机场混凝土道面封缝材料疲劳特性

刘晓曦; 王硕太

机场混凝土道面封缝材料疲劳特性

空军工程大学工程学院, 陕西西安 710038

基金项目:

军队科研项目 KH0017001

详细信息

作者简介:
刘晓曦(1979-), 男, 湖南株洲人, 空军工程大学工学博士研究生, 从事机场建筑施工与材料研究

中图分类号: U414
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- 被引次数: 0
出版历程
- 收稿日期: 2005-07-12
- 刊出日期: 2006-03-25

Joint Sealant Fatigue Property of Airport Concrete Pavement

School of Engineering, Air Force Engineering University, Xi'an 710038, Shaanxi, China

More Information

Author Bio:
LIU Xiao-xi(1979-), male, doctoral student, 86-29-83687705, liuxiaoxilxx@sina.com

摘要

摘要: 为了提高机场道面的防水密封效果, 对道面封缝材料的受力性能进行了疲劳特性试验, 分别考虑了接缝宽度、拉伸压缩和冻融对封缝材料疲劳特性的影响。在试验中封缝材料同时受到拉伸(压缩) 和剪切的作用, 并模拟了材料在胀缝和横向缩缝中的受力情况。经50次冻融循环处理后的材料较未经处理的材料破坏加载次数小, 应力状态均有较大降低, 最大值达78%, 聚硫密封胶相对于聚氨酯密封胶有较好的疲劳性能, 在温差较大的机场建议采用聚硫密封胶。
- 机场工程 /
- 封缝材料 /
- 疲劳特性 /
- 混凝土道面 /
- 接缝
Abstract: In order to improve the waterproof performance of airport pavement by fatigue loading method, the property of joint sealant was evaluated, the effects of joint width, tension and compression, freezing and thawing on the fatigue property of joint sealant were considered.In the test, the sealant was suffered from normal stress and shear stress at the same time, the material stress status in expansion joint and transverse contract joint was simulated.Some specimens were exposed to 50 cycles of rapid freezing and thawing prior to testing, which reduced the number of loading cycles that caused sealant failure, and experienced a high rate of stress reduction.The fatigue behaviors of the polysulfide are better than the polyurethane, so polysulfide should be used in freezing airport, the conclusion shows a good agreement with survey result.
- airport engineering /
- sealant /
- fatigue property /
- concrete pavement /
- joint

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图 1 接缝水平位移

Figure 1. Joint Horizontal Displacement

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图 2 机轮的剪切作用

Figure 2. Shearing Action of Tire Load

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图 3 封缝材料变形

Figure 3. Sealant Deformation with Shear Loading

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图 4 试验夹具

Figure 4. Fixture Design

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图 5 密封胶A的受力性能

Figure 5. Performance of Sealant A

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图 6 密封胶B的受力性能

Figure 6. Performance of Sealant B

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表 1 试验结果

Table 1. Tested Result

材料类型	试验类型	接缝宽度/mm	破坏类型	加载次数	破坏时拉压应力/kPa	破坏时剪应力/kPa
A	压缩	20	粘结(粘结)	15 (10)	193 (183)	64 (61)
	压缩	8	无(无)	500 (500)	248 (73)	83 (24)
	拉伸	20	粘结(粘结)	8 (8)	183 (138)	61 (46)
	拉伸	8	无(无)	500 (500)	166 (62)	55 (21)
B	压缩	20	无(无)	500 (500)	193 (193)	64 (64)
	压缩	8	无(无)	500 (500)	345 (90)	115 (30)
	拉伸	20	无(粘结)	500 (76)	221 (186)	74 (62)
	拉伸	8	无(无)	500 (500)	395 (83)	140 (28)
注: 封缝材料试件没有出现破坏, 试验加载500次后停止; 括号内数值为经冻融处理后的封缝材料试验结果。

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参考文献(9)

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