Fragmentation behavior of single size range of basalt aggregate under dynamic crushing test and its application in porous asphalt mixture
Fragmentation behavior of single size range of basalt aggregate under dynamic crushing test and its application in porous asphalt mixture
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DOI：
10.1016/j.conbuildmat.2022.129556
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发表时间：
2022-12
影响因子：
7.4
通讯作者：
Jun Cai;Weitao Ma;Hongwei Yuan;Huanan Yu;Jiu-peng Zhang;Zongwu Chen
中科院分区：
文献类型：
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作者：
Jun Cai;Weitao Ma;Hongwei Yuan;Huanan Yu;Jiu-peng Zhang;Zongwu Chen
排水性沥青路面具有排水快、行车噪声小等优点。但其力学性能较差，限制了其进一步的应用。我们的前期研究表明，由单一粒径范围的石灰石骨料在动态破碎试验（DCT）形成的系统具有良好的力学性能，并可能具有多孔级配的特点。本文试图进一步验证DCT作用下玄武岩集料单粒径范围（SSRBA）形成体系的分布特征及相应混合料的整体性能。首先研究了SSRBA在DCT作用下的破碎行为，然后研究了形成体系的范围和分布特征，最后研究了基于形成体系和最佳粘结剂含量的混合料性能。结果表明，不同来源和不同生产工艺的SSRBA在DCTs中表现出相似的碎裂行为（碎裂行为的客观特征），形成的体系在各粒径的分布细节主要受所选粒径范围内的一次分布比的影响。掺合料的抗压强度、抗剪强度、高温稳定性、渗透性和抗滑性较好，但磨耗量、低温开裂和湿敏性较差。这些研究结果将为基于DCT的成形系统优化设计方法提供依据。
Porous asphalt pavement (PAP) has the advantage of quickly draining pavement water and greatly decreasing driving noise. However, its relatively poor mechanical properties restrict further application. Our previous study revealed the formed system from single size range of limestone aggregate in the dynamic crushing test (DCT) had good mechanical properties and possibly possessed the characteristics of porous gradation. This paper tried to further verify the distribution characteristics of formed system from single size range of basalt aggregate (SSRBA) under DCT and the overall performance of the corresponding mixture. Specifically, the fragmentation behavior of SSRBA under DCT was firstly investigated, and then the scope and distribution characteristics of formed systems was studied; finally, the performance of blended mixture based on the formed system and optimum binder content was studied. Results showed SSRBAs from different sources and production processes exhibited similar fragmentation behavior (objective characteristics of fragmentation behavior) in DCTs, and the distribution details of the formed systems at each size mainly affected by the primary distribution ratio in the selected size range. The blended mixture had edges in compression strength, shearing resistance, high temperature stability, permeability and skid resistance, while showed worse performance in abrasion loss, low temperature cracking, and moisture susceptibility. These findings will provide the basis for the optimal design method of formed system based on DCT.