Fraunhofer Institute for Wood Research
Wilhelm-Klauditz-Institut WKI
Fraunhofer Institute for Wood Research
Wilhelm-Klauditz-Institut WKI

Junior research group

© Fraunhofer WKI | Manuela Lingnau

The Fraunhofer WKI and the Institute of Building Materials, Concrete Construction and Fire Safety (iBMB) of the Technische Universität Braunschweig offer young scientists the possibility of setting up a joint working group in order to develop innovative solutions for the buildings of the future. A multidisciplinary junior research group is currently investigating the long-term behavior and durability of wood-hybrid systems for load-bearing structures in building construction. The junior research group is funded by the German Federal Ministry of Food and Agriculture (BMEL). Project management is the responsibility of the Fachagentur für Nachwachsende Rohstoffe e. V. (German government agency for renewable resources).

Members

Contact Press / Media

Dr. Ahmad Al-Qudsi

Structural dynamics, vibration testing, numerical simulation

Fraunhofer Institute for Wood Research, Wilhelm-Klauditz-Institut WKI
Beethovenstraße 51F
38106 Braunschweig, Germany

Phone +49 531 120496-22

Contact Press / Media

Ali Nemati Giv M. Sc.

Institute of Building Materials, Concrete Construction and Fire Safety

TU Braunschweig
Hopfengarten 20
38102 Braunschweig, Germany

Phone +49 531 22077-24

Associated Members

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Haoze Chen M. Sc.

Institute of Building Materials, Concrete Construction and Fire Safety

TU Braunschweig
Hopfengarten 20
38102 Braunschweig, Germany

Phone +49 531 22077-24

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Junaid Ajaz Dand M. Sc.

Institute of Building Materials, Concrete Construction and Fire Safety

TU Braunschweig
Hopfengarten 20
38102 Braunschweig, Germany

Phone +49 531 22077-24

Contact Press / Media

Wenzhuo Ma M. Sc.

Institute of Building Materials, Concrete Construction and Fire Safety

TU Braunschweig
Hopfengarten 20
38102 Braunschweig , Germany

Phone +49 531 22077-24

Publications by the junior research group

Publications by the junior research group which are created within the framework of the joint research work during the funding period are listed here.

2024

TITLE/AUTHOR PubliCation
Experimental study and numerical simulation of adhesively bonded timber-concrete composite panels: bending behavior, adhesive shear and peel stress distributions
Nemati Giv, Ali; Fu, Qiuni; Chen, Zhuo; Leusmann, Thorsten; Kasal, Bohumil; Lowke, Dirk; Yan, Libo		 Engineering Structures, Vol. 307, 117872
Freeze-thaw, chloride penetration and carbonation resistance of natural and recycled aggregate concrete containing rice husk ash as replacement of cement
Ma, Wenzhuo; Lv, Bodong; Wang, Yutong; Huang, Liang; Yan, Libo; Kasal, Bohumil		 Journal of Building Engineering, Vol. 86, Art. 108889
Moisture-induced stresses and damage in adhesively bonded timber-concrete composite connection
Fu, Qiuni; Xu, Ranwu; Kasal, Bohumil; Wei, Yang; Yan, Libo		 Construction and Building Materials, Vol. 416, Art. 135184
Optimisation and prediction of compressive properties for concrete containing recycled aggregates and rice husk ash using response surface methodology (RSM)
Ma, Wenzhuo; Wang, Yutong; Huang, Liang; Yan, Libo; Kasal, Bohumil		 ce/papers, Vol. 6, Issue 6, Pages 1009 – 1014

