Application of synthetic wax for improvement of foamed bitumen parameters

Iwański, Marek; Chomicz-Kowalska, Anna; Maciejewski, Krzysztof

doi:10.1016/j.conbuildmat.2015.02.060

Cited by 64 publications

(45 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 4 shows foaming characteristics (expansion ratio -ERm and half-life -HL) of the tested base 35/50 and modified binders with different amounts of foaming water used. Figure 5 [25,26,29].…”

Section: Foamed Bitumen-results and Analysismentioning

confidence: 99%

“…The base bituminous binders (35/50 and 50/70) along with the blends described in [25,26,29] were tested for their foaming characteristics. As shown in [25,26,29], binder modification may lead to significant changes in foaming performance, sometimes leading to inadequate foaming.…”

Section: Foamed Bitumen-results and Analysismentioning

confidence: 99%

“…To adequately assess the bitumen foam properties, the parameters were measured four times for each of the foaming water contents of 1.5%, 2.5% and 3.5%. The dosage was established based on our current experience [25,26,29].…”

Section: Foamed Bitumen-results and Analysismentioning

confidence: 99%

“…Advantages include reduced emissions, saved energy, improved labor conditions and shortened production cycle. At temperatures below the FT wax solidification point (after compaciton), the FT wax lattice structure in the bitumen makes the binder stiffer, thus increasing the resistance of the mixture to permanent deformation (rutting) [23][24][25].…”

Section: Fischer Tropsch Synthetic Waxmentioning

confidence: 99%

“…The content of the FT wax was established on the basis of the authors' original research results and on the findings reported by other researchers [24][25][26].…”

Section: Fischer Tropsch Synthetic Waxmentioning

confidence: 99%

See 4 more Smart Citations

Laboratory testing of low temperature asphalt concrete produced in foamed bitumen technology with fiber reinforcement

Chomicz-Kowalska

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

Abstract. The paper presents the design process and test results of warm mix asphalt concrete produced with modified foamed bitumen and recycled synthetic fiber reinforcement. Recycling and low-temperature asphalt production techniques are now seen as the possibilities to increase the sustainability and energy effectiveness of road construction. Although low processing temperatures permit increased use of reclaimed and recycled materials in new asphalt mixes, they sometimes result in impaired service performance. The aim of this article was to present a possibility of producing a better performing asphalt concrete (in comparison to a control hot-mix) at lower temperatures. For this purpose two road paving bitumens modified with a surface active agent and a Fischer-Tropsch wax thoroughly tested for their basic, rheological characteristics and foaming performance. Selected binders were used for producing two control mixes (hot-mix and foamed warm mix with 35/50 bitumen) as well as the experimental mix with the modified 50/70 bitumen and an addition of synthetic fiber material from recycling of automotive tires. Basic properties of the mixes were tested (air void content, moisture susceptibility with one freeze-thaw cycle, wheel tracking) along with stiffness moduli and fatigue resistance. It was concluded that the control foamed warm-mix performed significantly worse than the hot-mix, while the experimental warm-mix with modified bitumen and fiber additive exhibited increased performance and resistance to fatigue and moisture. Utilization of foamed bitumen with conjunction with certain additives may permit production of bituminous mixes and paving of asphalt at temperatures out of reach of the classic warm mix asphalt techniques. Obtaining adequate compaction and service performance in these techniques requires usually the combined use of surface active agents and low viscosity wax additives. Low temperature asphalt mixes produced and placed at considerably lower temperatures compared to conventional hot mix asphalt require particular attention and adequate compaction because climatic factors (water and frost) as well as traffic loads can have a larger impact on their durability and service life. The extent of this problem increases when acidic aggregates are used and coating them fully and permanently with asphalt binder may be difficult. Premature failure in asphalt containing hydrophilic (acidic) aggregates due to water and frost damage can be prevented by using additives strengthening the adhesion between the bitumen and the aggregates.The use of typical adhesion promoters either alters the interfacial conditions at the aggregate-bitumen phase boundaries or improves the adhesive bond between the two. The first group of modifiers improves the wetting of aggregates by the binder so that it is favored over wetting with water, while the latter increase natural cohesive forces arising from the interaction of electrostatic charges in the bitumen particles and on the aggregate surface. Both these actions lead to the ...

show abstract

Section: Foamed Bitumen-results and Analysismentioning

confidence: 99%

Section: Foamed Bitumen-results and Analysismentioning

confidence: 99%

Section: Foamed Bitumen-results and Analysismentioning

confidence: 99%

Section: Fischer Tropsch Synthetic Waxmentioning

confidence: 99%

“…The content of the FT wax was established on the basis of the authors' original research results and on the findings reported by other researchers [24][25][26].…”

Section: Fischer Tropsch Synthetic Waxmentioning

confidence: 99%

See 3 more Smart Citations

Laboratory testing of low temperature asphalt concrete produced in foamed bitumen technology with fiber reinforcement

Chomicz-Kowalska

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

show abstract

Modified Chitosan as a “Multi‐subtype” Macromolecular Emulsifier for Preparing Asphalt Emulsion

et al. 2019

View full text Add to dashboard Cite

The “Multi‐subtype” macromolecular cationic asphalt emulsifier was synthesized based on chitosan (abbreviated as MCTS) via the ring‐opening reaction and quaternization. Then the structure of the emulsifier was characterized by FTIR and 1H‐NMR spectra. Moreover, the surface tension and critical micelle concentration (CMC) of the MCTS were determined from 298 to 313 K. The CMC and γcmc were 0.064 g L−1 and 38.85 mN m−1 at 298 K, respectively, and the lowest surface tension of the solution reached to 26.09 mN m−1 at 313 K. The tested Hydrophile‐Lipophile Balance (HLB) value of MCTS was 10, which can meet the requirement of asphalt emulsifier. Through emulsification experiments, the emulsifying ability of the MCTS was measured, and the results indicated that the emulsifier exhibited excellent application for asphalt. It may be caused by that the MCTS containing polar bundle groups could enhance the interaction between polar asphaltene and the emulsifier solution. Moreover, the prepared asphalt emulsion was more stable compared to the emulsion prepared by Gemini emulsifier. The demulsification experiments were also correspondingly done for emulsified asphalt. All the results showed that the MCTS has potential applications in the preparation of asphalt emulsion.

show abstract

Iron-polyphenol complex nanoparticles for removal of greenhouse gas emission from bitumen and formation of paraffins

Bhowmik

Barman

Ahmed

2019

Environ Sci Pollut Res

View full text Add to dashboard Cite

Application of synthetic wax for improvement of foamed bitumen parameters

Cited by 64 publications

References 14 publications

Laboratory testing of low temperature asphalt concrete produced in foamed bitumen technology with fiber reinforcement

Laboratory testing of low temperature asphalt concrete produced in foamed bitumen technology with fiber reinforcement

Modified Chitosan as a “Multi‐subtype” Macromolecular Emulsifier for Preparing Asphalt Emulsion

Iron-polyphenol complex nanoparticles for removal of greenhouse gas emission from bitumen and formation of paraffins

Contact Info

Product

Resources

About