the investigation of ‘beestructures in asphalt binders

The Investigation of ‘Bee-Structures in Asphalt Binders

Asphalt binders (bitumen) are used heavily in construction and have been found to possess a unique and complex microstructure that contains ‘bee-structures’. Past literature suggests these structures are composed of waxy materials, thus they should dissolve at higher temperatures into the rest of the asphalt binder.

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The Investigation of 'Bee-Structures' in Asphalt Binders

The asphalt cement in the RAP is reactivated when combined with new pavement, becoming the glue that holds it all together.Asphalt is composed of a binder called bitumen mixed with aggregates (small stones, pebbles, etc.), Bitumen is composed of four components: Saturates, Asphaltenes, Resin, and Aromatics (SARA). 2 The bitumen only accounts ...

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Investigation of 'Bee-Structures' in Asphalt Binders

Apr 25, 2012  Asphalt binders (bitumen) are used heavily in construction and have been found to possess a unique and complex microstructure that contains 'bee-structures'. Past literature suggests these structures are composed of waxy materials, thus they should dissolve at higher temperatures into the rest of the asphalt binder.

get price

Insights into Binder Chemistry, Microstructure ... - Asphalt

Asphalt binders behavior dependency ... Investigation of Low and High Temperature Properties of Plant-Produced RAP Mixtures Phase II, McDaniel and Huber Asphalt compatibility ... Including the bee-structures observed on the surface of asphalt thin-film samples by AFM ...

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Investigation of epoxy‐resin‐modified asphalt binder ...

Feb 15, 2016  EA binders were prepared by the mixture of asphalt, epoxy resin, and a new curing agent (CR) with functional groups. The properties of the EA binder were characterized by their viscosity, tensile strength, elongation at break, compatibility, morphology, glass transition temperature ( T g ), contact angle, and surface free energy.

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An Investigation of the Performance of Hot Mix Asphalt ...

Apr 28, 2016  An Investigation of the Performance of Hot Mix Asphalt (hma) Binder Course Materials with High Percentage of Reclaimed Asphalt Pavement (rap)

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Introduction to the Science of Asphalt Binders – Adventus ...

Jul 19, 2016  The asphalt binder is a viscoelastic material, which acts as a viscous material at high temperatures and reverts to an elastic material at cooler (ambient) temperatures. Key Tests for Asphalt Binders Over the years, the asphalt industry has developed a number of methods for testing asphalt

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Chapter 3 - Asphalt Binders A Manual for Design of Hot ...

Asphalt binders, sometimes referred to as asphalt cement binders or simply asphalt cement, are an essential component of asphalt concreteâ they are the cement that holds the aggregate together. Asphalt binders are a co-product of refining crude petroleum to produce gasoline, diesel fuel, lubricating oils, and many other petroleum products.

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Development of an Asphalt Binder Cracking Device

most unmodified asphalt binders, it does not work as well for certain types of asphalt binders including physically and chemically modified asphalt binders. For this reason, an alternative asphalt binder specification (AASHTO M320 Table 2) was recently adopted. In the alternative specification, the low temperature properties of an asphalt

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the Lubrication Properties of Asphalt Binders

Feb 07, 2020  3. Experimental Investigation In this study, a plain PG58-28 bitumen was used as base binder. A GNP made of a synthetic graphite material with 99.66% carbon and 0.34% ash, characterized by an enhanced surface area equal to 250 m2/g, was added to the asphalt binder in two proportions: 3% and 6% by weight of the binder.

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Recent advances in characterizing the “bee” structures and ...

Recent advances in characterizing the “bee” structures and asphaltene particles in asphalt binders Yuhong Wanga*, Kecheng Zhaob, Fangjin Lia, Qi Gaoc, King Wai Chiu Laic a Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, China b Zhejiang Communications Construction Group Co., Ltd., Zhejiang Province, China

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Investigation of \u27Bee-Structures\u27 in Asphalt Binders ...

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Rheological and Microstructural Investigation of the ...

Feb 16, 2021  There are many studies related to AFM and the aging of asphalt binder which prove that the microstructure of bitumen changes through aging process [31, 33,34,35]. Bee structures, which is the result of wrinkling of very thin surface films on the order of 10 nm thick, characterizes areas of higher and lower stiffness than the surrounding area .

