibers from waste electronic circuit boards were cylindrical rods with a diameter of approximately 12-15 mm and lengths ranging from 30 to 200 mm. As the number of recycled fibers from waste printed circuit boards increased in the mortar, the initial flow and setting time increased, while the compressive strength, flexural strength, and thermal conductivity coefficient decreased. Mortars containing 20% recycled fibers from waste electronic circuit boards exhibited the highest compressive strength and flexural strength of 36.35 MPa and 15.66 MPa, respectively, after 28 days. Furthermore, the concentration of heavy metals in the mortar was within the standard specified by the National Environmental Board's notification.

References

https://www.testtech.co.th/th/news/41. (Accessed on 30 October 2022)

A. Khymarn, Effect of waste printed circuit boards (WPCBs) powder on engineering properties of cement paste, Thesis, Thammasart University, Thailand, 2018. (in Thai)

V. Marimuthu and A. Ramasamy, Investigation of the mechanical properties of M40-grade concrete with PCB fiber from recycled electronic waste, Journal of Hazardous, Toxic, and Radioactive Waste, 2023, 27(1), 04022034.

K. Panyawee, S. Kwongpongsagoon, P. Kanjanapiya and C. Tuakta, Study on the properties of cellular lightweight concrete with nonmetallic parts from the process of recycling the remains of electrical circuit boards as an ingredient, The 25th National Civil Engineering Symposium, Proceeding, 2020, STR06, (in Thai)

K. Sriwatanakul, S. Kwongpongsagoon, P. Kanjanapiya and C. Tuakta, Development of pervious concrete with non-metallic part from recycling of printed circuit boards as constituent, The 25th National Civil Engineering Symposium, Proceeding, 2020, STR08. (in Thai)

G. Sau-iam and B. Chatveera, Effect of printed circuit board dust on the workability and mechanical properties of self-compacting concrete: A preliminary study, Case Studies in Construction Materials, 2022, 16, e00862.

Z. Sun, Z. Shen, S. Ma and X. Zhang, Novel application of glass fibers recovered from waste printed circuit boards as sound and thermal insulation material, Journal of Materials Engineering and Performance, 2013, 22, 3140–3146.

TIS 3057-2563, Standard Specification for Self-Leveling Mortar, 2020. (in Thai)

R.S. Mahdi, Experimental study effect of using glass fiber on cement mortar, Journal of Babylon University for Engineering Sciences, 2014, 22(1), 162-181.

J.R. Ferrari, R.V. Silva, D.M. Louzada and I.M. Tinti, Reuse of printed circuit boards substrate in the production of mortars, Technology in Metallurgy, Materials and Mining, 2022, 19, e2656.

B.C. Ban, J.Y Song, J.Y. Lim, S.K. Wang, K.G. An and D.S. Kim, Studies on the reuse of waste printed circuit board as an additive for cement mortar, Journal of Environmental Science and Health, Part A, 2005, 40(3), ESE-200046618, 645-656.

ASTM C150, Standard Specification for Portland Cement, 2012.

ASTM C778, Standard Specification for Standard Sand, 2002.

ASTM C494, Standard Specification for Chemical Admixtures for Concrete, 2017.

ASTM C109, Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens), 2007.

R. Wang, T.F. Zhang, and P.M Wang, Waste printed circuit boards nonmetallic powder as admixture in cement mortar, Journal of Materials and Structures, 2012, 45, 1439–1455.

ASTM C1708, Standard Test Method for Self-Leveling Mortars Containing Hydraulic Cements, 2016

ASTM C348, Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars, 2002.

G. Sau-iam, A. Khymarn, B. Chatveera and N. Makul Cementitious properties of cement paste mixed with laminated powder from electronic waste, Rajamangala University of Technology Srivijaya Research Journal, 2021, 13(3), 676-691. (in Thai)

Quality Standard for Soil, Ministry of Natural Resources and Environment, 2021. (in Thai)

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Published

2023-06-29

Issue

Vol. 19 No. 2 (2023): May-August

Section

บทความวิจัย (Research article)

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

ผลงานวิจัยและบทความวิชาการที่ปรากฏในวารสารนี้ เป็นความคิดเห็นอิสระของผู้เขียน ผู้เขียนจะต้องเป็นผู้รับผิดชอบต่อผลทางกฎหมายใด ๆ ที่อาจจะเกิดขึ้นจากบทความนั้น กองบรรณาธิการและคณะจัดทำวารสารฯไม่จำเป็นต้องเห็นด้วยเสมอไป