Workability of Sasobit Warm Mixture Asphalt

Zhao, Guizhe; Ping, Guo

doi:10.1016/j.egypro.2012.01.196

Cited by 43 publications

(13 citation statements)

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“…4(c) illustrates that optimum PI was identified when the wax content was around 2% when the PI recorded 2.165. Previous researchers have recommended the addition rate of wax to be in the range of 1%-3% by mass of the binder [34]. Others have reported that using more than 4% wax has a harmful impact, causing cracking of asphalt mix at low temperatures [14].…”

Section: Influence Of Wax On Bindermentioning

confidence: 99%

Improving the Temperature Sensitivity of Bitumen for Emergency Pavement Repair

Hawesah

Sadique

Harris

et al. 2021

Period. Polytech. Civil Eng.

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The quality of asphalt pavement maintenance depends on several important factors, including the selection of patching materials and choice of repair technique. Conventional hot mix plants operate to support large paving projects, and economy favors high-volume output. When repairs and maintenance are needed it can be challenging to maintain small quantities of hot bituminous mixtures at a sufficient temperature, especially in the case of winter maintenance and consequently the repair materials cannot be compacted to the desired level in some occasions. The temperature sensitivity plays a significant factor to understand the asphalt pavement failures and indicates how quickly asphalt properties change over time in terms of indices such as penetration index. Therefore, this research aims to develop a polymer-modified binder with reduced temperature sensitivity, and it can be used for hand-laid application in small quantities for emergency winter repair and maintenance. The results showed that the highest penetration index has been achieved by modifying bitumen with 20% rubber and 2% wax, which is reduced the temperature sensitivity by 168%. Additionally, the Fourier Transform Infrared Spectroscopy (FTIR) test and X-Ray Diffraction (XRD) test were conducted to monitor the changes in the chemical composition and identify crystalline phases of polymer modified binder from the aspect of functional groups. It is indicated that the bitumen, rubber, and wax react chemically to build 3D networks that have an interlaced form in the bitumen matrix resulting in reduced temperature sensitivity of the polymer modified binder.

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Section: Influence Of Wax On Bindermentioning

confidence: 99%

Improving the Temperature Sensitivity of Bitumen for Emergency Pavement Repair

Hawesah

Sadique

Harris

et al. 2021

Period. Polytech. Civil Eng.

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“…Abdelgalil et al [7] used a device that employed an electric transducer and heat regulator for evaluating mixing temperature in mixture workability and compatibility by determining the correlation between workability and compatibility. Zhao and Guo [8] 399 ISBN: 978-81-936820-6-7 Proceedings DOI: 10.21467/proceedings.4…”

Section: Warm MIX Asphalt Technologymentioning

confidence: 99%

Effects of Reduction in Construction Temperature on Workability of Warm Mix Asphalt Incorporating Rh-wma Additive

Aburawi

2018

Proceedings of First Conference for Engineering Sciences and Technology: Vol. 2

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Conventional Hot Mix Asphalt (HMA) has been the primary material used in pavement in past decades. Recently, compared to conventional HMA, Warm Mix Asphalt (WMA) has shown great potential and offers benefits not given by HMA, since the WMA can be produced at lower temperatures without affecting pavement performance. The WMA technologies allow a significant reduction in construction temperatures of asphalt mixtures through lowering the viscosity of binders. In WMA, different types of additives are added to the binder depending on the technology used and such addition of these materials brings down the viscosity drastically thus reducing the temperature to which the aggregates and binders have to be heated during mixing and compaction. This study was limited to the effects of construction temperature on the workability performance of WMA incorporating RH-WMA additive. Binder namely 80/100 was used for preparation of all asphalt mixtures and RH-WMA used as warm mix asphalt additive. Asphalt mixtures were prepared using crushed granite aggregate for AC14 wearing course and compacted by using Servopac Gyratory Compactor (SGC). The Leeds Workability Method used to determine the workability index. The results show that increase in construction temperature improves the workability of both WMA and HMA. Workability Index (WI) of mixtures incorporating 3% RH-WMA is slightly higher than mixtures incorporating 2% RH-WMA. The increase in WI is more pronounced at higher RH-WMA contents.

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“…8,26,33,34 Sasobit is produced by Sasol Wax Company in South Africa. 8,[33][34][35][36] According to AASHTO standing committee on highways technical meeting (2005), 23 Sasobit is also produced in Germany. It is derived from the coal gasification process 21,24,33 or natural gas.…”

Section: Sasobit Primary Informationmentioning

confidence: 99%

Performance of warm-mix asphalt in the highway industry

Aziz¹,

Hainin²,

Yaacob

et al. 2014

Materials Research Innovations

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Warm-mix asphalt (WMA) technologies could address the problem of deterioration of roads, reduce escalated energy costs and increase environmental awareness. This technology allows significant reduction in temperature for construction and paving of roads compared to conventional hot-mix asphalt (HMA) paving. In HMA production, the quarry mixing and paving temperatures are equivalent to bitumen's viscosity of 170 and 280 cP, respectively, for a proper coating of aggregates and field paving. But in WMA, the viscosity of bitumen is reduced and increases the workability of the mixture. Sasobit and asphamin are the two major additives used with bitumen or in batching plant for the production of WMA. Besides, complex shear modulus (G*) is used to determine the rutting (G*/Sinδ) and fatigue factors (G*Sinδ) to control the deterioration of roads. A further study is needed to monitor the overall performance of WMA in the context of pavement temperature.

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Workability of Sasobit Warm Mixture Asphalt

Cited by 43 publications

References 0 publications

Improving the Temperature Sensitivity of Bitumen for Emergency Pavement Repair

Improving the Temperature Sensitivity of Bitumen for Emergency Pavement Repair

Effects of Reduction in Construction Temperature on Workability of Warm Mix Asphalt Incorporating Rh-wma Additive

Performance of warm-mix asphalt in the highway industry

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