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学者姓名：焦峪波
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Abstract ：
本发明公开了一种基于声发射特征参数聚类分析的UHPC拉剪裂纹判别方法，首先利用声发射同步监测UHPC损伤断裂过程，得到声发射特征参数，根据特征参数计算出RA值和AF值构建无标记数据集。其次，利用高斯混合模型聚类算法计算每一个样本点由不同簇生成的概率，多次迭代得到更新簇的概率直至高斯收敛，将每个样本划分到概率最大的簇中，得到两个聚类簇，并标记样本点数据；将标记后的样本数据集以RA值为x轴，AF值为y轴的形式展现，利用支持向量机算法，求得分割两个聚类簇的最佳线性分界线，通过该线性分界线划分拉伸和剪切裂纹。本发明所提方法原理明晰，过程简单易行、相比现有拉剪裂纹分类技术更具有客观性与普适性。
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| GB/T 7714 | 焦峪波 , 房梦寒 . 一种基于声发射特征参数聚类分析的UHPC拉剪裂纹判别方法 : CN202310645872.2[P]. | 2023-06-02 . |
| MLA | 焦峪波 等. "一种基于声发射特征参数聚类分析的UHPC拉剪裂纹判别方法" : CN202310645872.2. | 2023-06-02 . |
| APA | 焦峪波 , 房梦寒 . 一种基于声发射特征参数聚类分析的UHPC拉剪裂纹判别方法 : CN202310645872.2. | 2023-06-02 . |
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Abstract ：
本发明公开了一种金刚砂混合机制砂C160UHPMC及其制备方法，其UHPMC配合比设计与组成成份包括：水泥：850kg/m3；硅灰195.5kg/m3；水167.28kg/m3；金刚砂467.5kg/m3；机制砂467.5kg/m3；石英粉331.5kg/m3；钢纤维148.75kg/m3；减水剂60kg/m3；消泡剂1.5kg/m3。利用来源广泛、价格低廉、经济环保、可就地取材的机制砂取代了价格昂贵、污染环境的石英砂，解决石英砂作为骨料在生产过程中污染严重、价格偏高、质量难以把控等问题，减少了天然材料的消耗，减少了碳排放；回收喷磨等领域产生的废料金刚砂二次利用，掺入到机制砂为骨料的机制砂超高性能混凝土中，改善了纯机制砂UHPC力学性能不足和工作性能不佳等缺点；通过改变骨料类型制备了一种经济环保、性能优越、价格低廉的绿色超高性能混凝土。
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| GB/T 7714 | 焦峪波 , 熊正 . 一种金刚砂混合机制砂C160UHPMC及其制备方法 : CN202211669878.5[P]. | 2022-12-25 . |
| MLA | 焦峪波 等. "一种金刚砂混合机制砂C160UHPMC及其制备方法" : CN202211669878.5. | 2022-12-25 . |
| APA | 焦峪波 , 熊正 . 一种金刚砂混合机制砂C160UHPMC及其制备方法 : CN202211669878.5. | 2022-12-25 . |
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Abstract ：
In order to study the reversibility between aging and rejuvenation of modified asphalt binder, a kind of virgin asphalt was selected, and then three kinds of modified asphalt were prepared based on this virgin asphalt. The short-term and long-term aging tests were carried out for the four asphalts. Then three kinds of rejuvenation tests were carried out for the aged asphalt, including commercial rejuvenator, aromatic oil and warm mix rejuvenator. Dynamic shear rheometer (DSR) was used to carry out frequency scanning tests at different temperatures. According to the principle of time temperature equivalence, the master curves of different modified asphalts were constructed, and the rheological properties of asphalt during aging and rejuvenation were studied. By comparing the parameters including complex modulus and hardening index, the rejuvenation effects of viscoelastic properties of modified asphalt were evaluated. Based on the complex modulus of virgin asphalt and modified asphalt, the aging rejuvenation reversible index RM of modified asphalt is proposed to evaluate the recovery of rheological properties of asphalt by different rejuvenators. The results show that the modulus of three kinds of modified asphalt will increase with the deepening of aging. Warm mix rejuvenator can reduce the complex modulus of virgin asphalt, SBS modified asphalt and rubber powder modified asphalt most significantly, followed by the rejuvenator, and the aromatics oil reduced least obviously. This applied to both short-term aging and long-term aging. This research provides a better understanding on the effectiveness and limitation of current rejuvenation techniques and rejuvenators on common asphalts, which is good for the further improvement on production and techniques. (C) 2021 Elsevier Ltd. All rights reserved.
