Claudia P. Ostertag

Ostertag’s research focuses on digital fabrication and 3D printing of lattice reinforcements for ductility enhancement of cement-based materials, light-weight, multifunctional façade systems for energy-efficient buildings, development, mechanical properties & structural applications of High-Performance Fiber reinforced concrete composites, and durability enhancement through multi-scale crack control, corrosion mitigation, alkali-silica reaction mechanisms, and mitigation strategies.

Only the most recent Archival Journal Papers (2016-2023) are listed here on "various" topics: (for additional publications and publications prior to 2016, please see my CV)

1) 3D printing and Digitally-fabricated reinforcements for mechanical performance enhancement & phase change material encapsulation

• Shao, Y., and Ostertag, C.P., “LEGO-Inspired and digitally-fabricated steel reinforcement case for ultra-high performance concrete (UHPC) beams, Engineering structures, 279 (2023) 115617. https://doi.org/10.1016/j.engstruct.2023.115617
• Salazar, B., Aghdasi, P., Ostertag, C.P., Taylor, H., “Highly compressible concrete: the effect of reinforcement design on concrete’s compressive behavior at high strains”, Materials and Design, 230 (2023) 11942. https://doi.org/10.1016/j.matdes.2023.111942  
• Maier, M., Salazar, B., Aghdasi, P., Unluer, C., Taylor, H., Ostertag, C.P., “Thermal and mechanical performance of a novel 3D printed lattice macro-encapsulation method for phase change materials”, Journal of Building Engineering, 43 (2021), 103124. 
• Salazar, B., Aghdasi, P., Williams, I., Ostertag, C.P., Taylor, H., “Polymer lattice-reinforcement for enhanced ductility of concrete”, Materials and Design, 2020, Vol. 196, 109184.  https://doi.org/10.1016/j.matdes.2020.109184
• Lowke, D., Talke, D., Dressler, I., Weger, D., Gehlen, C., Rael R., Ostertag,  C.P. “Particle-bed 3D-printing by selective cement activation – Applications, material and process technology”, Cement and Concrete Research, 2020, Vol. 134, 106077. https://doi.org/10.1016/j.cemconres.2020.106077
• Aghdasi, P., I. Williams, B. Salazar, N. Panditi, H. Taylor, and C.P. Ostertag, “An Octet-Truss Engineered Concrete (OTEC) for Lightweight Structures,” Composite Structures, 2018, Vol. 207, pp. 373-384.

2) Sustainability; Life cycle analysis; Global warming potential, low CO2 cement, etc

• Will Nguyen, Daniela Martinez Lopez, Gabriel Jen and C. P. Ostertag; "Interaction between global warming potential, durability, and structural properties of fiber-reinforced concrete with high waste materials inclusion" Resources, Conservation & Recycling, 2021, Vol. 169, 105453. https://doi.org/10.1016/j.resconrec.2021.105453
• Maier, M., Javadian, A., Saeidi, N., Inluer, C., Taylor, H., Ostertag, C.P., “Mechanical Properties and Flexural Behavior of Sustainable Bamboo Fiber-Reinforced Mortar”, Applied Sciences, Sept. 2020, Vol. 10, 6587.  https://doi.org/10.3390/app10186587
• Gursel, P. and Ostertag, C.P., “Copper Slag, a Sustainable Solution for Sand Substitution in Concrete”, Advances in Civil Engineering, 2019,https://doi.org/10.1155/2019/6815348
• Gursel, P. and Ostertag, C.P., “Comparative Life-Cycle Impact Assessment of Concrete Manufacturing in Singapore”, International Journal of Life Cycle Assessment, Feb. 2017, Vol. 22, pp. 237–255. 
• Gursel, P. and Ostertag, C.P., “Impact of Singapore's Importers on Life-Cycle Assessment of Concrete”, Journal of Cleaner Production, April 2016, Vol. 118, pp. 140-150. 
• Miller, S., Monteiro, P. J., Ostertag, C.P., and Horvath, A., “Comparison Indices for Design of Concrete taking Environmental Impacts into Account” Cement and Concrete Composites, April 2016, Vol. 68, pp.131-143.
• Miller, S., Monteiro, P. J., Ostertag, C.P., and Horvath, A., “Concrete Mix Proportioning for Desired Strength and Reduced Global Warming Potential”, Construction and Building Materials, Dec. 2016, Vol. 128, pp. 410-421. 
• Gursel, A. P., Maryman, H., and Ostertag, C.P., “A Life-Cycle Approach to Environmental, Mechanical, and Durability Properties of “Green” Concrete Mixes with Rice Husk Ash”, Journal of Cleaner Production, 2015 http://dx.doi.org/10.1016/j.jclepro.2015.06.029.
• Miller, S., Monteiro, P. J., Horvath, A., and Ostertag, C.P. “Reduction in Green House Gas Emission of Concrete using age as a design factor”, Environmental Research Letter, 2015, Vol. 10, 114017

