Chlorinated polyolefins for asphalt binder modification

Morrison, G R; Lee, Jin K.; Hesp, Simon A.M.

doi:10.1002/app.1994.070540209

Cited by 40 publications

(18 citation statements)

References 7 publications

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“…DMTA measurements ceased automatically as the temperature rose, once the signal intensity from the transducer fell below a certain sensitivity level, as Figure 4 shows. This happened at 230°C with the 40-pph poly(cis-butadiene) blend when the modulus was 10 3 Pa, but as soon as 25°C for the 40-pph blend of the 2.1M molecular weight PIB when the modulus was still 10 6.5 Pa. Blending in the latter case may have been inadequate, though the low-temperature modulus was enhanced. For the low-molecular-weight PIB mixtures, there was a large tan ␦ (tan ␦ ϭ 0.8) at Ϫ20°C; but the higher molecular weight PIBs (and the butyl rubber) had at that temperature much lower values of tan ␦, even when the weight fractions were the same.…”

Section: Figure 12mentioning

confidence: 81%

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A dynamic mechanical and thermal study of various rubber-bitumen blends

Fawcett

McNally

2000

J. Appl. Polym. Sci.

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Blends of a Nynas 100 penetration-grade bitumen with a cis-polybutadiene, a butyl rubber, three polyisobutylenes of different molecular weights, a chlorinatedpolyethylene, polychloroprene in latex form, and a polyurethane rubber (scrap Lycra) were prepared using a Z-blade masticator mixer at a temperature of about 180°C. The blends contained between 10 and 40 pph (i.e., 9 and 29%) by weight of rubber. They were characterized by fluorescence optical microscopy, differential scanning calorimetry, and dynamic mechanical thermal analysis. The bitumen-rich phases provided the matrix in most of these systems, polymer-rich extensive phases being formed with butyl rubber, and low-and moderate-molecular-weight poly(isobutylenes) when the proportion rose above 30 pph, and for the poly(cis-butadiene) and chlorinated polyethylene system only when the proportion rose above 40 pph, according to the tan ␦ plots. Only glass transitions were associated with polymer-rich phases, and there were some melting transitions from paraffinic wax components ejected from the bitumen-rich phases. Below room temperature the modulus of blends of polybutadiene, chlorinated polyethylene, and the polyurethane rubber were similar to that of the bitumen; but those of the other polymers were stiffer by a factor of 50, perhaps because of a rearrangement of the asphaltenes. The softer blends, particularly the first two named above, had loss processes (with tan ␦ Ͼ 0.5) ranging over 200°C or more.

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Section: Figure 12mentioning

confidence: 81%

“…1 The earliest recorded use was by the Sumerians around 3800 b.c., and the Egyptians used it in their mummification processes. 2,3 However, bitumen is brittle in cold environments and flows readily at temperatures above 45°C.…”

Section: Introductionmentioning

confidence: 99%

A dynamic mechanical and thermal study of various rubber-bitumen blends

Fawcett

McNally

2000

J. Appl. Polym. Sci.

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“…These modified asphalts with such obtained values would proves that, the modified asphalt are less sensitive to temperature than the virgin asphalt resulting in less cracking, at low temperature and less rutting during summer time [37]. However, it seemed that increasing the amount of LDPR in either case (as single pure or as an admixture with CR), caused the PI to exceed the desirable value for pavement construction applications.…”

Section: Penetration Indexmentioning

confidence: 67%

New Study on Improved Performance of Paving Asphalts by Crumb Rubber and Polyethylene Modification

Sulyman¹,

Sienkiewicz²,

Haponiuk³

2013

J Material Sci Eng

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“…Passive polymers do not react with asphalt and only physical crosslinks (steric stabilization) can retard a phase separation [4]. The most common polymers have been used in asphalt modification include (SBS) copolymer, (SBR), tire rubber, (EVA), polyethylene, and others [5][6][7]. Plastomers and elastomers are physically dispersed into asphalt, and swollen in asphaltic continuous phase, with improved mechanical properties due to formation of weak physical interactions between the polymer and asphalt components.…”

Section: Introductionmentioning

confidence: 99%

Improving of Temperature Susceptibility of Asphalt 60/70 using Synthesized Reactive Rubber Nanoparticles for use in Different Climate

Aa¹,

Farag²,

Kandil³

et al. 2017

J Civil Environ Eng

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The use of reactive polymers as modifiers for asphalt appears promising. Asphalt penetration grade 60/70 cannot be used in coating applications for its long drying time at ordinary temperature and for its brittleness at very cold temperature. This material is very cheap as compared to blown asphalt that usually used in industrial applications. This study aims to use reactive polymers in modification of soft asphalt to produce very specific asphaltic material for use in infrastructure applications especially coating instead of highly expensive materials. The new asphaltic material is low cost and has high quality performance at low temperature.To achieve the aim of study, RRNP was used as additive to modify asphalt in percentages of 3, 5, 7 and 10% w/w. The prepared RRNP was then tested for their particles size using DLS and TEM, SEM, 1HNMR. RRNP was used to modify the thermo mechanical properties of asphalt via forming chemical bond, and the changing in mechanical and thermal properties of the mixes as well as the storage stability were studied. Also, the morphology (SEM), thermal characterization (TGA), Dynamic mechanical analysis (DMA), rheological tests, while, the prepared coatings were applied to carbon steel panel and tested for bending, Abarsion test and impact test were detected. Overall, the results show that the chosen modifiers are the best so far in the modification of soft asphalt to suit the industrial applications in different climate conditions.

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Chlorinated polyolefins for asphalt binder modification

Cited by 40 publications

References 7 publications

A dynamic mechanical and thermal study of various rubber-bitumen blends

A dynamic mechanical and thermal study of various rubber-bitumen blends

New Study on Improved Performance of Paving Asphalts by Crumb Rubber and Polyethylene Modification

Improving of Temperature Susceptibility of Asphalt 60/70 using Synthesized Reactive Rubber Nanoparticles for use in Different Climate

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