Keyword ：
Modifier Modifier Aging Aging Asphalt binder Asphalt binder Hardening index Hardening index Rheology Rheology Rejuvenation Rejuvenation Complex modulus Complex modulus
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| GB/T 7714 | Guo, Meng , Liu, Xu , Jiao, Yubo et al. Rheological characterization of reversibility between aging and rejuvenation of common modified asphalt binders [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2021 , 301 . |
| MLA | Guo, Meng et al. "Rheological characterization of reversibility between aging and rejuvenation of common modified asphalt binders" . | CONSTRUCTION AND BUILDING MATERIALS 301 (2021) . |
| APA | Guo, Meng , Liu, Xu , Jiao, Yubo , Tan, Yiqiu , Luo, Daisong . Rheological characterization of reversibility between aging and rejuvenation of common modified asphalt binders . | CONSTRUCTION AND BUILDING MATERIALS , 2021 , 301 . |
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Abstract ：
Different aggregate gradations of asphalt concrete possess dissimilar skeleton structures, leading to diverse macroscopic and mechanical characteristics. Acoustic emission (AE) technology can realize real-time monitoring of the whole damage evolution process of materials. The objective of the present investigation was to demonstrate the fracture characteristics of asphalt concrete with three types of aggregate gradations, including dense-graded asphalt concrete (AC), stone mastic asphalt (SMA), and open-graded friction course (OGFC) under indirect tensile load on account of the acoustic emission (AE) technique. The Marshall compaction method was used to prepare specimens, and the indirect tensile test (IDT) and AE monitoring were conducted simultaneously at different temperatures. The corresponding AE parameters containing energy, cumulative energy, count, and cumulative count were adopted to characterize the fracture process of asphalt concrete with different aggregate gradations. The impact of temperature on the damage characteristics of asphalt concrete was also assessed. Test results indicated that the AE parameters could effectively classify the damage stages of asphalt concrete, and specimens with different aggregate gradations exhibited different AE characteristics during failure processes. The combination of AE parameters and cumulative AE parameters can accurately characterize the damage characteristics of asphalt concrete. SMA specimens possessed the best overall performance among these three types of asphalt concrete in terms of the variations in energy and cumulative energy at different temperatures. The findings obtained in this study can provide a practical AE-based evaluation approach for demonstrating the fracture mechanism of asphalt concrete with different aggregate gradations.
Keyword ：
fracture behavior fracture behavior temperature effect temperature effect acoustic emission acoustic emission aggregate gradation aggregate gradation asphalt concrete asphalt concrete
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| GB/T 7714 | Fu, Liuxu , Jiao, Yubo , Chen, Xianhua et al. Evaluation Approach of Fracture Behavior for Asphalt Concrete with Different Aggregate Gradations and Testing Temperatures Using Acoustic Emission Monitoring [J]. | MATERIALS , 2021 , 14 (16) . |
| MLA | Fu, Liuxu et al. "Evaluation Approach of Fracture Behavior for Asphalt Concrete with Different Aggregate Gradations and Testing Temperatures Using Acoustic Emission Monitoring" . | MATERIALS 14 . 16 (2021) . |
| APA | Fu, Liuxu , Jiao, Yubo , Chen, Xianhua , Zhang, Mengsu . Evaluation Approach of Fracture Behavior for Asphalt Concrete with Different Aggregate Gradations and Testing Temperatures Using Acoustic Emission Monitoring . | MATERIALS , 2021 , 14 (16) . |
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Abstract ：
This paper investigates the efficiency of acoustic emission (AE) technique for monitoring and assessing the bond slip behavior and damage characteristics of deformed rebar embedded in hybrid fiber reinforced engineered cementitious composites (ECC). A series of pull-out tests were conducted on 48 prism samples with variable rebar diameters (14 mm, 20 mm, and 25 mm), embedded length (3d, 4d and 5d), and cover thickness (2.5d, 4d, 5d and 6d). Two AE sensors, attached on ECC surface and rebar surface respectively, were utilized to critically monitor the AE activity emitted from the ECC matrix and the interface between ECC and rebar throughout the tests. The bond-slip behavior of ECC-rebar presented a more ductile performance than conventional concrete (CC)-rebar because of fiber bridging effect. The damage classification and damage characteristics were clarified by measuring AE activity. The debonding process of ECC-rebar could be divided into four main stages based on the slope changes of cumulative AE hits, and further refined into several substages based on the sudden rises of AE energy. Besides AE cumulative parameters, the Ib-values calculated from AE signals of ECC matrix and ECC-rebar interface were analyzed and compared, which behaved more effectively in identifying the development of cracks and distinguishing the maximum bond stress. Also, the AE intensity analysis was implemented to identify the micro-mechanism transformation during different bonding stages. Moreover, the AE intensity results of CC-rebar obtained from previous research and ECC-rebar in this study were compared.
