| 摘要: |
| 研究了粉煤灰用量、早期养护温度对工程地质聚合物复合材料（EGC）拉伸性能及微观结构的影响，并从细观力学角度对其纤维-基体界面的力学性能进行了分析.结果表明：降低粉煤灰用量不利于EGC拉伸延性的提高，适当提高早期养护温度有利于EGC拉伸性能的提高；粉煤灰用量为80%、早期养护温度为60 ℃或80 ℃时，EGC的拉伸应变可达到3.5%以上；纤维拉拔过程中较长的滑移硬化阶段有助于EGC拉伸性能的提升. |
| 关键词: 地质聚合物 韧性 拉伸性能 单纤维拔出试验 界面性能 |
| DOI：10.3969/j.issn.1007-9629.2022.04.011 |
| 分类号:TU528.58 |
| 基金项目:国家自然科学基金资助项目（51878365） |
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| Influence of Fly Ash Content and Early Curing Temperature on Tensile Performance of EGC |
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WAN Xiaomei1,2, LIU Jie1, ZHU Yaguang1, YU Qi1,3, ZENG Yunhui1
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1.School of Civil Engineering， Qingdao University of Technology， Qingdao 266033， China;2.Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone， Qingdao University of Technology， Qingdao 266033， China;3.Qingdao Qingjian New Material Group Co.， Ltd.， Qingdao 266108， China
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| Abstract: |
| The effects of fly ash content and early curing temperature on the tensile properties and microstructure of engineering geopolymer composites （EGC） were studied. The mechanical properties of fiber-matrix interface of EGC were analyzed from the perspective micromechanics. The test results show that the decrease of fly ash content is not conductive to the improvement of the tensile ductility of EGC， and the moderate increase of early curing temperature is conducive to the improvement of tensile properties of EGC. When the fly ash content is 80%， and the early curing temperature is 60 ℃ or 80 ℃， the tensile strain of EGC can reach more than 3.5%. The longer slip hardening stage during fiber pullout process is helpful to improve the tensile performance of EGC. |
| Key words: geopolymer toughness tensile performance single fiber pull-out test interface property |
