State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites

In the past few decades, there have been numerous attempts to add plastic aggregates composed of polymeric materials to cementitious composites, either as an alternative to using natural aggregates or as fillers and fibers. However, the addition of plastic aggregates often results in cementitious co...

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Autores principales:	Heonseok Lee, Hyeonwook Cheon, Yonghak Kang, Seungjun Roh, Woosuk Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	lightweight aggregate plastic aggregate gamma irradiation irradiated plastic compressive strength Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ac19791dcee44a36aa6fe2f51d58410a
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spelling	oai:doaj.org-article:ac19791dcee44a36aa6fe2f51d58410a2021-11-11T15:23:03ZState-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites10.3390/app1121103402076-3417https://doaj.org/article/ac19791dcee44a36aa6fe2f51d58410a2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10340https://doaj.org/toc/2076-3417In the past few decades, there have been numerous attempts to add plastic aggregates composed of polymeric materials to cementitious composites, either as an alternative to using natural aggregates or as fillers and fibers. However, the addition of plastic aggregates often results in cementitious composites with lower mechanical performance. In this paper, we attempt to address this issue by applying gamma irradiation technology to restore the mechanical performance. We aimed to determine the optimal gamma irradiation and mixing combinations by comparing the experimental results with information summarizing the recent literature related to the use of gamma-irradiated plastic aggregates within cementitious composites. To this end, the effects of changes in the physical and chemical properties of plastics due to irradiation with gamma irradiation on the strength of cementitious composites were evaluated using irradiation doses of 25, 50, 75, and 100 kGy and various plastic materials as key parameters. In the compressive strength test, it was found that adding gamma-irradiated plastic increased the compressive strength of the cementitious composites compared to the nonirradiated plastic. This suggests that the irradiation of plastic aggregates with gamma rays is an effective method to recover some of the strength lost when plastic aggregates are added to cementitious composites. In addition, modifications in the microstructure and chemical properties of the gamma-irradiated plastic were analyzed through SEM and FT-IR analysis, which allowed the determination of the strength enhancement mechanism. The results of this study show the possibility of the state-of-the-art performance improvement method for using plastic aggregate as a substitute for natural aggregate, going further from the plastic performance improvement technology for limited materials and radiation dose presented in previous studies.Heonseok LeeHyeonwook CheonYonghak KangSeungjun RohWoosuk KimMDPI AGarticlelightweight aggregateplastic aggregategamma irradiationirradiated plasticcompressive strengthTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10340, p 10340 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	lightweight aggregate plastic aggregate gamma irradiation irradiated plastic compressive strength Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	lightweight aggregate plastic aggregate gamma irradiation irradiated plastic compressive strength Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Heonseok Lee Hyeonwook Cheon Yonghak Kang Seungjun Roh Woosuk Kim State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites
description	In the past few decades, there have been numerous attempts to add plastic aggregates composed of polymeric materials to cementitious composites, either as an alternative to using natural aggregates or as fillers and fibers. However, the addition of plastic aggregates often results in cementitious composites with lower mechanical performance. In this paper, we attempt to address this issue by applying gamma irradiation technology to restore the mechanical performance. We aimed to determine the optimal gamma irradiation and mixing combinations by comparing the experimental results with information summarizing the recent literature related to the use of gamma-irradiated plastic aggregates within cementitious composites. To this end, the effects of changes in the physical and chemical properties of plastics due to irradiation with gamma irradiation on the strength of cementitious composites were evaluated using irradiation doses of 25, 50, 75, and 100 kGy and various plastic materials as key parameters. In the compressive strength test, it was found that adding gamma-irradiated plastic increased the compressive strength of the cementitious composites compared to the nonirradiated plastic. This suggests that the irradiation of plastic aggregates with gamma rays is an effective method to recover some of the strength lost when plastic aggregates are added to cementitious composites. In addition, modifications in the microstructure and chemical properties of the gamma-irradiated plastic were analyzed through SEM and FT-IR analysis, which allowed the determination of the strength enhancement mechanism. The results of this study show the possibility of the state-of-the-art performance improvement method for using plastic aggregate as a substitute for natural aggregate, going further from the plastic performance improvement technology for limited materials and radiation dose presented in previous studies.
format	article
author	Heonseok Lee Hyeonwook Cheon Yonghak Kang Seungjun Roh Woosuk Kim
author_facet	Heonseok Lee Hyeonwook Cheon Yonghak Kang Seungjun Roh Woosuk Kim
author_sort	Heonseok Lee
title	State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites
title_short	State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites
title_full	State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites
title_fullStr	State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites
title_full_unstemmed	State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites
title_sort	state-of-the-art modification of plastic aggregates using gamma irradiation and its optimization for application to cementitious composites
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ac19791dcee44a36aa6fe2f51d58410a
work_keys_str_mv	AT heonseoklee stateoftheartmodificationofplasticaggregatesusinggammairradiationanditsoptimizationforapplicationtocementitiouscomposites AT hyeonwookcheon stateoftheartmodificationofplasticaggregatesusinggammairradiationanditsoptimizationforapplicationtocementitiouscomposites AT yonghakkang stateoftheartmodificationofplasticaggregatesusinggammairradiationanditsoptimizationforapplicationtocementitiouscomposites AT seungjunroh stateoftheartmodificationofplasticaggregatesusinggammairradiationanditsoptimizationforapplicationtocementitiouscomposites AT woosukkim stateoftheartmodificationofplasticaggregatesusinggammairradiationanditsoptimizationforapplicationtocementitiouscomposites
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State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites

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