L-Arginine-Incorporated Cement Mortar as Sustainable Artificial Reefs

Hyun-Min Yang, Nosang V. Myung, Han-Seung Lee and Jitendra Kumar Singh
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Hyun-Min Yang: Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA
Nosang V. Myung: Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA
Han-Seung Lee: Department of Architectural Engineering, Hanyang University, 1271 Sa 3-dong, Sangnok-gu, Ansan 15588, Korea
Jitendra Kumar Singh: Innovative Durable Building and Infrastructure Research Center, Department of Architectural Engineering, Hanyang University, 1271 Sa-3-dong, Sangnok-gu, Ansan 15588, Korea

Sustainability, 2020, vol. 12, issue 16, 1-16

Abstract: L-arginine is one of the amino acids found in plant seeds. In the present study, various amounts (i.e., 3%, 5%, 10%) of L-arginine were added to cement mortar to investigate the compressive strength, workability, leaching behavior, and pH change in distilled and natural seawater, as well as dissolved nitrogen and growth of chlorophyll-a (Chl-a) by immersion in natural seawater. The compressive strength of the cement mortar is decreased with increase in L-arginine content owing to the high flow/slump and air content. A concentration of 10% L-arginine significantly promoted the growth of Chl-a on the cement mortar for up to 56 days of immersion in natural seawater. This is due to the availability of high dissolved nitrogen and pH inside the pores. This study recommends the use of L-arginine in artificial reef structures where marine ecosystems can be maintained.

Keywords: L-arginine; cement mortar; artificial reef; chlorophyll-a; compressive strength; pH (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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