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Your search keyword '"Han, Ning-Xu"' showing total 22 results
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22 results on '"Han, Ning-Xu"'

6. Experimental observation of the self-healing microcapsules containing rejuvenator states in asphalt binder

Author

Su, Jun-Feng, Han, Shan, Wang, Ying-Yuan, Schlangen, Erik, Han, Ning-Xu, Liu, Bing, Zhang, Xiao-Long, Yang, Peng, and Li, Wei

Subjects
Asphalt -- Research -- Mechanical properties, Binders (Materials) -- Research, Business, Construction and materials industries
Abstract

ABSTRACT Microcapsules containing rejuvenator are particles used to increase the self-healing capability of asphalt. To date, no reports focus on studying their behaviors in asphalt binders between the aggregates. The [...]

Published
2017
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7. Fabrication and characterization of self-healing microcapsules containing bituminous rejuvenator by a nano-inorganic/organic hybrid method

Author

Wang, Ying-Yuan, Su, Jun-Feng, Schlangen, Erik, Han, Ning-Xu, Han, Shan, and Li, Wei

Subjects
Pavements -- Design and construction, Bituminous materials -- Methods -- Chemical properties, Fourier transform infrared spectroscopy -- Methods, Formaldehyde -- Methods -- Chemical properties, Calcium carbonate -- Methods -- Chemical properties, Business, Construction and materials industries
Abstract

ABSTRACT The aging problem of bitumen leads to pavement failure after years of usage. Microcapsules containing rejuvenator is a promising chemical product applied to improve the self-healing ability of bitumen. [...]

Published
2016
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8. Experimental investigation and mechanism analysis of novel multi-self-healing behaviors of bitumen using microcapsules containing rejuvenator

Author

Su, Jun-Feng, Wang, Ying-Yuan, Han, Ning-Xu, Yang, Peng, and Han, Shan

Subjects
Bituminous materials -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT The aging problem of bitumen leads to pavement failure after years of usage. To improve its self-healing ability, it has been found that microencapsulated rejuvenator within bitumen may be [...]

Published
2016
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9. Electrochemical impedance measurement and modeling analysis of the carbonation behavior for cementititous materials

Author

Dong, Bi-qin, Qiu, Qi-wen, Xiang, Jia-qi, Huang, Can-jie, Xing, Feng, Han, Ning-xu, and Lub, You-yuan

Subjects
Porosity -- Chemical properties -- Measurement -- Analysis, Impedance spectroscopy -- Analysis, Cement -- Chemical properties -- Measurement -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT In this paper, electrochemical impedance spectroscopy (EIS) was adopted as a nondestructive testing method for studying the carbonation behavior of the cementitious materials. A newly proposed electrochemical model was [...]

Published
2014
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19. Design of self‐healing microcapsules containing bituminous rejuvenator with nano‐CaCO3/organic composite shell: Mechanical properties, thermal stability, and compactability.

Author

Yang, Peng, Han, Shan, Su, Jun‐Feng, Wang, Ying‐Yuan, Zhang, Xiao‐Long, Han, Ning‐Xu, and Li, Wei

Subjects
BITUMEN, MICROCRACKS, MOLECULAR capsules, THERMAL stability, NANOINDENTATION, ETHANOL
Abstract

Microencapsulated rejuvenator powder has been used to repair microcracks and improve self‐healing ability of aged bitumen. These microcapsules must retain their integrity in bitumen matrix with necessary special characters such as excellent mechanical properties, thermal stability, and compactability. Herein, novel self‐healing microcapsules containing bituminous rejuvenator with nano‐CaCO3/organic composite shells were developed by in situ polymerization using methanol‐modified melamine‐formaldehyde as organic shell material. The effect of nano‐CaCO3 particle contents on the mechanical properties, thermal stability, and compactability of microcapsules were examined utilizing nanoindentation, thermogravimetric analysis, and visible spectrophotometer. Nano‐CaCO3 particles had greatly enhanced the thermal stability and mechanical properties of the microcapsule because of the higher thermal resistance of nano‐inorganic/organic composite shells. These microcapsules could survive in melting bitumen without destruction. The release curves of microcapsules in ethyl alcohol, relationship between time and logarithmic residual weight of rejuvenator, showed that the nano‐CaCO3/organic composite shell structure led to a higher compactability of microcapsules. POLYM. COMPOS., 39:E1441–E1451, 2018. © 2017 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]

Published
2018
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20. Research on Chloride Penetration Resistance of Phosphoaluminate Cement Concrete

Author

Long, Wu-Jian, Han, Ning Xu, Li, Da Wang, Xing, Feng, Zhao, Ya-Man, Long, Wu-Jian, Han, Ning Xu, Li, Da Wang, Xing, Feng, and Zhao, Ya-Man

Abstract

The chloride penetration resistance of phosphoaluminate cement (PAC) concrete was investigated in this study. The effects of mixture proportioning parameters, including cement content, water–cement ratio (w/c), and superplasticizer content on chloride ion penetration resistance of PAC concrete were investigated by the rapid chloride migration test (RCM). The result shows that the increase of cement content and the decrease of w/c can reduce the coefficient of chloride ion penetration of PAC concrete at a certain range. Moreover, the penetration of chloride ion can be declined effectively when polycarboxylate superplasticizer is employed. The PAC concrete exhibited better chloride penetration resistance compared with normal Portland cement (PC) concrete prepared with the same mixture proportioning parameters. This is due to the fact that the hydration mechanism and the hydration products of PAC concrete are different from that of PC concrete.

Published
2014

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