Asphalt concrete modification with waste PMMA/ATH

Šušteršič, E.; Tušar, Marjan; Valant, A. Zupančič

doi:10.1617/s11527-013-0152-z

Cited by 13 publications

(3 citation statements)

References 16 publications

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“…It has been considered in this study because of the brittleness of Poly(Methyl Methacrylate) and the low T g of P(MMA/n-BMA)(while T g of pure PMMA is around 105 °C). Although pure PMMA has been compared to concrete because of its brittle behaviour [37] and has been incorporated as a waste material in asphalt mixes, no other application of P(MMA/n-BMA) in civil engineering is known by the authors [38][39][40].…”

Section: Extrusion Of the Capsulesmentioning

confidence: 99%

Design of polymeric capsules for self-healing concrete

Hilloulin

Tittelboom

Gruyaert

et al. 2015

Cement and Concrete Composites

186

107

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Up to now, glass capsules, which cannot resist the mixing process of concrete, have been mostly used in lab-scale proof-of-concept to encapsulate polymeric agents in selfhealing concrete. This study presents the design of polymeric capsules which are able to resist the concrete mixing process and which can break when cracks appear. Three different polymers with a low glass transition temperature T g have been extruded: Poly(lactic acid) (PLA) (T g = 59 °C), Polystyrene (PS) (Tg = 102 °C) and Poly(methyl methacrylate/n-butyl methacrylate) (P(MMA/n-BMA)) (Tg = 59 °C). After heating the capsules prior to mixing with other components of the mix, to shift from a brittle state to a rubbery state, their survival ratio considerably increased. Moreover, a part of the capsules, which previously survived the concrete mixing process, broke with crack appearance. Although some optimization is still necessary concerning functional life of encapsulated adhesives, this seems to be a promising route.

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Section: Extrusion Of the Capsulesmentioning

confidence: 99%

Design of polymeric capsules for self-healing concrete

Hilloulin

Tittelboom

Gruyaert

et al. 2015

Cement and Concrete Composites

186

107

View full text Add to dashboard Cite

show abstract

“…In another study, laboratory tests of modified asphalt concrete with aluminum and polymer waste composite affect pavement mixtures. Waste powder largely replaced fine aggregate fraction in the dry process [13]. Another study indicated that recycled concrete aggregate could replace coarse aggregate, and aluminum filings can partly replace fine aggregate in hot asphalt mixes.…”

Section: Introductionmentioning

confidence: 99%

Appraisal of Asphalt Mixtures’ Cracking Resistance Modified with Waste Aluminum Scrap Powder (WASP) at Intermediate Temperatures

Al-Obaidi,

Abed

2023

E3S Web Conf.

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Considering that most asphalt concrete pavement distresses are fracture-related, evaluating and quantifying mix fracture properties is essential to improved pavement design. Therefore, the first step of the study, a pre-development phase, determines the optimal value for adding waste aluminum scrap powder (WASP) with a fraction size of 2.36-0.075 mm to mixes. Based on previous digital image analysis (DIA), AlDoz and AlNibaa’e aggregates were selected from seven central, northern, and southern Iraq sources. The second post-development phase studies the testing factors of a reliable and practical semi-circular bending (SCB) test for assessing asphalt concrete mixture fracture properties at intermediate service temperatures. The development and calibration of the Marshall System into the SCB-Tester, which switched from analog to digital and computerized control, accurately predicted reference and modified mix fracture characteristics at 50.8 mm/min. Three notch lengths (25, 32, and 38) mm were selected to be studied. Five percentages of WASP (0.5, 1.0, 1.5, 2.0, and 2.5) percent were added by weight to the entire mix and compared to the reference mixture. Results indicate that 1.5% WASP decreases fracture severity and stiffen AlNibaa’e and AlDoz mixes. Increased fracture strength and toughness of modified mixes relative to the reference may dramatically increase asphalt concrete fracture resistance. Even though a higher evaluation for AlNibaa’e mixes than AlDoz with an expected difference, the impact of modifying appears to be an effective influence for AlDoz mixes with determination factors (R2) of 0.9788 and 0.9889 than that of AlNibaa’e modified coarse and fine mixes, which have R2 of 0.8535 and 0.8461, respectively.

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“…The recycling of PMMA waste has been assessed by different methods, including its direct reuse in the production of new polymers [13] and asphalt mixtures [14], and its mechanical [9,15,16] and chemical [9,11,[17][18][19] recycling. Whereas the direct reuse of PMMA waste usually requires clean and uncontaminated streams, its mechanical recycling may allow for the processing of waste streams containing other types of plastics, however it usually results in polymers with inferior properties [8,15].…”

Section: Introductionmentioning

confidence: 99%

Modelling the chemical recycling of crosslinked poly (methyl methacrylate): Kinetics of depolymerisation

Ros

Braido

Castro

et al. 2019

Journal of Analytical and Applied Pyrolysis

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Whereas increasing plastic solid waste production constitutes one of the main challenges of modern society, mainly due to the lack of suitable recycling technologies, chemical recycling represents an attractive solution for the conversion of plastic solid waste into valuable chemical intermediates. Herein, a kinetic model for the pyrolysis of a dental industry waste, ethylene glycol dimethacrylate (EGDMA) crosslinked poly (methyl methacrylate) (PMMA), is presented for the first time. Kinetics parameters and their statistical significance have been estimated from eight non-isothermal thermogravimetric analysis (TGA) experiments with heating rates varying between 5 and 50 °C•min-1 by using nonlinear regression. Our analysis indicates that the mechanism of depolymerisation of EGDMA crosslinked PMMA is likely to involve a consecutive reaction pathway involving two steps. The developed kinetic modelcontaining five kinetic parameters only-was able to predict well all non-isothermal TGA runs, and was validated against isothermal TGA experiments at 400 °C.

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Asphalt concrete modification with waste PMMA/ATH

Cited by 13 publications

References 16 publications

Design of polymeric capsules for self-healing concrete

Design of polymeric capsules for self-healing concrete

Appraisal of Asphalt Mixtures’ Cracking Resistance Modified with Waste Aluminum Scrap Powder (WASP) at Intermediate Temperatures

Modelling the chemical recycling of crosslinked poly (methyl methacrylate): Kinetics of depolymerisation

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