| 引用本文: | 张锋,李梦琪,王天宇,冯德成.水泥混凝土桥面复合防水粘结层的性能[J].哈尔滨工业大学学报,2020,52(3):26.DOI:10.11918/201812050 |
| ZHANG Feng,LI Mengqi,WANG Tianyu,FENG Decheng.Performance of composite waterproof cohesive layer on cement concrete bridge[J].Journal of Harbin Institute of Technology,2020,52(3):26.DOI:10.11918/201812050 |
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| 摘要: |
| 为研究水泥混凝土桥面复合防水粘结层的剪切性能、粘结性能和低温性能,以北安—富裕高速公路建华大桥为工程依托,采用水泥混凝土、SBS改性沥青防水粘结层与沥青砂AC-5制备复合试件,进行层间直接剪切试验和拉拔试验；同时对沥青砂AC-5制备的小梁试件进行低温开裂及低温收缩试验. 结果表明:当防水粘结层用量为0.6 kg/m2时,层间抗剪强度最大,能够达到3.45 MPa；随着防水粘结层用量的增大,拉拔强度同样呈先增大后减小的趋势,当防水粘结层用量为0.8 kg/m2时,拉拔强度最高；沥青砂小梁试件梁底最大弯拉应变随温度的降低逐渐减小,而弯曲劲度模量却逐渐增大,且在-5~-10 ℃的温度区间内沥青混合料低温变形最剧烈. |
| 关键词: 道路工程 复合防水粘结层 水泥混凝土桥 直接剪切试验 低温性能 |
| DOI：10.11918/201812050 |
| 分类号:U416.2 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51578200) |
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| Performance of composite waterproof cohesive layer on cement concrete bridge |
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ZHANG Feng1,LI Mengqi1,2,WANG Tianyu1,3,FENG Decheng1
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(1. School ofTransportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; 2. Liaoning Provincial Transportation Planning and Design Institute Co., Ltd., Shenyang 110166, China; 3. China State Construction International Investments (China) Ltd., Shenzhen 518971, Guangdong, China)
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| Abstract: |
| To investigate the shear performance, bonding performance, and low temperature performance of the composite waterproof cohesive layer of cement concrete bridge deck, the Jianhua Bridge on Beian-Fuyu highway was taken as the research object. Composite specimens were prepared using cement concrete, SBS modified asphalt waterproof cohesive layer, and AC-5 asphalt sand, and the amount of waterproof cohesive layer was taken as a variable to carry out direct shear and pull-out tests. Meanwhile, asphalt sand AC-5 beam specimens were prepared to conduct low temperature cracking and low temperature shrinkage tests. Results show that when the amount of waterproof cohesive layer was 0.6 kg/m2, the interlayer shear strength was the best, reached 3.45 MPa. With the increase of the amount of waterproof cohesive layer, the pull-out strength first increased and then decreased. When the amount of waterproof cohesive layer was 0.8 kg/m2, the pull-out strength was the highest. The maximum bending strain at the bottom of asphalt sand beams decreased with the decrease of temperature, while the flexural stiffness modulus was gradually increased, and the bituminous mixture had the severest deformation in the temperature range of -5--10 ℃. |
| Key words: highway engineering composite waterproof cohesive layer cement concrete bridge direct shear test low temperature performance |