3) Light-weight Multi-functional Façade Systems for energy efficient buildings

• Shao, Y., Parks, A., Ostertag, C.P., “Lightweight concrete façade with multiple air gaps for sustainable and energy-efficient buildings in Singapore”, Building and Environment, 223, 2022, 109463. https://doi.org/10.1016/j.buildenv.2022.109463
• Maier, M., Salazar, B., Aghdasi, P., Unluer, C., Taylor, H., Ostertag, C.P., “Thermal and mechanical performance of a novel 3D printed lattice macro-encapsulation method for phase change materials”, Journal of Building Engineering, 43 (2021), 103124. 
• Hay, R., and Ostertag, C.P., "Life cycle assessment of double-skin façade (DSF) system produced with fiber-reinforced concrete for sustainable and energy-efficient buildings in the tropics," Building & Environment, June 2018, Vol. 142, pp. 327-341. 
• Hay, R., Ostertag, C.P. "Development and Application of High Performance Green Hybrid Fiber-Reinforced Concrete (HP-G-HyFRC) for Sustainable and Energy-Efficient Buildings", Key Engineering Materials, 2014, Vols. 629-630, pp. 299-305.

4) Development of our High Performance HyFRC composite/UHPFRC composites; Interactions of reinforcing bars with various HPFRCCs (including HyFRC, ECC) & UHPFRCs; Structural performance enhancement with HyFRC/ UHPFRC; 

• Shao, Y., and Ostertag, C.P., “Carbon Footprint between Steel-reinforced Concrete and UHPC beams, J. Struct. Eng., 149 (3), (2023) 06023001. https://doi.org/10.1061/JSENDH.STENG-11449
• Shao, Y., and Ostertag, C.P., “Bond-slip behavior of steel reinforced UHPC under flexure: Experiment and prediction” Cement and Concrete Composites, 133 (2022) 104734. https://doi.org/10.1016/j.cemconcomp.2022.104724
• Williams, I., Arteta, C., Shao, Y., Ostertag, C.P., “Hybrid Fiber reinforced Concrete Special Shear Wall Boundary Element in Compression”, Engineering Structures,  252 (2022) 113726.  https://doi.org/10.1016/j.engstruct.2021.113726
• Shao, Yi, Nguyen, W., Bandelt, M., Ostertag, C.P., Billington, S., “Seismic Performance of High-performance Fiber-reinforced Cement-based Composite (HPFRCC) Structural Members: A Review,” Journal of Structural Engineering., 148 (2022) 03122004 https://doi.org/10.1061/(ASCE)ST.1943-541X.0003428 
• Lin, A., and Ostertag, C.P., “Interaction between High Performance Fiber reinforced Cement-based composites and Steel Reinforcement”, Engineering Structures, 247, (2021), 113173. https://doi.org/10.1016/j.engstruct.2021.113173
• Aghdasi, P. and Ostertag, C.P., “Tensile fracture characteristics of Green Ultra-High Performance Fiber-Reinforced Concrete (G-UHP-FRC) with longitudinal steel reinforcement” Cement and Concrete Composites, 2020, Vol. 114, 103749. https://doi.org/10.1016/j.cemconcomp.2020.103749
• Nguyen, W., M.J. Bandelt, W. Trono, , S.L. Billington, and C.P. Ostertag, “Mechanics and failure characteristics of hybrid fiber-reinforced concrete (HyFRC) composites with longitudinal steel reinforcement”, Engineering Structures, 2019, Vol. 183, pp. 247-254.  https://doi.org/10.1016/j.engstruct.2018.12.087
• Afroughsabet, V., A. Lin, C.P. Ostertag, L. Biolzi, G. Geng, and P.M. Monteiro, “The Influence of Expansive Cement on the Mechanical, Physical, and Microstructural Properties of Hybrid-Fiber-Reinforced Concrete,” Cement and Concrete Composites, 2019, Vol. 96, pp. 21-32. https://doi.org/10.1016/j.cemconcomp.2018.11.012
• Aghdasi, P. and Ostertag, C.P., “Green Ultra-High Performance Fiber-Reinforced Concrete (G-UHP-FRC),” Construction and Building Materials, 2018, Vol. 190, pp. 246-254. 
• Teng, S., Afroughsabet, V., Ostertag, C., “Flexural behavior and durability properties of high performance hybrid-fiber-reinforced concrete,” Journal of Construction and Building Materials, June 2018, Vol. 182, pp. 504-515. 
• Chanthabouala, K., Teng, S., Chandra, J., Tan, K.-H. and Ostertag, C.P., “Punching Tests of Double-Hooked-End Fiber Reinforced Concrete Slabs”, ACI Structural Journal, Vol. 115 (6), November 2018; doi: 10.14359/51706891
• Nguyen, W., Trono, W., and Ostertag, C.P. “Seismic response of a rocking bridge column using a precast hybrid fiber-reinforced concrete (HyFRC) tube,” Composite Structures, Vol. 174, Aug. 2017, pp. 252-262.
• Jen, G., Trono, W., and Ostertag, C.P., “Self-consolidating HyFRC: Processing, Properties &Applications”, Construction and Building Materials, Feb. 2016, Vol. 104, pp. 63-71. 
• D. Moreno, W. Trono, G. Jen, C. Ostertag, and S. Billington, “Tension stiffening in Reinforced high performance fiber reinforced cement based composites”, Cement and Concrete Composites, 50, pp. 36-46, 2014
• W. Trono, G. Jen, M. Pamagiotou, M. Schoettler, and C.P. Ostertag, “Shake-Table Response of a Low-Damage Recentering Post-Tensioned HyFRC Bridge Column”, ASCE  J. of Bridge Eng., 2015. 20 (7): 04014096
• M. Panagiotou, W. Trono, G. Jen, P. Kumar, C.P. Ostertag, Experimental Response of HyFRC Bridge Columns with Novel Longitudinal Reinforcement Detailing, ASCE J. of Bridge Eng., http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0000684, 2014
• J Blunt and C.P. Ostertag, “Deflection Hardening and Workability of Hybrid Fiber Composites”, ACI Mat. J., 106, pp. 265-272, 2009. 
• J. Blunt and C.P. Ostertag, “A Performance Based Approach for the Design of a Deflection Hardened Hybrid Fiber Reinforced Concrete,” ASCE Journal of Engineering Mechanics, 135, pp. 978-986, 2009. 

