Methods to prepare polymer modified bitumen samples for morphological observation

Kou, Changjiang; Kang, Aihong; Zhang, Wuhong

doi:10.1016/j.conbuildmat.2015.01.081

Cited by 12 publications

(5 citation statements)

References 12 publications

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“…Bu bilgiye dayanarak, farklı miktarda polimer içeren bitümlerin, içeriklerindeki bağ miktarları göz önünde bulundurulduğunda, yüzey morfolojilerinin de değişken olmasını beklemek mümkündür. Kumar [29,30]. Bu sebeple, kıyaslama yapılabilmesi açısından, her bir numune aynı hazırlama koşullarına maruz bırakılmıştır.…”

Section: şEkil 2 Pmb Içeriğinde Oluşan çApraz Bağların Gösterimiunclassified

Stiren-Butadiyen-Stiren İçeriğinin Bitümün Kırılmış Yüzey Morfolojisine Etkilerinin İncelenmesi

Özdemir

2020

Fırat Üniversitesi Mühendislik Bilimleri Dergisi

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Öz: Ülkemizde ve dünyada en sık kullanılan polimer katkısı Stiren-Butadiyen-Stiren (SBS), bitümlü malzemelerde moleküller arası çapraz bağlanmaları oluşturmakta ve bu da bitüm yapısında yapısal, kimyasal, reolojik ve morfolojik vb. farklılıklara yol açmaktadır. Çalışma kapsamında, Taramalı Elektron Mikroskobu (SEM) kullanılarak Polimer Modifiye Bitümün (PMB) kırılmış yüzey morfolojilerinin farklı oranlarda SBS kullanımıyla değişimleri incelenmiştir. Farklı oranlarda SBS kullanımının bitüm içerisindeki şişme oranları Floresan mikroskop (FM) ve Image J Programı kullanılarak araştırılmış ve sonuçlar bitümün çapraz bağ oluşumları ile ilişkilendirilmeye çalışılmıştır. Ek olarak, numuneler Dönel İnce Film Halinde Isıtma (RTFO) deneyi ve Basınçlı Yaşlandırma Kabı (PAV) kullanılarak uzun dönem yaşlanmaya maruz bırakılmış, moleküller arası bağların zarar görmesi sağlanmış ve bunun yüzey morfolojik görüntüler üzerindeki etkisi incelenmiştir. Sonuç olarak, SBS miktarının %5'den fazla kullanılması durumunda daha yüksek malten içeriğindeki bitümlerin kullanılması gerektiği ve PMB numunelerinin saf bitüme oranla çapraz bağlanmalardan kaynaklı olarak daha pürüzlü kırılmış yüzey morfolojisine sahip olduğu bulunmuştur. Uzun dönem yaşlandırılan numunelerde ise, moleküller arası bağların zayıflamasından kaynaklı olarak daha pürüzlü kırılmış yüzeyler elde edilmiştir.

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Section: şEkil 2 Pmb Içeriğinde Oluşan çApraz Bağların Gösterimiunclassified

Stiren-Butadiyen-Stiren İçeriğinin Bitümün Kırılmış Yüzey Morfolojisine Etkilerinin İncelenmesi

Özdemir

2020

Fırat Üniversitesi Mühendislik Bilimleri Dergisi

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“…In recent years, fluorescence microscopy has played a more significant role in detecting SBS content in modified bitumen [71,72]. Some scholars believe that the percentage of SBS modifier particle area and the ratio between the long and short axes are closely related to the modification effect in the fluorescence micrographs [73,74]. Laukkanen et al expressed the swelling process of SBS by studying the percentage of lighter bitumen components under fluorescence microscopy and observed a continuous SBS-rich network structure [75].…”

Section: Analysis Of the Microscopic Morphology Of Sbs-modified Bitum...mentioning

confidence: 99%

The Modification Mechanism, Evaluation Method, and Construction Technology of Direct-to-Plant SBS Modifiers in Asphalt Mixture: A Review

