Performance of porous asphalt mixture with various additives
Performance of porous asphalt mixture with various additives
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DOI：
10.1080/10298436.2016.1175560
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发表时间：
2018-01-01
影响因子：
3.8
通讯作者：
Ni, An-Qi
中科院分区：
文献类型：
--
作者：
Ma, Xiang;Li, Qiang;Ni, An-Qi
本研究的目的是通过实验室测试评估提高多孔沥青耐久性和强度的方法。使用三种类型的粘合剂制备多孔沥青样本：高粘度粘合剂（HVB）、PG76-22 和 PG70-22。多孔沥青中使用了各种添加剂：纤维、熟石灰和 DBS 聚合物。进行了全面的实验室测试，包括强度测试、粘结剂沥水测试、坎塔布罗磨损测试、湿气敏感性测试、车辙测试、热应力抑制样品测试和渗透性测试。结果发现，HVB显着改善了多孔沥青的综合性能； DBS添加剂提高了其高温性能，但降低了低温抗裂性和耐久性；纤维增强了其低温下的耐久性和抗裂性能；熟石灰提高了其水分稳定性，同时削弱了其耐久性。结论：全多孔沥青应采用HVB和聚酯纤维； DBS添加剂适用于高温地区的多孔沥青，多雨地区的多孔沥青可添加熟石灰。
The objective of this study is to evaluate the approaches to improve the durability and strength of the porous asphalt through laboratory testing. Porous asphalt specimens were prepared using three types of binders: high-viscosity binder (HVB), PG76-22 and PG70-22. Various additives: fibre, hydrated lime and DBS polymer, were utilised in the porous asphalt. Comprehensive laboratory tests, including strength test, binder draindown test, Cantabro abrasion test, moisture susceptibility test, rutting test, thermal stress restrained sample test, and permeability test, were conducted. It is found that HVB significantly improved the overall performance of the porous asphalt; DBS additive improved its high-temperature performance, but lowered the cracking resistance at low temperature as well as the durability; fibre enhanced its durability and anti-cracking performance at low temperature; hydrated lime improved its moisture stability while weakening its durability. It is concluded that HVB and polyester fibre should be used in all porous asphalt; DBS additive is good for porous asphalt in high-temperature areas, and hydrated lime can be added to porous asphalt in rainy areas.