| 含沥青路面再生骨料的自密实混凝土损伤本构关系 |
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| 引用本文： | 刘赫,段广超,张景怡,杨彦海,张怀志.含沥青路面再生骨料的自密实混凝土损伤本构关系[J].硅酸盐通报,2022,41(2):469-478. |
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| 作者姓名： | 刘赫 段广超 张景怡 杨彦海 张怀志 |
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| 作者单位： | 1.沈阳建筑大学交通工程学院,沈阳 110168;2.沈阳城市建设学院土木工程系,沈阳 110167 |
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| 基金项目： | 辽宁省博士启动项目(2021-BS-166)； |
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| 摘 要： | 为了研究沥青路面再生骨料(RAP)掺量对RAP自密实混凝土(SCC)力学性能的影响,采用单轴压缩方法研究RAP掺量为0%、30%、60%、90%和100%(质量分数)的自密实混凝土的应力-应变关系和韧性指数。基于应变等价假说和统计损伤理论建立单轴压缩本构关系模型,探讨了RAP掺量与损伤变量和损伤速率之间的关系。结果表明,随着RAP掺量的增加,试件峰值应力和弹性模量下降,峰值应变和韧性指数增加,所建立的损伤本构关系可以较好地描述不同RAP掺量下自密实混凝土的应力-应变关系。在应变小于0.002时,掺入RAP的自密实混凝土损伤变量值大于基准自密实混凝土,且随着RAP掺量的增大其损伤值越大;当应变大于0.002时,掺入RAP自密实混凝土的损伤变量值低于基准自密实混凝土,且随RAP掺量增大不断减小。随着RAP掺量增大,RAP自密实混凝土损伤速率不断下降,且损伤速率呈先增大后减小的趋势。
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| 关 键 词： | 沥青路面再生骨料 自密实混凝土 应力-应变 本构关系 损伤变量 扫描电镜 |
| 收稿时间： | 2021-10-25 |
Damage Constitutive Relationship of Self-Compacting Concrete with Reclaimed Asphalt Pavement |
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| LIU He,DUAN Guangchao,ZHANG Jingyi,YANG Yanhai,ZHANG Huaizhi.Damage Constitutive Relationship of Self-Compacting Concrete with Reclaimed Asphalt Pavement[J].Bulletin of the Chinese Ceramic Society,2022,41(2):469-478. |
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| Authors: | LIU He DUAN Guangchao ZHANG Jingyi YANG Yanhai ZHANG Huaizhi |
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| Affiliation: | 1. School of Transportation Engineering, Shenyang Jianzhu University, Shenyang 110168, China;2. Department of Civil Engineering, Shenyang Urban Construction University, Shenyang 110167, China |
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| Abstract: | In order to study the effect of reclaimed asphalt pavement(RAP)content on the mechanical properties of self-compacting concrete(SCC),SCC samples with RAP content of 0%,30%,60%,90%,and 100%by weight replacement were prepared.Stress-strain relationship and toughness index of samples were studied by uniaxial compression test.The uniaxial compression damage constitutive model based on the strain equivalence hypothesis and statistical damage theory was established.Damage variable and damage variable development rate of samples with different RAP content were studied.The results show that compared with SCC,with the increase of RAP content,the peak stress and elastic modulus decrease and the peak strain and toughness index increase.The constitutive damage model describes the stress-strain relationship of SCC with different RAP content effectively.When the strain is less than 0.002,the damage variable value of SCC samples with RAP is larger than control SCC sample and the damage variable value of samples increases with the increase of RAP content.When the strain is larger than 0.002,the damage variable value of SCC samples with RAP is less than control SCC sample,and decreases with the increase of RAP content.With the increase of RAP content,the damage variable development rate of RAP self-compacting concrete decreases continuously and the damage rate shows a trend of increase first and then decrease. |
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| Keywords: | reclaimed asphalt pavement self-compacting concrete stress-strain constitutive relationship damage variable scanning electron microscope |
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