试样特性、纤维和混合成分对交通隔音墙橡胶混凝土声学性能的影响

IF 3.4 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Materials and Structures Pub Date : 2024-09-25 DOI:10.1617/s11527-024-02459-y
Roshan Jayathilakage, Ailar Hajimoahammadi, Hamid Vali Pour, Danielle Moreau, Stephen Foster
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引用次数: 0

摘要

回收利用报废轮胎(EOLT)是解决许多国家主要废物问题的可持续解决方案。本研究重点关注报废轮胎作为建筑材料的再利用,特别是以报废轮胎为基础的橡胶混凝土。然而,一些研究空白阻碍了人们对这种建筑材料的理解,从而无法将其付诸实践。本研究深入探讨了关键参数,包括外加剂成分、龄期、厚度、橡胶分布和表面粗糙度,这些参数在设计和实施橡胶混凝土隔音屏障中起着关键作用。论文介绍了纤维增强橡胶混凝土在掺入空气后的性能研究结果,阐明了弯曲韧性和裂缝后行为。此外,还研究了掺入粉煤灰和磨细高炉矿渣(GGBFS)作为水泥替代品的效果。还研究了纤维增强橡胶混凝土的声学性能,包括样品调节(表面饱和干燥或干燥)的影响。结果表明,引气外加剂、用轮胎橡胶碎片替代粗砂以及加入回收的聚丙烯纤维都能显著提高混凝土的机械和声学性能。例如,抗压强度提高了 43%,抗折强度提高了 120%,隔音性能提高了近两倍,而吸水性和可渗透空隙体积则相对不受影响。这项研究提出了一种优化的可持续混合设计,用橡胶替代 75% 以上的骨料。它强调了以 EOLT 为基础的橡胶混凝土作为一种对环境负责的建筑材料的潜力,可在多个领域提供更高的性能,包括隔音屏障。
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Effects of specimen characteristics, fibre and mix constituents on the acoustic performance of rubberised concrete for traffic noise walls

Recycling end-of-life tires (EOLT) presents a sustainable solution for addressing a major waste issue in many countries. This study focuses on the reuse of EOLT as construction materials, particularly in the form of EOLT-based rubberised concrete. However, several research gaps hinder the understanding of this construction material for implementation into practice. This study delves into key parameters, including admixture composition, aging, thickness, rubber distribution, and surface roughness, which play pivotal roles in designing and implementing rubberised concrete noise barriers. The paper presents the results of investigations into the performance of fibre-reinforced rubberised concrete when entrained with air, shedding light on flexural toughness and post-crack behaviour. The effects of incorporating fly ash and ground granulated blast furnace slag (GGBFS) as cement replacements are also examined. The acoustic performance of fibre-reinforced rubber concrete is studied, including the impact of sample conditioning (surface saturated dry or dry). The results indicate that air-entraining admixtures, the replacement of coarse sand with tire-derived rubber shreds, and the inclusion of recycled polypropylene fibre significantly enhance the mechanical and acoustic properties of the concrete. For instance, compressive strength improves by 43%, flexural strength by 120% and acoustic performance nearly twice, while water absorption and volume of permeable voids remain relatively unaffected. This study suggests an optimized sustainable mix design with rubber replacing more than 75% of the aggregate volume. It underscores the potential of EOLT-based rubberised concrete as an environmentally responsible construction material, offering enhanced performance across multiple domains, including noise attenuation barriers.

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来源期刊
Materials and Structures
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.
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