石头石青的性能评估涉及粗钢渣和精细RAP
Yan Wu1, Weidong Cao2, Chao Xu1
1Qilu Expressway Co., Ltd., Jinan 250100, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
使用钢渣和再生青路面 (RAP) 的石头青 (SMA) 提供了卓越的磨损和低温裂纹阻力. 这种具有成本效益的SR-SMA混合物为传统的玄武岩聚合物SMA提供了可持续的替代品,降低了35%的材料成本.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 可持续路面工程 可持续路面工程
背景情况:
- 石头青 (SMA) 是中国普遍存在的高速公路路面混合物.
- 随着成本的上升和高质量的玄武岩聚合物的稀缺,需要替代材料.
- 丰富的钢和再生青路面 (RAP) 提供了潜在的替代品.
研究的目的:
- 为了评估新型SMA混合物 (SR-SMA) 的路面性能,该混合物包含钢和RAP.
- 为了比较SR-SMA与传统的SMA (B-SMA) 和混合 (SB-SMA) 混合物的性能.
- 评估在SMA使用钢和RAP的成本效益和可持续性.
主要方法:
- 设计的SMA 13混合物使用粗钢渣聚合物和精细RAP (SR-SMA).
- 进行了比较性能的测试:车轮跟踪,低温光束曲,冷解间接拉力和四点曲疲劳测试.
- 评估了三种SMA变体:SR-SMA (钢和RAP),SB-SMA (钢和玄武岩) 和B-SMA (只有玄武岩).
主要成果:
- 与SB-SMA (4312) 和B-SMA (4135) 相比,SR-SMA表现出更高的路阻力 (4865次/毫米).
- SR-SMA 显示了增强的低温裂纹耐受性 (故障应变 3150 m),表现优于 B-SMA (2608 m),但略低于 SB-SMA (4436 m).
- 虽然SR-SMA的湿度稳定性比B-SMA和SB-SMA差,但符合中国的规格;所有变体的疲劳耐受性都相当.
结论:
- 使用钢渣和RAP的SR-SMA是传统玄武岩聚合物SMA的经济有效替代品,可降低约35%的材料成本.
- 该SR-SMA混合物表现出优异的防滑性和良好的低温破裂性能.
- SR-SMA为中国高速公路铺路施工提供了可行和可持续的解决方案,解决了聚合物稀缺问题并利用废物材料.
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