Evaluation of skid resistance of pervious concrete slabs under various winter conditions for driver and pedestrian users
Evaluation of skid resistance of pervious concrete slabs under various winter conditions for driver and pedestrian users
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DOI：
10.1080/14680629.2019.1688175
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发表时间：
2019-11-14
影响因子：
3.7
通讯作者：
Haselbach, Liv
中科院分区：
文献类型：
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作者：
Rodin, Harry, III;Nassiri, Somayeh;Haselbach, Liv
对透水混凝土（PC）与传统硅酸盐水泥混凝土（PCC）的抗滑性能进行了室内和现场对比研究。使用英国钟摆测试仪（BPT）测试干燥，潮湿和结冰的PC表面，该仪器带有两个橡胶滑块，代表驾驶员和行人用户。此外，结冰的PC表面使用除冰和防冰化学品进行处理，然后使用BPT进行测试。防滑阻力值记录为英国钟摆数（BPN）。从三种压实水平的混合设计中铸出的PC板表明PC孔隙率与BPN之间存在最小的相关性。在干燥、潮湿和结冰的表面条件下，实验室浇铸的PC板的BPN值分别比PCC板高23%、27%和97%。在一次结冰事件后，在PC板上一次性应用抗冰剂和除冰剂，使用MgCl2和CaCl2将其摩擦提高到允许的BPN水平。在不同混合设计和地面条件下的五个PC装置的现场测试显示，与相邻的PCC板相比，BPN相似或略高。总体而言，本研究的实验室测试表明，与传统混凝土相比，PC具有明显更高的抗滑性是可能的，现场测试揭示了定期维护、骨料类型和配合比设计对透水混凝土抗滑性的重要性。
Skid resistance of pervious concrete (PC) in comparison with traditional portland cement concrete (PCC) was investigated in the laboratory and in the field. Dry, wet, and iced PC surfaces were tested using the British Pendulum Tester (BPT) with two rubber sliders to represent driver and pedestrian users. Also, iced PC surfaces were treated with de- and anti-icing chemicals and then tested using BPT. Skid resistance values were recorded as the British Pendulum Number (BPN). PC slabs cast from one mix design in three compaction levels revealed that minimal correlation existed between PC porosity and BPN. Laboratory-cast PC slabs showed 23%, 27% and 97% higher BPN values relative to PCC slabs under dry, wet and icy surface conditions, respectively. After one icing event, the one-time application of anti- and de-icing agents on PC slabs improved their friction to the allowable BPN level using both MgCl2 and CaCl2. Field testing of five PC installations with various mix designs and surface conditions showed similar or slightly higher BPN than adjacent PCC slabs. Overall, the laboratory testing in this study showed it is possible to produce PC with significantly higher skid resistance relative to traditional concrete, the field testing revealed the importance of regular maintenance, aggregate type and mixture design on the skid resistance of pervious concrete.