Mix design of large-stone asphalt mixtures for heavy-traffic roads

IF 0.6 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES
Z. G. Mascarenhas, Igor Amorim Beja, K. Vasconcelos, L. Bernucci
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引用次数: 0

Abstract

Heavy traffic and high temperatures are a common cause of rutting in paved areas, which reduces the time needed between pavement maintenance interventions. Large-stone asphalt mixtures (LSAMs) can reduce rutting when used as intermediate layers in pavement rehabilitation. LSAM is asphalt concrete with a nominal maximum aggregate size of at least 25 mm. In this study, we provide a brief literature review of the historical use of LSAMs, as well as the relevant characteristics of LSAM design. Three LSAMs were designed using different compaction methods: (i) Marshall compaction; (ii) rolling compaction; and (iii) Superpave gyratory compaction (SGC) by varying the compaction energy in 75, 100, and 125 gyrations. Depending on the mix design method used, the designed asphalt content ranged from 3.0 to 4.3%. The locking point from the SGC was evaluated at different gyratory compaction energies, which were related to the porosity of the dominant aggregate size range. These parameters are considered to be of great value when evaluating the LSAM design.
重交通道路用大石料沥青混合料配合比设计
繁忙的交通和高温是铺砌区域车辙的常见原因,这减少了路面维护干预之间所需的时间。大石料沥青混合料作为路面修复的中间层,可以减少车辙。LSAM是标称最大骨料尺寸至少为25毫米的沥青混凝土。在本研究中,我们对LSAM的历史使用以及LSAM设计的相关特征进行了简要的文献回顾。采用不同的压实方法设计了三种lsam:(i)马歇尔压实;(ii)碾压实;在75、100和125个旋转中改变压实能量的Superpave旋转压实(SGC)。根据所采用的配合比设计方法,设计沥青含量在3.0 ~ 4.3%之间。在不同的旋转压实能量下,SGC的锁紧点与主要粒径范围内的孔隙率有关。在评估LSAM设计时,这些参数被认为是非常有价值的。
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
Acta Scientiarum-technology
Acta Scientiarum-technology 综合性期刊-综合性期刊
CiteScore
1.40
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: The journal publishes original articles in all areas of Technology, including: Engineerings, Physics, Chemistry, Mathematics, Statistics, Geosciences and Computation Sciences. To establish the public inscription of knowledge and its preservation; To publish results of research comprising ideas and new scientific suggestions; To publicize worldwide information and knowledge produced by the scientific community; To speech the process of scientific communication in Technology.
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