Effects of Gilsonite on performance properties of bitumen

IF 0.8 4区工程技术 Q4 ENGINEERING, CIVIL

Teknik Dergi Pub Date : 2020-09-28 DOI:10.18400/tekderg.783300

P. Ahmedzade, O. AlQudah, Taylan Günay, T. Geçkil

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Abstract

The effectiveness of natural Gilsonite on the performance properties of modified bitumens was studied. Three samples having different ratios of Gilsonite that are 6%, 8% and 10% by weight of base bitumen which was PG 64-16 grade were prepared. The physical properties and storage stabilities of four samples were investigated by means of conventional tests. The short-term and long-term aging processes of bitumens were conducted with rolling thin oven and pressure aging vessel tests, respectively. Rheological properties of bitumens were examined by means of Superpave tests such as rotational viscosity, dynamic shear rheometer and bending beam rheometer. After the rheological study, the low and high temperature performance classes of bitumens were determined by the Superpave specification. The results showed that natural Gilsonite-modified bitumens provide improvement in rheological and physical properties of bitumen, and were found highly compatible with base bitumen. Gilsonite additive significantly increased stiffness and viscosity of bitumen, and improved the resistance against fatigue cracking and rutting of bitumen, without causing a reduction in thermal cracking resistance of bitumen.

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Gilsonite对沥青性能的影响

研究了天然Gilsonite对改性沥青性能的影响。制备了三种不同比例的Gilsonite样品，分别为PG 64-16级基础沥青重量的6%、8%和10%。采用常规试验方法对四种样品的物理性质和贮存稳定性进行了研究。采用滚动薄烘箱和压力老化容器分别对沥青进行了短期和长期老化试验。采用Superpave旋转粘度仪、动态剪切流变仪和弯曲梁流变仪对沥青的流变特性进行了研究。通过流变学研究，根据Superpave规范确定了沥青的低温和高温性能等级。结果表明，天然gilsonoil改性沥青改善了沥青的流变性能和物理性能，并与基础沥青具有良好的相容性。Gilsonite添加剂显著提高了沥青的刚度和粘度，提高了沥青的抗疲劳开裂和车辙性能，而不降低沥青的抗热裂性。

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来源期刊

Teknik Dergi 工程技术-工程：土木

自引率

30.80%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Teknik Dergi is naturally confined with the subjects falling in the area of civil engineering. However, the area of civil engineering has recently been significantly enlarged, even the definition of civil engineering has somewhat changed. Half a century ago, engineering was simply defined as “the art of using and converting the natural resources for the benefit of the mankind”. Today, the same objective is expected to be realised (i) by complying with the desire and expectations of the people concerned and (ii) without wasting the resources and within the sustainability principles. This change has required an interaction between engineering and social and administrative sciences. Some subjects at the borderline between civil engineering and social and administrative sciences have consequently been included in the area of civil engineering. Teknik Dergi defines its scope in line with this understanding. However, it requires the papers falling in the borderline to have a significant component of civil engineering.