Thermal, chemical, and rheological characterization of bio-asphalt prepared using sugarcane molasses

IF 3.9 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Materials and Structures Pub Date : 2025-01-10 DOI:10.1617/s11527-024-02549-x

Dheeraj Mehta, Nikhil Saboo

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Abstract

Asphalt binder replacement with bio-materials (bio-asphalt) has recently gained significant attention. Bio-asphalt serves as a sustainable avenue and is currently being researched for reducing the dependency on asphalt binder. This work is aimed towards understanding the thermal, morphological, chemical, and rheological behaviour of asphalt binder partially replaced with sugarcane molasses (SM). The optimum dosage for partial replacement was arrived as 30% (by weight of asphalt binder). Two base binders (VG 40 and VG 30) along with five SM sources were used to prepare the bio-asphalts. The thermal stability evaluated using thermogravimetric analysis revealed that bio-asphalts have acceptable thermal resistance withstanding temperature up to 200 °C. Fluorescence microscopy exhibited that SM particles were uniformly dispersed in the base binder, rendering a stable structure. Through chemical analysis (asphaltene–maltene ratio) it was found that the asphaltene percentage marginally increases after the addition of SM. Rheological characterization comprised of multiple stress creep recovery and linear amplitude sweep tests. Test results indicated that incorporation of SM resulted in lower non-recoverable creep compliance (J_nr), decreased permanent strain, and similar/slightly higher percent recovery (% R). The fatigue life of bio-asphalts improved due to the formulation of compounds capable of imparting elasticity to the bio-asphalts.

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用甘蔗糖蜜制备的生物沥青的热、化学和流变特性

用生物材料（生物沥青）替代沥青粘结剂是近年来备受关注的问题。生物沥青是一种可持续发展的途径，目前正在研究如何减少对沥青粘合剂的依赖。这项工作旨在了解部分用甘蔗糖蜜（SM）代替的沥青粘合剂的热、形态、化学和流变行为。部分置换的最佳用量为30%（按沥青粘结剂重量计）。两种基础粘合剂（VG 40和VG 30）以及5种SM源用于制备生物沥青。热稳定性评价使用热重分析表明，生物沥青具有可接受的耐热性，可承受温度高达200°C。荧光显微镜显示，SM颗粒均匀分散在基粘合剂中，呈现稳定的结构。通过化学分析（沥青质-麦芽素比）发现，添加SM后沥青质百分比略有增加。流变特性包括多重应力蠕变恢复和线性振幅扫描试验。试验结果表明，SM的掺入导致不可恢复蠕变柔度（Jnr）降低，永久应变降低，回复率（% R）相似或略高。由于能够赋予生物沥青弹性的化合物的配方，生物沥青的疲劳寿命得到了提高。

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来源期刊

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.