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Insights into Binder Chemistry, Microstructure ... - Asphalt

Asphalt binders behavior dependency ... Investigation of Low and High Temperature Properties of Plant-Produced RAP Mixtures Phase II, McDaniel and Huber Asphalt compatibility ... Including the bee-structures observed on the surface of asphalt thin-film samples by AFM ...

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Investigation of moisture damage resistance of GTR ...

Oct 01, 2015  A slight change in the “bee structures” has been found in the 10% GTR modified binder. However, the “bee-structures” are also found to be uniformly dispersed, which indicates that GTR has been mixed well in asphalt binder. Download : Download full-size image; Fig. 1. AFM images of: (a) PG 64-22, and (b) 10% modified 64-22 binder.

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Investigation of the Microcharacteristics of Asphalt ...

Regarding the microstructure, Cui et al. [15,16] studied the influence of FT cycles in a salt solution on three routine indicators of the rheological property and microstructure of asphalt binder by SEM, and the analysis results showed that the high- and low-temperature performances of the binders were reduced before and after FT cycles.

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(PDF) Evolution of asphalt binder microstructure due to ...

AFM creep indentation analysis of asphalt binders A and B. for a similar phase was distinctly different for each binder; this would be expected given that the two binders were Binder Parameter (unit) Bee Bee casing Interstitial from very different sources and had different chemical A E1 (Pa) 2.66E þ 09 4.12E þ 09 5.25E þ 09 composition and ...

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Influence of asphaltene content on mechanical bitumen ...

used as binder in hot mix asphalt (HMA). Due to its natural origin, there is a significant variability in its composition and material behavior depending on the crude oil source. Moreover, a huge number of molecules with very different chemical structure build up bitumen and makes it one of the most complex L. Eberhardsteiner () B. Hofko M ...

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The Investigation of Microscopic Moisture-Thermal Damage ...

Laboratory Investigation of Recycling for Aged SBS Modified Asphalt Cement Pavements and Materials: Recent Advances in Design, Testing and Construction April 2012 Creep-Recovery Behavior of Asphalt Binders Modified with SBS and PPA

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Measuring Adhesion Between Modified Asphalt Binders and ...

Jan 01, 2016  Adhesion between asphalt binders and aggregates is important to the performance of asphalt mixtures. Polymeric modifiers are added to improve the performance of different binders. Thus, it

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microstructure of bituminous materials as displayed in ...

AFM of the binder part of the asphalt sample under investigation. The phase contrast image shows clearly the presence of crystals with bees inside in the circles (peri phase) within a continuum of perpetuum phase [12]. Figure 5. Phase contrast image of the binder part only showing spiral

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Measuring Adhesion Between Modified Asphalt Binders and ...

Adhesion between asphalt binders and aggregates is important to the performance of asphalt mixtures. Polymeric modifiers are added to improve the performance of different binders. Thus, it is essen...

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Investigation of the bulk and surface microstructure of ...

Abstract Bitumen, the heavy residue of crude oil, can display a rich microscale morphology, including so-called Bee structures. The use of Atomic Force Microscopy (AFM) measurements in literature strongly indicates that the appearance of Bee structures is related to the presence of paraffin wax crystals. Most studies have investigated standard bitumen surfaces when cooling bitumen in an air ...

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Microscale investigation of thin film surface ageing of ...

Mar 20, 2014  Chengwei Xing, Liping Liu, Ming Wang, A new preparation method and imaging parameters of asphalt binder samples for atomic force microscopy, Construction and Building Materials, 10.1016/j.conbuildmat.2019.02.027, 205, (622-632), (2019).

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(PDF) Evolution of asphalt binder microstructure due to ...

AFM creep indentation analysis of asphalt binders A and B. for a similar phase was distinctly different for each binder; this would be expected given that the two binders were Binder Parameter (unit) Bee Bee casing Interstitial from very different sources and had different chemical A E1 (Pa) 2.66E þ 09 4.12E þ 09 5.25E þ 09 composition and ...

get price

Investigation of the Microcharacteristics of Asphalt ...

