Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Civil and Environmental Engineering | en_US |
| dc.contributor.advisor | Leng, Zhen (CEE) | en_US |
| dc.creator | Lan, Jingting | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/10913 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Study on moisture damage of glassphalt containing surface alkali-treated glass aggregates and PET-derived additives | en_US |
| dcterms.abstract | Waste plastics, such as waste polyethylene terephthalate (PET) beverage bottles, and waste glass are two major municipal solid wastes which may cause various environmental problems if not appropriately recycled. Due to the main factor of surface smoothness of glass, the asphalt binder may have a weak bonding capacity with the glass cullet when they are selected as partial alternatives of natural aggregates for preparing mixtures. With regard to the disposal of waste PET, there have been proved that the chemical recycling of waste PET into derived additives as asphalt modifier can play a role to improve the bonding performance between asphalt binder and natural aggregates. However, there exists no knowledge regarding whether the surface coarsening of glass cullet and the binder modification by PET derived additive are able to improve the binder-glass bonding capacity for enhancing the moisture-induced damage resistance of glassphalt. For filling this research gap, this study attempted to adopt two different approaches to prepare glassphalt. One method intended to chemically etch the glass surface for coarsening surface using NaOH solution, and the other is to use the waste PET derived additive to enhance the binder-glass adhesion. In order to reach the research objective, a series of particle size distribution (PSD), Fourier-transform infrared spectroscopy (FTIR), X-ray fluorescence (XRF), and Scanning electron microscope (SEM) tests were first carried out to verify the etching effect of NaOH solution on the coarseness of glass surface. Then, the analyses of FTIR and viscosity were conducted for the PET additive modified binder. Finally, the tension strength ratio and fracture surface of the glassphalt after a freeze-thaw process were conducted to check and analyze the moisture-induced damage resistance. Some main conclusions can be drawn as follows: (1) The results of particle size distribution indicated that the NaOH aqueous solution has potentials to etch the glass surface irrespective of glass size. (2) The FTIR results stated that the chemical treatment of NaOH solution could make the glass surface approaching more hydrophilic. For the modified binder, PET additive physically interacts with the asphalt binder. (3) From the XRF results, some of the reaction products formed on the glass surface can be dissolvable in water and removed by rinsing, and some other sediments will also be formed on the glass surface. (4) The SEM results confirmed that the glass surface is transformed from the smoothness to roughness after treating by NaOH solution. (5) The viscosity results demonstrated that less addition of PET additive into the asphalt binder has almost no effect on the blending of asphalt mixture. (6) The results of moisture damage resistance indicated that the coarsening of the glass surface by NaOH solution provides no bonding enhancement between glass cullet and asphalt binder. By contrast, binder modification by PET additive works significantly. Overall, the chemical treatment of NaOH solution can effectively help coarsen the glass surface as expected, which however provides no potential in improving the moisture damage resistance of glassphalt. For PET derived additive, it is also proved useful to improve the moisture damage resistance of glassphalt. Binder modification by PET additive is recommended to be applied in glassphalt construction. | en_US |
| dcterms.extent | viii, 56 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2020 | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.LCSH | Binders (Materials) -- Testing | en_US |
| dcterms.LCSH | Asphalt -- Additives -- Testing | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 5372.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.01 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/10913