2023

TITLE/AUTHOR PubliCation
Moisture diffusion and tensile properties of epoxy-based and polyurethane-based flax-glass hybrid FRP under hygrothermal and weathering environments
Huang, Silu; Yan, Libo; Kasal, Bohumil; Wei, Yang		 Composites Part B: Engineering, Vol. 267, Art. 111049
Design of Experiments-Based Fire Performance Optimization of Epoxy and Carbon-Fiber-Reinforced Epoxy Polymer Composites
Pöhler, Christoph; Hamza, Marwa; Kolb, Torsten; Bachtiar, Erik; Yan, Libo; Kasal, Bohumil		 Polymers, Vol. 15 (20), Art. 4096
Autoclaved steel slag coarse aggregate: A potential solution for sustainable concrete production
Chen, Zhijun; Huang, Liang; Yan, Libo; Cai, Heng; Luo, Xiaofeng; Li, Yin		 Construction and Building Materials, Vol. 400, Art. 132627
Characterization of local compressive behavior for bamboo scrimber loaded perpendicular to the grain
Li, Hao; Wei, Yang; Yan, Libo; Semple, Katherine E.; Dai, Chunping		 Construction and Building Materials, Vol. 397, Art. 132421
Bending behavior and bond analysis on adhesively bonded glulam-concrete panels fabricated with wet bonding technique
Nemati Giv, Ali; Chen, Zhuo; Fu, Qiuni; Leusmann, Thorsten; Yan, Libo; Lowke, Dirk; Kasal, Bohumil		 Journal of Building Engineering, Vol. 76, Art. 107140
Cyclic stress-strain behavior and model for FRP-confined engineered cementitious composite
Yuan, Wanying; Han, Qiang; Bai, Yulei; Yan, Libo		 Journal of Building Engineering, Vol. 27, Art. 04023034
Long-term pull-out behavior of coir fiber from cementitious material with statistical and microstructural analysis
Wang, Bo; Yan, Libo; Kasal, Bohumil		 Construction and Building Materials, Vol. 385, Art. 131533
In-plane compressive behavior of short cross-laminated bamboo and timber
Li, Hao; Wei, Yang; Yan, Libo; Semple, Katherine E.; Dai, Chunping		 Industrial Crops and Products, Vol. 200, Art. 116807
Natural and recycled aggregate concrete containing rice husk ash as replacement of cement: Mechanical properties, microstructure, strength model and statistical analysis
Ma, Wenzhuo; Wang, Yutong; Huang, Liang; Yan, Libo, Kasal, Bohumil		 Journal of Building Engineering, Vol. 66, Art. 105917
Multi-scale investigation of morphological, physical and tensile properties of flax single fiber, yarn and unidirectional fabric
Aldroubi, Souher; Kasal, Bohumil; Yan, Libo; Bachtiar, Erik		 Composites Part B: Engineering, Vol. 259, Art. 110732
Influence of wood pretreatment, hardwood and softwood extractives on the compressive strength of fly ash-based geopolymer composite
Asante, Bright; Appelt, Jörn; Yan, Libo; Krause, Andreas		 Journal of Materials Science, Vol. 58, Issue 13, Pages 5625 – 5641
Flexural behaviour of wood beams strengthened by flax-glass hybrid FRP subjected to hygrothermal and weathering exposures
Huang, Silu; Yan, Libo; Kasal, Bohumil		 Construction and Building Materials, Vol. 365, Art. 130076
Microstructural analysis, physical, chemical components and tensile properties of coir fibre long-term exposed in Ca(OH)2 as representative of concrete pore solution
Wang, Bo; Yan, Libo; Xu, Ranwu Xu; Kasal, Bohumil		 Journal of Cleaner Production, Vol. 385, Art. 135693