Regarding the microstructure, Cui et al. [15,16] studied the influence of FT cycles in a salt solution on three routine indicators of the rheological property and microstructure of asphalt binder by SEM, and the analysis results showed that the high- and low-temperature performances of the binders were reduced before and after FT cycles.

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Juan Quiñones - Academia

The Investigation of 'Bee-Structures' in Asphalt Binders more. by Juan Quiñones. Research Interests: Materials Science. Download (.pdf)-by 30-day views-total views-followers.

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Rheological, physicochemical, and microstructural ...

Jun 01, 2021  The main reasons that no bee structures are observed in the unaged asphalt binder relate to asphalt binder covering with a thin layer of FSN as well as no aging effect on asphalt binder.

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Investigation of the bulk and surface microstructure of ...

Abstract Bitumen, the heavy residue of crude oil, can display a rich microscale morphology, including so-called Bee structures. The use of Atomic Force Microscopy (AFM) measurements in literature strongly indicates that the appearance of Bee structures is related to the presence of paraffin wax crystals. Most studies have investigated standard bitumen surfaces when cooling bitumen in an air ...

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microstructure of bituminous materials as displayed in ...

AFM of the binder part of the asphalt sample under investigation. The phase contrast image shows clearly the presence of crystals with bees inside in the circles (peri phase) within a continuum of perpetuum phase [12]. Figure 5. Phase contrast image of the binder part only showing spiral

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The Investigation of Microscopic Moisture-Thermal Damage ...

Laboratory Investigation of Recycling for Aged SBS Modified Asphalt Cement Pavements and Materials: Recent Advances in Design, Testing and Construction April 2012 Creep-Recovery Behavior of Asphalt Binders Modified with SBS and PPA

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The phenomenon of bitumen ‘bee' structures – bulk or ...

DOI: 10.1080/10298436.2020.1823390 Corpus ID: 225010138. The phenomenon of bitumen ‘bee' structures – bulk or surface layer – a closer look @article{Ganter2020ThePO, title={The phenomenon of bitumen ‘bee' structures – bulk or surface layer – a closer look}, author={Domenic Ganter and S. Franzka and V. Shvartsman and D. Lupascu}, journal={International Journal of Pavement ...

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Microscale investigation of thin film surface ageing of ...

Mar 20, 2014  Chengwei Xing, Liping Liu, Ming Wang, A new preparation method and imaging parameters of asphalt binder samples for atomic force microscopy, Construction and Building Materials, 10.1016/j.conbuildmat.2019.02.027, 205, (622-632), (2019).

get price

Measuring Adhesion Between Modified Asphalt Binders and ...

Adhesion between asphalt binders and aggregates is important to the performance of asphalt mixtures. Polymeric modifiers are added to improve the performance of different binders. Thus, it is essen...

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Characteristics and Mechanisms of Asphalt–Filler ...

Asphalt mastic plays an important role in asphalt mixtures for pavement engineering. Understanding the asphalt–filler interaction behavior is essential to improve the pavement performance of asphalt mastics. The objective of this paper was to evaluate the asphalt–filler interaction ability based on macro-rheological measurements and to investigate the asphaltndash;filler interaction ...

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1,2 and Zhiyi Huang 1, - MDPI

Aug 18, 2019  Investigation of the Microcharacteristics of Asphalt Mastics under Dry–Wet and Freeze–Thaw Cycles in a Coastal Salt Environment Qinling Zhang 1,2 and Zhiyi Huang 1,* 1 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310000, China

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Optical characterization of temperature‐ and composition ...

An asphalt mixture is a composite composed of approximately 5% asphalt binder or bitumen and 95% mineral aggregates. Though only a small weight fraction, the bitumen is primarily responsible for a road's mechanical properties, and must be engineered to withstand wide climatic variations.

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Warm Mix Asphalt - an overview ScienceDirect Topics

Feb 01, 2013  James G. Speight PhD, DSC, in Asphalt Materials Science and Technology, 2016 1.2.1.13 Warm Mix Asphalt. Warm mix asphalt concrete is produced by adding either zeolites, waxes, asphalt emulsions, or sometimes even water to the asphalt binder prior to mixing (Johnston et al., 2006; Button et al., 2007; Austerman et al., 2009; Bennert et al., 2010). This allows significantly lower mixing

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