山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (3): 96-103.doi: 10.6040/j.issn.1672-3961.0.2022.165
曹卫东1,任宪富2,娄术荣2,张同国2,侯宗良1,张吉哲1
CAO Weidong1, REN Xianfu2, LOU Shurong2, ZHANG Tongguo2, HOU Zongliang1, ZHANG Jizhe1
摘要： 为提高水泥混凝土桥面防水层的性能,采用复合改性沥青、玻璃纤维、单粒径碎石等材料设计一种纤维增强型桥面防水层。通过正交试验设计、剪切试验与拉拔试验研究复合改性沥青类型、纤维用量、沥青喷涂量与碎石覆盖率对防水层剪切强度与拉拔强度的影响,确定本研究范围内的最优方案。结果表明,纤维增强型桥面防水层的最优方案是复合改性沥青(脱硫胶粉质量分数为18%、SBS质量分数为2%的复合改性70号沥青),纤维用量为0.15 kg/m2,沥青喷涂量为2.5 kg/m2,碎石覆盖率为80%;推荐方案的剪切强度、拉拔强度、抗施工损伤性能、抗渗性能均满足规范要求,且优于常用的SBS改性沥青碎石桥面防水层。
中图分类号:
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