Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Natural Rubber Latex-Modified Concrete with PET and Crumb Rubber Aggregate Replacements for Sustainable Rigid Pavements

Menglim Hoy
* ORCID logo ,
Bundam Ro
,
Suksun Horpibulsuk
* ORCID logo ,
Thanongsak Yosthasaen
,
Apichat Suddeepong
,
Apinun Buritatum
,
Teerasak Yaowarat
,
Wisanukhorn Samingthong
,
Arul Arulrajah
Version 1 : Received: 10 July 2023 / Approved: 12 July 2023 / Online: 12 July 2023 (12:33:12 CEST)

A peer-reviewed article of this Preprint also exists.

Samingthong, W.; Hoy, M.; Ro, B.; Horpibulsuk, S.; Yosthasaen, T.; Suddeepong, A.; Buritatum, A.; Yaowarat, T.; Arulrajah, A. Natural Rubber Latex-Modified Concrete with PET and Crumb Rubber Aggregate Replacements for Sustainable Rigid Pavements. Sustainability 2023, 15, 14147. Samingthong, W.; Hoy, M.; Ro, B.; Horpibulsuk, S.; Yosthasaen, T.; Suddeepong, A.; Buritatum, A.; Yaowarat, T.; Arulrajah, A. Natural Rubber Latex-Modified Concrete with PET and Crumb Rubber Aggregate Replacements for Sustainable Rigid Pavements. Sustainability 2023, 15, 14147.

Abstract

In this study, various percentage combinations of waste aggregates such as PET and crumb rubber were used to replace coarse and fine aggregates in natural rubber latex (NRL) modified concretes. Engineering properties such as compressive and flexural strengths, modulus of elasticity, and toughness obtained from compressive- and flexural stress-strain curves were investigated. Scanning electron microscopy (SEM) analysis was performed to examine the microstructural properties and to study the strength development of the studied concretes. The results indicated that both the compressive and flexural strengths of NRL-modified concretes with PET and crumb rubber aggregate replacements decreased with increasing replacement ratios. SEM analysis indicated that PET and crumb rubber (hydrophobic and non-polar materials) can affect the microstructure of the studied concrete by creating a weak interface between the aggregate and cement pastes, leading to reducing strength development. With the addition of the NRL additive, the film formation was found to act as a bridge and improved the bond strength of aggregates and hydration products of NRL-modified concrete. Furthermore, the integration of PET and crumb rubber aggregate can enhance the ability of the concrete to absorb energy and improve ductility. It was found that 10% of PET and crumb rubber aggregate replacement can be used for NRL-modified concrete as a rigid pavement, as its compressive and flexural strengths met the minimum requirement specified by the Department of Highways, Thailand. This research helps repurpose waste materials and reduce the environmental footprint of concrete production.

Keywords

PET; Crumb Rubber; Natural Rubber Latex; Sustainable; Concrete; Pavement

Subject

Engineering, Civil Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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