Keyword ：
Engineered cementitious composites (ECC) Engineered cementitious composites (ECC) Damage characteristics Damage characteristics Damage classification Damage classification Acoustic emission (AE) Acoustic emission (AE) Pull-out test Pull-out test
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| GB/T 7714 | Shan, Wenchen , Liu, Jiepeng , Ding, Yao et al. Assessment of bond-slip behavior of hybrid fiber reinforced engineered cementitious composites (ECC) and deformed rebar via AE monitoring [J]. | CEMENT & CONCRETE COMPOSITES , 2021 , 118 . |
| MLA | Shan, Wenchen et al. "Assessment of bond-slip behavior of hybrid fiber reinforced engineered cementitious composites (ECC) and deformed rebar via AE monitoring" . | CEMENT & CONCRETE COMPOSITES 118 (2021) . |
| APA | Shan, Wenchen , Liu, Jiepeng , Ding, Yao , Mao, Weihao , Jiao, Yubo . Assessment of bond-slip behavior of hybrid fiber reinforced engineered cementitious composites (ECC) and deformed rebar via AE monitoring . | CEMENT & CONCRETE COMPOSITES , 2021 , 118 . |
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Abstract ：
Acoustic emission (AE) technology is widely used in structural health monitoring. Glass sand (GS) made from waste glass is a promising replacement aggregate for quartz sand (QS) in ultra-high performance concrete (UHPC). This paper addresses the effects of different factors including water-binder ratio, length of basalt fiber (BF) and ratio of GS replacing QS on the fluidity and flexural strength of UHPC notched beam under four-point flexural loads. Meanwhile, the fracture characteristics of UHPC notched beam were characterized through acoustic emission (AE) technique. The results show that water-binder ratio and replacement ratio of GS present a positive correlation with work performance of UHPC, while length of BF exhibits a negative one. The flexural strength of UHPC notched beams can be improved by the decrease of the water-binder ratio and fiber length. The effect of water-binder ratio on flexural strength is the most significant, while the addition of GS presents the minimum one. The fracture characteristics of UHPC notched beams could be favorably characterized by AE parameters. Through the analysis and comparison of the evolution of AE parameters, the differences in fracture properties of UHPC notched beams with different flexural strengths can be realized. Through this study, the fluidity and flexural performance of UHPC produced by replacing QS with GS were demonstrated, which is beneficial to the cleaner production of UHPC. Meanwhile, the AE technique presented great potential for fracture characterization of UHPC notched beam, which also provided a promising method for real-time monitoring of cracking in the diagnosis of UHPC structures.
Keyword ：
fracture characterization fracture characterization notched beam notched beam UHPC UHPC material factor influence material factor influence AE AE
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| GB/T 7714 | Wang, Xianqiang , Liu, Duo , Zhang, Yao et al. Fracture Characterization of Ultra-High Performance Concrete Notched Beams under the Influence of Different Material Factors Based on Acoustic Emission Technique [J]. | MATERIALS , 2021 , 14 (16) . |
| MLA | Wang, Xianqiang et al. "Fracture Characterization of Ultra-High Performance Concrete Notched Beams under the Influence of Different Material Factors Based on Acoustic Emission Technique" . | MATERIALS 14 . 16 (2021) . |
| APA | Wang, Xianqiang , Liu, Duo , Zhang, Yao , Jiao, Yubo . Fracture Characterization of Ultra-High Performance Concrete Notched Beams under the Influence of Different Material Factors Based on Acoustic Emission Technique . | MATERIALS , 2021 , 14 (16) . |
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Abstract ：
The adhesion between asphalt binder and aggregate is very important to the performance and durability of asphalt pavement. In order to explore the characterisation of modified asphalt binder in microstructure during aging and rejuvenation, the virgin asphalt binder and three kinds of modified asphalt binder (styrene-butadiene-styrene block copolymer (SBS), rubber powder and high viscosity and high elasticity [HVHE] modifier) in different aging and rejuvenation condition were prepared. The micromorphology and surface adhesion were measured by atomic force microscopy. The average roughness value was used as the index to evaluate the micromorphology of asphalt binder. The surface adhesion was used as the index to evaluate the adhesion properties of asphalt binder. Results show that the "bee" structure of SBS-modified asphalt binder increased slightly after long-term aging, and the recovery effect of aromatics oil was the closest to that of the unaged one. The rubber powder-modified asphalt binder and HVHE-modified asphalt binder showed the spot structure. And no matter for short-term aging or long-term aging, aromatics oil had the best recovery effect on micro morphology. The adhesion of the three modified asphalts would decrease gradually after aging. The effects of three kinds of rejuvenator on the adhesion of SBS-modified asphalt binder and rubber powder-modified asphalt binder were different. Rejuvenator, aromatic oil and warm mix asphalt mixture (WMA) additive could rejuvenate the loss of adhesion of HVHE-modified asphalt binder to a certain extent.