2022

TITLE/AUTHOR PubliCation
Durability of epoxy and polyurethane bonded timber-hybrid FRP joints under hygrothermal and weathering conditions
Huang, Silu; Yan, Libo; Bachtiar, Erik; Kasal, Bohumil		 Journal of Building Engineering, Vol. 58, Art. 104989
The effect of adhesive amount and type on failure mode and shear strength of glued timber-concrete joints
Nemati Giv, Ali;  Fu, Qiuni; Yan, Libo; Kasal, Bohumil		 Construction and Building Materials, Vol. 345, Art. 128375
Durability of epoxy and polyurethane bonded timber-hybrid FRP joints under hygrothermal and weathering conditions
Huang, Silu; Yan, Libo; Bachtiar, Erik; Kasal, Bohumil		 Journal of Building Engineering, Vol. 58, Art. 104989
Multi-scale investigation on fibre-reinforced composite materials: from structural design, property characterization to engineering applications
Tam, Lik-ho; Wu, Chao; Yan, Libo; Lau, Denvid		 Frontiers in Materials, Vol. 9, Art. 924213
Jute fiber-reinforced polymer tube-confined sisal fiber-reinforced recycled aggregate concrete waste
Gao, Chang; Fu, Qiuni;  Huang, Liang; Yan, Libo; Gu, Guangming		 Polymers, Vol. 14, Issue 6, Art. 1260
Bond behaviour between flax-glass hybrid fibre reinforced epoxy composite and laminated veneer lumber joints
Huang, Silu; Yan, Libo; Bachtiar, Erik; Gao, Chejie; Kasal, Bohumil		 Journal of Building Engineering, Vol. 50, Art. 104207
A review of coir fibre and coir fibre reinforced cement-based composite materials (2000–2021)
Wang, Bo; Yan, Libo; Kasal, Bohumil		 Journal of Cleaner Production, Vol. 338, Art. 130676
Bond behaviour and thermal stability of flax/glass hybrid fibre reinforced polymer–timber structures connected by polyurethane
Huang, Silu; Bachtiar, Erik; Yan, Libo; Kasal, Bohumil		 Construction and Building Materials, Vol. 322, Art. 126456

2021

TITLE/AUTHOR PubliCation
Interfacial bond strength of epoxy and PUR adhesively bonded timber-concrete composite joints manufactured in dry and wet processes
Nemati Giv, Ali; Fu, Qiuni; Yan, Libo; Kasal, Bohumil		 Construction and Building Materials, Vol. 311, Art. 125356
Compressive performance of fiber reinforced polymer encased recycled concrete with nanoparticles. 
Gao, Chang; Huang Liang; Yan, Libo; Kasal, Bohumil; Li, Wengui; Jin, Ruoyu, et al. 		 Journal of Materials Research and Technology, Vol. 14, pages 2727-2738
Flax FRP tube and steel spiral dual-confined recycled aggregate concrete: experimental and analytical studies.
Huang, Liang; Liang, Jinmei; Gao, Chang; Yan, Libo		 Construction and Building Materials, Vol. 300, Art. 124023
Bending and shear behavior of engineered wood-concrete composite decks.
Fu, Qiuni; Yan, Libo; Kasal, Bohumil		 International Conference on Concrete Sustainability (fib ICCS20-21); Prague, Czech Republic, 8-10 September 2021
Interfacial Bond Behavior of Adhesively-Bonded Timber/Cast in situ Concrete (Wet Bond Process).
Nemati Giv, Ali; Fu, Qiuni; Yan, Libo; Kasal, Bohumil
Characterization of interfacial properties between fibre and polymer matrix in composite materials – A critical review
Huang, Silu; Fu, Quini; Yan, Libo; Kasal, Bohumil		 Journal of Materials Research and Technology, Vol. 13,  pages 1441-1484
A Comprehensive Review on Recycled Aggregate and Recycled Aggregate Concrete
Wang, Bo; Yan, Libo; Fu, Quini; Kasal, Bohumil		 Resources, Conservation & Recycling, Vol. 171, Art. 105565
Effects of concrete type, concrete surface conditions and wood species on interfacial properties of adhesively-bonded timber - concrete composite joints
Fu, Quini; Yan, Libo; Thielker, N.A.; Kasal, Bohumil		 International Journal of Adhesion and Adhesives, Vol. 107, Art. 102859
Chapter 3: Natural/Synthetic Fibre Reinforced Bioepoxy Composites
Wang, Bo; Huang, Silu; Yan, Libo		 Book “Bio-Based Epoxy Polymers, Blends and Composites: Synthesis, Properties, Characterization and Applications”, Wiley-VCH, 1st Edition February 2021
Mixed-mode I/II fracture criteria for adhesively-bonded pultruded GFRP/steel joint
Jiang, Zhengwen; Fang, Zhi; Yan, Libo; Wan, Shui; Fang Yawei		 Composite Structures, Vol. 255, Art. 113012
FRP-strengthened timber structures
Kasal, Bohumil; Yan, Libo		 Reinforcement of Timber Elements in Existing Structures, RILEM State-of-the-art report, Volume 33
Chapter 8: Composites for rehabilitation, strengthening, retrofit and repair
Pöhler, Christoph; Bachtiar, Erik; Yan, Libo; Kasal, Bohumil		 Book “Composite Materials: Manufacturing, Properties and Applications”, Elsevier, 1st Edition 2021
Chapter 7: Durability and life prediction of fiber reinforced polymer composites
Nemati Giv, Ali; Fu, Quini; Yan, Libo; Kasal, Bohumil
Chapter 6: Interphase and interfacial properties in composite materials
Huang, Silu; Wang, Bo; Yan, Libo