5) Effect of multi-scale crack control in HyFRC on Corrosion; Mechanical Approach to Corrosion Mitigation (for additional publications prior to 2016 see CV)

• Nguyen, W., Duncan, J.F., Devine, T.M., and Ostertag, C.P., “Electrochemical polarization and impedance of reinforced concrete and hybrid fiber-reinforced concrete under cracked matrix conditions” Electrochimica Acta, March 2018, Vol. 271, pp. 319-336. 
• Will Nguyen, Daniela Martinez Lopez, Gabriel Jen and C. P. Ostertag; "Interaction between global warming potential, durability, and structural properties of fiber-reinforced concrete with high waste materials inclusion" Resources, Conservation & Recycling, 2021, Vol. 169, 105453. https://doi.org/10.1016/j.resconrec.2021.105453
• Hay, R. and Ostertag, C.P., “Acidification at steel-concrete interface under accelerated corrosion test in chloride environment” Cement and Concrete Composites, 2020, Vol. 110 103573. https://doi.org/10.1016/j.cemconcomp.2020.103573
• Hay, R. and Ostertag, C.P. “Influence of transverse cracks and interfacial damage on corrosion of steel in concrete with and without fibre hybridization”, Corrosion Science, 2019, Vol. 153, pp. 213-224.   https://doi.org/10.1016/j.corsci.2019.03.020
• Nguyen, W., Duncan, J.F., Jen, G., and Ostertag, C.P., “Influence of matrix cracking and hybrid fiber reinforcement on the corrosion initiation and propagation behaviors of reinforced concrete”, Corrosion Science, June 2018, Vol. 140, pp. 168-181
• Nguyen, W., Duncan, J., Monteiro, P.M. and Ostertag, C.P., “Multi-scale Characterization of Corrosion Initiation of Preloaded Hybrid Fiber-Reinforced Concrete Composites”, Key Engineering Materials, 2016, Vol. 711, pp. 195-202. 
• Jen, G. and Ostertag, C.P., “Experimental Observations of Self-consolidated Hybrid Fiber Reinforced Concrete (SC-HyFRC) on Corrosion Damage Reduction”, Construction and Building Materials, Feb. 2016, Vol. 105, pp. 262-268. 
• Blunt, J., Jen, G., and Ostertag, C.P., “Enhancing Corrosion Resistance of Reinforced Concrete Structures with Hybrid Fiber Reinforced Concrete,” Corrosion Science, 2015, Vol. 92, pp. 182-191. 

6) Effect of HyFRC on Alkali-Silica Reaction (ASR); ASR Mitigation (for additional publications prior to 2019, see my CV)

• Hay, R. and Ostertag, C.P., “New insights into the role of fly ash in mitigating alkali-silica reaction (ASR) in concrete”, Cement and Concrete Research, 2021, Vol. 144, 106440.     https://doi.org/10.1016/j.cemconres.2021.106440
• Hay, R. and Ostertag, C.P., “On the utilization and mechanisms of waste aluminium in mitigating alkali-silica reaction in concrete”, Journal of Cleaner Production, 2019, Vol 212, pp. 864-879. https://doi.org/10.1016/j.jclepro.2018.11.288
• Jen, G., Hay, R., and Ostertag, C.P., “Multi-scale Evaluation of HyFRC Restraint on Alkali Silica Expansion”, Journal of Construction and Building Materials, 2019, Vol. 211, pp. 1117-1126. https://doi.org/10.1016/j.conbuildmat.2019.03.102