Investigating the influence of acid-base/KH550 composite surface modified BF on the properties of fiber-reinforced SBS-modified asphalt mastic

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2024-09-11 DOI:10.1016/j.conbuildmat.2024.138290

Shaowei Ni , Wenbo Luo , Zhichao Wang

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引用次数: 0

Abstract

The surface properties of fibers significantly influence fiber-reinforced asphalt mastic (FRAM) performance. However, the impact of composite-modified basalt fiber (BF) on basalt fiber-reinforced asphalt mastic (BFRAM) remains unclear. This study examines the effects of acid-base/KH550 modified BFs on BFRAM performance, providing an experimental basis for further optimization. Tests included SEM and fiber leakage for BFs and separation, physical properties, DSR, and DMA for BFRAMs. The research indicates that (1) Composite modification enhances the fiber’s surface roughness, activity, oil-holding properties, and compatibility with SBS-modified asphalt. (2) Due to differences in acid-base etching, acid etching combined with KH550 promotes a more uniform and extensive coupling reaction with the BFs. In contrast, alkali etching with KH550 facilitates a deeper, localized reaction. (3) Composite modification of the BFs significantly improves the high-temperature rheological properties of the BFRAMs, with acid-base etching making the grafting reaction between the fiber and coupling agent more pronounced. At a test temperature of 82°C, the rutting factor of BFRAMs containing composite-modified (acid-etched + KH550) BFs is 2.7 times that of asphalt mastic without BFs. (4) The glass transition temperature of BFRAMs modified by acid etching and KH550 is 4.9°C lower than that of the original asphalt mastic, proving that composite-modified BFs enhance the low-temperature elastic deformation capacity of the BFRAMs.

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研究酸碱/KH550 复合表面改性 BF 对纤维增强型 SBS 改性沥青胶泥性能的影响

纤维的表面特性对纤维增强沥青胶泥（FRAM）的性能有很大影响。然而，复合改性玄武岩纤维（BF）对玄武岩纤维增强沥青胶泥（BFRAM）的影响仍不清楚。本研究探讨了酸碱/KH550 改性玄武岩纤维对 BFRAM 性能的影响，为进一步优化提供了实验基础。测试包括 BF 的扫描电镜和纤维泄漏，以及 BFRAM 的分离、物理性能、DSR 和 DMA。研究表明：（1）复合改性增强了纤维的表面粗糙度、活性、持油性以及与 SBS 改性沥青的相容性。(2）由于酸碱蚀刻的不同，与 KH550 结合的酸蚀刻能促进与 BFs 发生更均匀、更广泛的偶联反应。相比之下，与 KH550 一起进行的碱浸蚀则能促进更深层次的局部反应。(3) BF 的复合改性显著改善了 BFRAM 的高温流变特性，酸碱蚀刻使纤维与偶联剂之间的接枝反应更加明显。在 82°C 的试验温度下，含有复合改性（酸蚀 + KH550）BF 的 BFRAM 的车辙系数是不含 BF 的沥青胶泥的 2.7 倍。(4）经酸蚀和 KH550 改性的 BFRAM 的玻璃化温度比原沥青胶泥低 4.9°C，证明复合改性 BF 增强了 BFRAM 的低温弹性变形能力。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.