2020

TITLE/AUTHOR PubliCation
Numerical study on I-section steel-reinforced concrete-filled steel tubes (SRCFST) under bending
Wang, Jun; Cheng, Xianfeng; Yan, Libo; Wu, Chao		 Engineering Structures, Elsevier, Vol. 225 (2020), Art. 111276
Mechanical performance of CFRP-confined sustainable geopolymeric recycled concrete under axial compression
Tang, Zhuo.; Li, Wengui; Tam, Vivian W.Y.; Yan, Libo		 Engineering Structures, Elsevier, Vol. 225 (2020), Art. 111276
Mechanical behaviors of CFRP-confined sustainable geopolymeric recycled aggregate concrete under both static and cyclic compressions
Tang, Zhuo; Li, Wengui; Tam, Vivian W.Y.; Yan, Libo 		 Composite Structures, Elsevier, Vol. 252 (2020), Art. 112750
Seismic performance of mortarless reinforced masonry walls
Huang, Liang; Lu, Yuiqui; Yan, Libo; Kasal, Bohumil; Wang, Lu; Zhang, Tongyue		 Journal of Building Engineering, Elsevier, Vol. 31 (2020), Art. 101368
Monotonic and cyclic axial compressive properties and modeling of basalt FRP-retrofitted predamaged short columns
Ma, Gao; Chen, Xiaohuang; Yan, Libo; Hwang, Hyeon-Jong		 Journal of Composites for Construction, American Society of Civil Engineers, Vol. 24 (2020), Issue 4
Sustainable green technology for recovery of cotton fibers and polyester from textile waste
Yousef, Samy; Tatariants, Maksym; Tichonovas, Martynas; Kliucininkas, Linas;  Yan Libo 		 Journal of Cleaner Production, Elsevier, Vol. 254 (2020), Art. 120078
Mechanical properties of recycled aggregate concrete modified by nano-particles
Gao, Chang; Huang, Liang; Yan, Libo; Jin, Ruoyu; Chen, Haoze 		 Construction and Building Materials, Elsevier, Vol. 241 (2020), Art. 118030
Testing methods for shear strength of bond line between concrete and different types of engineered wood
Fu, Quini; Yan Libo; Kasal, Bohumil		 International Journal of Adhesion and Adhesives, Elsevier, Vol. 102 (2020), Art. 102671
Behavior of adhesively bonded engineered wood – Wood chip concrete composite decks: Experimental and analytical studies
Fu, Q.; Yan L.; Ning, T.; Wang, B.; Kasal, B.		 Construction and Building Materials, Elsevier, Vol. 247 (2020), Art. 118578
Interfacial bond behavior between wood chip concrete and engineered timber glued by various adhesives
Fu, Quini; Yan Libo; Ning, Ting; Wang, Bo; Kasal, Bohumil		 Construction and Building Materials, Elsevier, Vol. 238 (2020), Art. 117743

2019

TITLE/AUTHOR PubliCation
Flax, basalt, E-Glass FRP and their hybrid FRP strengthened wood beams: An experimental study
Wang, Bo; Bachtiar, Erik V.; Yan, Libo; Kasal, Bohumil; Fiore, Vincenzo 		 Polymers, MDPI, Online resource 11 (2019), Nr. 8, Art. 1255
Thermal stability, fire performance, and mechanical properties of natural fibre fabric-reinforced polymer composites with different fire retardants
Bachtiar, Erik V.; Kurkowiak, Katarzyna; Yan, Libo; Kasal, Bohumil and Kolb, Torsten 		 Polymers, MDPI, Online resource 11 (2019), Nr. 4, Art. 699, Art. 699

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