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Open AccessArticle

High Sulfate Attack Resistance of Reinforced Concrete Flumes Containing Liquid Crystal Display (LCD) Waste Glass Powder

1
Department of Civil Engineering, Kumoh National Institute of Technology, Gumi-si, Gyeongsangbuk-do 39177, Korea
2
Department of Architectural Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(12), 2031; https://doi.org/10.3390/ma12122031
Received: 30 May 2019 / Revised: 18 June 2019 / Accepted: 19 June 2019 / Published: 25 June 2019
(This article belongs to the Special Issue Deformation, Fatigue and Fracture of Materials)
To prevent chemical erosion of concrete and improve chemical resistance, reinforced concrete flumes were manufactured, conforming to the Korean Industrial Standards (KS). Two different sizes of liquid crystal display (LCD) waste glass powder (LWGP) particles were used (i.e., 5 and 12 µm) with two substitution types with cement in concrete (i.e., 10% and 20%). Changes in compressive strength, pore structure, weight, volume, and strength of the concrete flumes after immersion in two sulfate solutions (i.e., Na2SO4 and MgSO4) for 84 and 182 days were measured for sulfate attack resistance. The applicability of the LWGP concrete flume with a 0.5 mm crack width was also evaluated based on the bending strength results. The LWGP5, which has a smaller particle size among LWGPs, filled the smaller pores, thereby reducing the porosity and contributing to the compressive strength gain. Higher volume and weight change ratios for all specimens immersed in MgSO4 solution were found than those immersed in Na2SO4 solution under identical conditions. Flexural loads of all the LWGP concrete flumes with 0.05 mm crack widths were greater than 48.5 kN, as required by the KS code; however, these flexural loads were lower than those of ordinary Portland cement. The applicability was also validated via a flexural test complying with KS. View Full-Text
Keywords: liquid crystal display (LCD); waste glass powder (LWGP); sulfate attack resistance; reinforced concrete flumes; flexural load; Korean industrial standards (KS) liquid crystal display (LCD); waste glass powder (LWGP); sulfate attack resistance; reinforced concrete flumes; flexural load; Korean industrial standards (KS)
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Kim, S.-K.; Hong, W.-K. High Sulfate Attack Resistance of Reinforced Concrete Flumes Containing Liquid Crystal Display (LCD) Waste Glass Powder. Materials 2019, 12, 2031.

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