Searched for: +
(1 - 16 of 16)
document
Nie, Ding (author), Shang, Feng (author), Han, Xun (author)
Concrete dams are subjected to soft water penetration of a high water head during their long service lives. Degradation due to calcium leaching will decrease the durability of the concrete and affect dam safety. The long-term performance of concrete dams due to calcium leaching should be evaluated and predicted accurately to complete the...
conference paper 2021
document
Han, Weiwei (author), Chen, Huisu (author), Zhang, Tao (author)
Magnesium ammonium phosphate cement (MAPC) has been commonly applied in civil engineering. However, the analysis of hydration behavior and composition of solid assemblages still needs further exploration. From thermodynamic simulation, it is shown that the molar ratio between MgO and NH4H2PO4 (M/P ratio) determines the final composition of...
conference paper 2021
document
Han, Yeonjung (author), Chang, Yoon-Seong (author)
The objective of this study was to present the wood properties and drying characteristics of sawtooth oak (Quercus acutissima Carruth.) for the spread of its utilization in South Korea. The annual ring, latewood ratio, dimension of vessels, density, and shrinkage of specimens manufactured from five sawtooth oak trees were measured and compared...
conference paper 2019
document
Chang, Yoon-Seong (author), Kim, Min-Ji (author), Shin, Hyun-Kyeong (author), Han, Yeonjung (author)
Based on the 2017 statistics of the Korea Forest Service, the amount of annual production of domestic roundwood was 4.5 million ㎥. Twenty eight percent of the production was hardwood roundwood. About 80% of the hardwood was Quercus species. The hardwood roundwoods were mainly used for wood chips (50%) and medium density fiberboard (MDF)(26%)....
conference paper 2019
document
Han, T.A. (author), Pereira, L.M. (author), Santos, F.C. (author), Lenaerts, T. (author)
When making a mistake, individuals are willing to apologize to secure further cooperation, even if the apology is costly. Similarly, individuals arrange commitments to guarantee that an action such as a cooperative one is in the others’ best interest, and thus will be carried out to avoid eventual penalties for commitment failure. Hence, both...
conference paper 2013
document
Seo, J.H. (author), Seol, D.M. (author), Lim, T.G. (author), Park, S.T. (author), Han, B.W. (author), Rhee, S.H. (author)
Detailed information of the flow around a ship is essential for designing the hull because it is related to the propeller performance, maneuverability, and vibration. Thus, lots of experimental and computational researches have been executed to measure or analyze the stern flow of vessels. In this paper, the newly installed underwater SPIV...
conference paper 2013
document
Zhu, G. (author), Wu, Z. (author), Zhou, Y. (author), Tang, J. (author), Dong, B. (author), Han, N. (author), Xing, F. (author)
Epoxy E-51/UF resin microcapsules were prepared by traditional two-stepped in situ polymerization method and processing parameters affecting the final microcapsules’ shape and size were carefully studied in the aim to obtain microcapsule with ideally spherical shape and uniform size. It’s found the polycarboxylate surfactant of SMA (styrene...
conference paper 2013
document
Zhu, G. (author), Lü, L. (author), Tang, J. (author), Dong, B. (author), Han, N. (author), Xing, F. (author)
For epoxy microcapsules embedded in concrete as mechanic-triggered self-healing adhesive, globular shape with uniform size is the basic requirement to ensure the solid shell broken and the liquid core released at a designed stress. In this paper, monodispersed melamine–formaldehyde (MF) resin-walled epoxy E-51 microcapsules were successfully...
conference paper 2013
document
Wang, X. (author), Xing, F. (author), Zhang, M. (author), Han, N. (author), Qian, Z. (author)
A new type of self-healing cementitious composites by using organic microcapsules is designed in Guangdong Key Laboratory of Durability for Coastal Civil Engineering, Shenzhen University. For the organic microcapsules, the shell material is urea formoldehyde (UF), and the core healing agent is Epoxy. The effect of organic microcapsules on...
conference paper 2013
document
Zhang, M. (author), Han, N. (author), Xing, F. (author), Wang, X. (author), Schlangen, H.E.J.G. (author)
For a microcapsule based self-healing system in the cementitious material, a fundamental issue is to find and facilitate a suitable microcapsule system, concerning either the material selection or design and manufacture process. In this study, urea formaldehyde resin is used for the shell of microcapsule, and bisphenol – an epoxy resin E-51...
conference paper 2013
document
Dong, B. (author), Wang, Y. (author), Han, N. (author), Xing, F. (author)
A novel chemical self-healing system based on microcapsule technology for cementitious composites is established in Guangdong Key Laboratory of Durability for Coastal Civil Engineering, Shenzhen University. The key issue of this system is how to release the healing material and how to activate the healing mechanism. In this paper, the study is...
conference paper 2013
document
Zhang, J.L. (author), Deng, X. (author), Feng, X. (author), Han, N.X. (author), Jonkers, H.M. (author)
The CaCO3-mineralizing bacteria from different taxonomic groups have shown potential in restoration of construction material such as concretes, cements and stony materials. However, these strains are far from the demand of practical application due to some shortages, including the low mineralizing capacity. In this work, an integrated high...
conference paper 2013
document
Zhang, M. (author), Han, N. (author), Xing, F. (author), Wang, X. (author), Schlangen, H.E.J.G. (author)
An international cooperation research project has been financially supported by China Nature Science Foundation, which consists of three relatively independent, but strategically integrated research sub-programs, aiming at the formation of a selfhealing system based on the microcapsule principle for the cementitious composites. In this paper, a...
conference paper 2013
document
Xiong, W. (author), Zhu, G. (author), Tang, J. (author), Dong, B. (author), Han, N. (author), Xing, F. (author), Schlangen, H.E.J.G. (author)
Poly (urea-formaldehyde) (PUF) shelled dicyclopentadiene (DCPD) microcapsules were prepared by in-situ polymerization technology for self-healing concrete applications. It’s found, during the process, sodium dodecyl benzene sulfonate (SDBS) behaves better in emulsification of DCPD than other surfactant of sodium lauryl sulfate (SLS) and styrene...
conference paper 2013
document
Dong, B. (author), Wang, Y. (author), Han, N. (author), Xing, F. (author)
Based on microcapsule technology, a new type of self-healing system for cementitious composites is established. The performance of the system was characterized by means of electrochemical impedance spectroscopy of steel bars immersed in a simulated concrete environment. The results demonstrate strong inhibition of chloride-induced corrosion when...
conference paper 2013
document
Zhu, G. (author), Zhou, Y. (author), Wu, Z. (author), Tang, J. (author), Dong, B. (author), Han, N. (author), Xing, F. (author)
The microcapsules of epoxy E-51 resin encapsulated by cured itself were prepared by interfacial curing reaction, in which ethylenediamine (EDA) was employed as curing agent and sulfonated copolymer of styrene and maleic anhydride (SMA) as emulsifying agent. It’s found the morphology of microcapsules strongly depend on reaction time and EDA...
conference paper 2013
Searched for: +
(1 - 16 of 16)