Xiang

et al. 2023

Polymers

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To further promote the development of research on direct-to-plant SBS-modified asphalt, this article analyzes the development of direct-to-plant SBS modifiers. Starting from the material composition and mechanism of action, common direct-to-plant SBS modifiers were analyzed and classified into four categories based on their mechanism of action, including the instant dissolution principle, intramolecular lubrication principle, non-granulation principle, and vulcanization principle. From the evaluation of the modification effect, the method of studying the performance of direct-to-plant SBS-modified asphalt is summarized, including fluorescence microscopy, AFM technology, and molecular dynamics simulation technology. From the perspective of practical application, the construction process of direct-to-plant SBS-modified asphalt was discussed, including the design stage, raw material preparation stage, mix design stage, and on-site construction stage. The results show that common direct-to-plant SBS modifiers are primarily SBS with a small particle size (less than 200 mesh) or specific model, supplemented by additives (EVA, naphthenic oil, sulfur, petroleum resin, etc.), which improve melting efficiency and lubricity or make it undergo vulcanization reaction, change the proportion of asphalt components, and improve stability. In the evaluation of the modification effect of direct-to-plant SBS-modified asphalt, the disparity of the direct-to-plant SBS modifier is determined by observing the particle residue after dry mixing. Macroscopic indexes of modified asphalt and modified asphalt mixture are used to determine the cross-linking effect of direct-to-plant SBS modifier and asphalt, and the modification mechanism and modification effect of wet SBS modifier are evaluated at the microscopic level. The development of direct-to-plant SBS-modified asphalt should combine the characteristics of direct-to-plant SBS modifiers and the attributes of field application, targeted research, and the development of high-performance direct-to-plant SBS modifiers and complete production technologies applicable to different regions, strengthen the improvement of modification effect evaluation, and form a complete theoretical system.

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“…The SBS additive improves the ductility of the binder compared to virgin asphalt considerably [43,44]. The deterioration of the SBS molecular structure by long term aging [45] makes the deterioration of reclaimed SBS modified asphalt more significant than base asphalt, which could be also reflected by the sharp of creep stiffness for the SBS samples.…”

Section: Low Temperature Performance: Ductility and Creep Stiffnessmentioning

confidence: 99%

Methods to Evaluate the Aging Grades of Reclaimed Asphalt Binder

et al. 2017

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Featured Application: The development of aging grades for reclaimed asphalt binder can be used to guide the design of RAP mixtures. Abstract:The use of reclaimed asphalt pavement (RAP) is of great significance for alleviating the problem of resource waste and land space occupation in the context of asphalt pavement. However, the use rate of RAP is still low in many countries because of limited understanding and no unified recycling guidelines, especially in terms of materials classification and aging grades. In this study, reclaimed asphalt pavements from sixteen different sections in southern China were collected, including with base and polymer modified asphalt (PMA). The performance of the reclaimed asphalt binder (RAB) at low, average and high temperatures was tested, using various methods, to find suitable indexes for categorizing aging grades. The viscosity (135 • C) and penetration (25 • C) were found to distinguish the aging degree of RAB the most consistently, and served as the indices to classify the RAB into different grades. To simplify the evaluation of aging grades, a comprehensive service life was determined using the Analytic Hierarchy Process, taking service years and surface levels into account. As a result, a good correlation was found between comprehensive service life and the aging grades.

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Methods to prepare polymer modified bitumen samples for morphological observation

Cited by 12 publications

References 12 publications

Stiren-Butadiyen-Stiren İçeriğinin Bitümün Kırılmış Yüzey Morfolojisine Etkilerinin İncelenmesi

Stiren-Butadiyen-Stiren İçeriğinin Bitümün Kırılmış Yüzey Morfolojisine Etkilerinin İncelenmesi

The Modification Mechanism, Evaluation Method, and Construction Technology of Direct-to-Plant SBS Modifiers in Asphalt Mixture: A Review

Methods to Evaluate the Aging Grades of Reclaimed Asphalt Binder

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