Keyword ：
aging aging micromorphology micromorphology surface adhesion surface adhesion asphalt binder asphalt binder modifier modifier rejuvenation rejuvenation AFM AFM
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| GB/T 7714 | Guo, Meng , Liang, Meichen , Jiao, Yubo et al. Effect of aging and rejuvenation on adhesion properties of modified asphalt binder based on AFM [J]. | JOURNAL OF MICROSCOPY , 2021 , 284 (3) : 244-255 . |
| MLA | Guo, Meng et al. "Effect of aging and rejuvenation on adhesion properties of modified asphalt binder based on AFM" . | JOURNAL OF MICROSCOPY 284 . 3 (2021) : 244-255 . |
| APA | Guo, Meng , Liang, Meichen , Jiao, Yubo , Tan, Yiqiu , Yu, Jianxin , Luo, Daisong . Effect of aging and rejuvenation on adhesion properties of modified asphalt binder based on AFM . | JOURNAL OF MICROSCOPY , 2021 , 284 (3) , 244-255 . |
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Abstract ：
Asphalt pavement is inevitably affected by the rainfall in service stage. The interaction between vehicle and rainfall would cause the hydrodynamic pressure. What's more, pavement temperature also is changing with time. Temperature history and hydrodynamic pressure would influence the moisture diffusion in the pavement. Thereby, moisture uptake of stone, asphalt mortar and mixture at different temperatures and pressures were obtained by weighing. A pressured device was developed to evaluate impact of pressure on the moisture uptake. Diffusion coefficients of those materials were determined based on Fick's second law. And then, 2D micro mechanical FE model of asphalt mixture was developed with the help of digital image processing technology. Effects of temperature and pressure on moisture diffusion depth were analyzed using FEM. Results showed that the rise in temperature and pressure caused the increment of diffusion coefficient. This also resulted in the ascending of moisture diffusing depth. Influence of mortar characteristic on moisture diffusion was more significant than that of aggregate. Under the actions of wet-dry cycles, the moisture concentration in the deep part of mixture risen monotonously, while it varied periodically in the shallow part. The longer the drying period was, the lower the moisture concentration. Moisture concentration of asphalt pavement may be largest at 0.2-0.5 times the layer thickness after intermittent rainfalls. Although pressure can accelerate the diffusion, influence of hydrodynamic pressure on the diffusing depth was not outstanding since the actuation duration of the tire on pavement was too short. (C) 2020 Elsevier Ltd. All rights reserved.
Keyword ：
Moisture diffusion Moisture diffusion Hydrodynamic pressure Hydrodynamic pressure Dense asphalt mixture Dense asphalt mixture Wet-dry cycles Wet-dry cycles Temperature history Temperature history
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| GB/T 7714 | Guo, Qinglin , Liu, Qiang , Zhang, Peng et al. Temperature and pressure dependent behaviors of moisture diffusion in dense asphalt mixture [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2020 , 246 . |
| MLA | Guo, Qinglin et al. "Temperature and pressure dependent behaviors of moisture diffusion in dense asphalt mixture" . | CONSTRUCTION AND BUILDING MATERIALS 246 (2020) . |
| APA | Guo, Qinglin , Liu, Qiang , Zhang, Peng , Gao, Ying , Jiao, Yubo , Yang, Hanchao et al. Temperature and pressure dependent behaviors of moisture diffusion in dense asphalt mixture . | CONSTRUCTION AND BUILDING MATERIALS , 2020 , 246 . |
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Abstract ：
The application of rubber particles made of scrap tires to asphalt mixtures has good economic and social values. Considering the practical performance of asphalt mixtures applied in pavements, this research studied the high temperature stability, low-temperature crack resistance and water stability of a rubber-modified asphalt mixture. Rubber-modified asphalt binder was firstly prepared based on wet process. The corresponding asphalt mixture specimen was then fabricated using Marshall method. Finally, rutting test, low-temperature bending test, Marshall immersion test and freeze-thaw splitting test were carried out, respectively. The experimental results showed that the addition of rubber particles significantly improved the high-temperature stability of the asphalt mixture with dynamic stability enhancing by 102%. The low-temperature crack resistance and water stability performance of the rubber-modified asphalt mixture were better than that of the matrix asphalt mixture, which increased by 49% and 5% for low temperature flexural strength and freeze-thaw splitting tensile strength, respectively. Due to the addition of rubber particles, the pavement performance of the rubber-modified asphalt mixture improved.
