Study on preparation and properties of sepiolite/SBR composite modified emulsified asphalt

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2025-04-15 DOI:10.1617/s11527-025-02628-7

Gang Huang, Yaru Lv, Tianhao Qi, Junbo Zhou, Chao Zhou, Xia Zhang, Xin Tian, Tingting Kang, Tingjun Du

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引用次数: 0

Abstract

Sepiolite is a magnesium-rich silicate clay mineral characterized by a large specific surface area and numerous nanoscale channels, which make it a promising candidate for high-tech applications such as nanofiber reinforcement and catalysis. However, its utilization in road materials remains limited. This study investigated the application of natural sepiolite purified through acid treatment to enhance the performance of emulsified asphalt. Microscopic analyses, including Fourier transform infrared spectroscopy and laser particle sizing, confirmed that the acid treatment increased the specific surface area of the sepiolite fibers and refined their structure. Sepiolite fibers and styrene-butadiene rubber (SBR) were employed as modifiers to prepare a sepiolite/SBR composite-modified emulsified asphalt, optimized using a unified design approach. Performance tests demonstrated that the composite improved both high- and low-temperature performance, as well as the storage stability of conventional emulsified asphalt, resulting in a 30.7% increase in softening point, a 109% increase in energy of rupture, and a 62.9% decrease in 5-day storage stability. Fluorescence microscopy revealed that the compatibility between sepiolite and asphalt improved with the addition of SBR. Dynamic shear rheology confirmed the enhancement of high-temperature stability and resistance to deformation. The research findings provide a valuable reference for the application of sepiolite in road materials.

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海泡石/SBR复合改性乳化沥青的制备及性能研究

海泡石是一种富含镁的硅酸盐粘土矿物，具有较大的比表面积和许多纳米级通道，这使其成为纳米纤维增强和催化等高科技应用的有前途的候选者。然而，它在道路材料中的应用仍然有限。本研究探讨了经酸处理纯化的天然海泡石在乳化沥青中提高性能的应用。显微分析，包括傅里叶变换红外光谱和激光粒度分析，证实了酸处理增加了海泡石纤维的比表面积，并改善了它们的结构。以海泡石纤维和丁苯橡胶（SBR）为改性剂，采用统一设计方法进行优化，制备了海泡石/丁苯橡胶复合改性乳化沥青。性能试验表明，复合材料提高了常规乳化沥青的高低温性能和储存稳定性，软化点提高了30.7%，破裂能提高了109%，5天储存稳定性降低了62.9%。荧光显微镜观察发现，SBR的加入改善了海泡石与沥青的相容性。动态剪切流变学证实了高温稳定性和抗变形能力的增强。研究结果为海泡石在道路材料中的应用提供了有价值的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.