An Empirical Study on the Absorption of Carbon Dioxide in OLED-Mixed Concrete through Carbonation Reaction

• Published in: KSCE journal of civil engineering Vol. 24; no. 8; pp. 2495 - 2504
• Main Authors: Kim, Seong-Kyum, Jang, Il-Young, Yang, Hee-Jun
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01-08-2020; Springer Nature B.V; 대한토목학회
• Subjects: Absorption; Binders (materials); Carbon dioxide; Carbon dioxide concentration; Carbonation; Civil Engineering; Concrete; Concrete mixes; Empirical analysis; Engineering; Geotechnical Engineering & Applied Earth Sciences; Glass; Industrial Pollution Prevention; Mixtures; Organic light emitting diodes; Portland cement; Portland cements; Structural Engineering; Substitution reactions; Uptake; X ray analysis; X-ray spectroscopy; 토목공학; Carbonation; Pozzolanic reaction; CO; absorption; Display byproduct; Organic light emitting diode
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-020-0122-2

In this study, the ability to absorb CO
2
in concrete, in terms of carbonation reaction, was evaluated by utilizing organic light emitting diode (OLED) waste glass as a cementitious binder. The substitution level was set 10%, 20%, and 30% by weight of the binder, and water to binder ratio was kept at 0.4 for all mixes. Prior to estimate the concentration of CO
2
uptake, an influence of OLED replacement on pozzolanic reactivity and thus strength development of concrete was investigated. CO
2
absorption was calculated by molar concentration of carbonatable phases and carbonation depth derived from quantitative X-ray analysis and accelerating carbonation test, respectively. As a result, the blended concrete exhibits a higher strength with an increase of OLED replacement ratio due to the pozzolanic reaction, compared to the control specimen. Also, the content of CO
2
uptake for the mixtures was increased with the substitution level of OLED, of which the OLED-mixed concrete was 1.81-2.76 times higher than the ordinary Portland cement (OPC) 100% concrete. This behavior may be attributed to an increased rate of carbonation progress. Therefore, it is concluded that the capacity of CO
2
absorption is improved by the use of OLED glass powder as a cementitious material in a concrete mixture.