Keyword ：
environmentally benign processing environmentally benign processing property property polymeric materials polymeric materials
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| GB/T 7714 | Liu, Hanbing , Luo, Guobao , Wang, Xianqiang et al. Laboratory evaluation of the pavement performance of a rubber-modified asphalt mixture [J]. | EMERGING MATERIALS RESEARCH , 2020 , 9 (1) : 99-103 . |
| MLA | Liu, Hanbing et al. "Laboratory evaluation of the pavement performance of a rubber-modified asphalt mixture" . | EMERGING MATERIALS RESEARCH 9 . 1 (2020) : 99-103 . |
| APA | Liu, Hanbing , Luo, Guobao , Wang, Xianqiang , Jiao, Yubo . Laboratory evaluation of the pavement performance of a rubber-modified asphalt mixture . | EMERGING MATERIALS RESEARCH , 2020 , 9 (1) , 99-103 . |
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Abstract ：
This study aims to adopt the acoustic emission (AE) technique to evaluate the reinforcing effect of basalt and steel fibers on the fracture resistance of asphalt concrete (AC) under indirect tension (IDT) testing at low temperature. Control asphalt concrete (CAC) with no fibers was also tested for comparison. The AE counts and durations were recorded and analyzed to characterize the fracture processes of basalt fiber reinforced asphalt concretes (BFRAC) and steel fiber reinforced asphalt concretes (SFRAC), which were compared with the results from static displacement and strain data obtained through digital image correlation (DIC). The results revealed that the low-temperature fracture processes of BFRAC and SFRAC could be effectively divided into four stages according to the evolutions of AE parameters and corresponding cumulative AE parameters. AE properties could effectively evaluate the reinforcing effects of basalt and steel fibers on the low-temperature fracture resistance of AC, whereas static displacement and strain failed to identify the effects. BFRAC with a fiber length of 12 mm (BFRAC-12) had favorable ductile property at the final failure stage, whereas BFRAC with a fiber length of 6 mm (BFRAC-6), SFRAC with a fiber length of 6 mm (SFRAC-6), and SFRAC with a fiber length of 12 mm (SFRAC-12) exhibited brittle characteristics based on variations of AE parameters. Good correlations between the curve characteristics of AE parameters and the failure loads of AC specimens can be observed. The AE technique demonstrated great potential for the damage fracture characterization of asphalt materials.
Keyword ：
Acoustic emission Acoustic emission Reinforcement effect Reinforcement effect Fracture behavior Fracture behavior Steel fiber Steel fiber Asphalt concrete Asphalt concrete Basalt fiber Basalt fiber
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| GB/T 7714 | Jiao, Yubo , Zhang, Lidong , Guo, Qinglin et al. Acoustic Emission-Based Reinforcement Evaluation of Basalt and Steel Fibers on Low-Temperature Fracture Resistance of Asphalt Concrete [J]. | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2020 , 32 (5) . |
| MLA | Jiao, Yubo et al. "Acoustic Emission-Based Reinforcement Evaluation of Basalt and Steel Fibers on Low-Temperature Fracture Resistance of Asphalt Concrete" . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING 32 . 5 (2020) . |
| APA | Jiao, Yubo , Zhang, Lidong , Guo, Qinglin , Guo, Meng , Zhang, Yao . Acoustic Emission-Based Reinforcement Evaluation of Basalt and Steel Fibers on Low-Temperature Fracture Resistance of Asphalt Concrete . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2020 , 32 (5) . |
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