Search Results - "WITTMANN, H. F"

Neutron imaging of water penetration into cracked steel reinforced concrete by Zhang, P., Wittmann, F.H., Zhao, T., Lehmann, E.H.

“…Service life and durability of reinforced concrete structures have become a crucial issue because of the economical and ecological implications. Service life…”
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Crack formation and fracture energy of normal and high strength concrete by Wittmann, F. H.

“…The crack path through composite materials such as concrete depends on the mechanical interaction of inclusions with the cement-based matrix. Fracture energy…”
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Boundary effect on concrete fracture and non-constant fracture energy distribution by Duan, Kai, Hu, Xiaozhi, Wittmann, F.H.

“…This paper extends the local fracture energy concept of Hu and Wittmann [29,30], and proposes a bilinear model for boundary or size effect on the fracture…”
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Drying, moisture distribution, and shrinkage of cement-based materials by Ayano, T, Wittmann, F H

“…The aim of this study was to develop a new method to determine hygral diffusion, film, and shrinkage coefficients of cement-based materials. These coeffcients…”
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Neutron radiography of water exchange across the interface between old and fresh mortar by Xue, Shanbin, Zhang, Peng, Lehmann, E.H., Hovind, J., Wittmann, F.H.

“…•Initial moisture conditions of old mortar for water extraction from fresh mortar were examined by neutron imaging.•Reversed water migration between repair…”
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Water repellent surface impregnation for extension of service life of reinforced concrete structures in marine environments: The role of cracks by Dai, Jian-Guo, Akira, Y., Wittmann, F.H., Yokota, H., Zhang, Peng

“…The enhancement of long-term durability of marine structures is a matter of interest to many researchers. The study presented in this paper examines the…”
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Determination of moisture distributions in porous building materials by neutron transmission analysis by Pleinert, H, Sadouki, H, Wittmann, F H

“…The movement of moisture inside building structures can affect them in important ways, causing physical and chemical damage. Therefore the study of moisture…”
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Explanation of size effect in concrete fracture using non-uniform energy distribution by Duan, K., Hu, X. -Z., Wittmann, F. H.

“…A local fracture energy model originally proposed to explain the influence of fracture process zone (FPZ) on fracture energy of cementitious materials is…”
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Operating stability of light-emitting polymer diodes based on poly(p-phenylene vinylene) by Carter, J. C., Grizzi, I., Heeks, S. K., Lacey, D. J., Latham, S. G., May, P. G., Ruiz de los Paños, O., Pichler, K., Towns, C. R., Wittmann, H. F.

“…We have developed modified poly(p-phenylene vinylene) (PPV) to improve its performance in organic electroluminescent devices. Encapsulated single-layer devices…”
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Size effect on fracture resistance and fracture energy of concrete by DUAN, K, HU, X.-Z, WITTMANN, F.H

“…A recent asymptotic approach dealing with the size effect on the fracture properties of a large plate is further developed to consider the influence of both…”
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Influence of size on fracture energy of concrete by TRUNK, B, WITTMANN, F.H

“…Concrete structures frequently exhibit cracks. In order to investigate the influence of cracks on durability and the remaining load bearing capacity of…”
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Fracture mechanics parameters of autoclaved aerated concrete by Trunk, B., Schober, G., Helbling, A.K., Wittmann, F.H.

“…The influence of the expanding direction of Autoclaved Aerated Concrete (AAC) on the nonlinear fracture mechanics parameters is determined on three different…”
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Early chemical shrinkage due to dissolution and hydration of cement by Beltzung, F, Wittmann, F H

“…New investigations into very early volume change of aqueous cement dispersions allow us to understand better what is meant by the general term 'chemical…”
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Visualization and quantification of water movement in porous cement-based materials by real time thermal neutron radiography: Theoretical analysis and experimental study by Zhang, Peng, Wittmann, F H, Zhao, TieJun, Lehmann, E, Jin, ZuQuan

“…Water movement in porous cement-based materials is of great importance when studying their deterioration processes and durability. Many traditional methods…”
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Drying, moisture distribution, and shrinkage of cement-based materials by Ayano, T.

“…The aim of this study was to develop a new method to determine hygral diffusion, film, and shrinkage coefficients of cement-based materials. These coefficients…”
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Explanation of size effect in concrete fracture using non-uniform energy distribution by Duan, K.

“…A local fracture energy model originally proposed to explain the influence of fracture process zone (FPZ) on fracture energy of cementitious materials is…”
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Enhanced photocurrent response in photocells made with platinum-poly-yne/C60 blends by photoinduced electron transfer by KÖHLER, A, WITTMANN, H. F, FRIEND, R. H, KHAN, M. S, LEWIS, J

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Probabilistic aspects of fracture energy of concrete by Wittmann, F. H., Slowik, V., Alvaredo, A. M.

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Early chemical shrinkage due to dissolution and hydration of cement by BELTZUNG, F, WITTMANN, F.H

“…New investigations into very early volume change of aqueous cement dispersions allow us to understand better what is meant by the general term 'chemical…”
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Influence of size on fracture energy of concrete by Trunk, B, Wittmann, F H

“…Concrete structures frequently exhibit cracks. In order to investigate the influence of cracks on durability and the remaining load bearing capacity of…”
Get full text