
Overview
Background
Johnny Ho joined School of Civil Engineering, The University of Queensland (UQ) in Sep 2013 as a Senior Lecturer. Before joining UQ, Dr Ho has been working in both Hong Kong and Brisbane offices of Arup from 2003 to 2007 on some large scale infrastructure projects such as The Stonecutters Bridge in Hong Kong and Ipswich Motorway Upgrade (Wacol to Darra) in Queensland, Australia. In Sep 2007, he joined the Department of Civil Engineering, The University of Hong Kong as an Assistant Professor. Dr Ho’s research interests are on scientific study on dilatancy of High-flowability and -perfromance concrete due to poly-carboxylate based superplasticizers and its application to concrete-filled steel tubular (CFST) and FRP-confined concrete structures. He has developed discrete element modelling of binary packing of 2D discs and 3D spheres using Python and C++ coding. This model, combined with the rheological model of superplasticized concrete, will contribute a more scientific concrete mix design method for low-carbon-footprint, low cost and high performance concrete (HPC) based on wet packing modelling of particles in the fresh concrete with incorporation of multi-sized fillers. Dr Ho is also interested in applying the low-carbon-footprint high-performance concrete to single- and double-skinned concrete-filled-steel-tube and FRP-confined columns with external steel confinement and/or internal concrete expansive agent.
Dr Ho has published over 100 SCI journal papers and 40 conference papers. Two of his journal papers have been awarded the Transactions Prizes in respectively 2004 and 2005 presented by The Hong Kong Institution of Engineers. In 2011, Dr Ho was awarded the Best Presenter in the 11th International Conference on Concrete Engineering and Technology in Malaysia. In 2010, one of his students was awarded The Hong Kong Institution of Engineers Outstanding Paper Award for Young Engineers/Researchers. Dr Ho has also been very successful in obtaining research and teaching grants, including a HK$1.2m General Research Fund (GRF) grant in Hong Kong in 2010, an A$286K ARC Discovery Project (DP) grant in 2015 and a CNY$600K National Science Foundation (NSF) Grant in 2020 in PRC. Dr Ho has also been very successful in supervision of undergraduate student in performing their final year projects/thesis. In 2012 and 2013, two of his Final Year Project students were given the Merit Awards of the ICE (Institution of Civil Engineers) Hong Kong Graduates and Students Papers Competition for the outstanding project work. In 2017, his thesis project student were awarded The HKIE Outstanding Paper Award for Young Engineers/Researchers by the Hong Kong Institution of Engineers and was awarded HKD$5,000 cash prize and a return ticket to and accomodation in Hong Kong for presenting his awarded paper.
Dr Ho is a passionate teacher and one of the most popular lecturers amongst the students. He is responsbile for teaching a broad range of structural engineering courses, which consist of Reinforced concrete design as per EC2, AS3600 and Hong Kong Code, Prestressed concrete design as per EC2 and AS3600, Structural analysis, Finite element method, Design of steel structures as per AS4100, Structual fire engineering. Dr Ho obtained very high teaching (92%) and course (85%) evaluation scores in every semester since 2013 and was awarded the "Most Effective Teacher by Dean’s Commendation Students" in the Faculty of EAIT, UQ, in 2017, 2018, 2020, 2021 and 2022.
Availability
- Associate Professor Johnny Ho is:
- Available for supervision
Fields of research
Qualifications
- Doctor of Philosophy, University of Hong Kong
Research interests
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low-carbon-footprint and high-performance concrete using fillers
Study of the effect of pozzolanic and inert fillers on the strength, workability and durability performance of concrete
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Stress-strain model of confined concrete with silica fume
Study of the effect of adding silica fume on the wet packing density and the constitutive modelling of confined concrete
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Rheology of cement powder paste
Investigation of the dilatancy swerve in superplasticized cement powder paste and mortar
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Packing density physical modelling
Coding developing of modelling packing of multi-sized spheres
Research impacts
To respond to global warming, my research advocates the use of low-carbon footprint high-performance concrete by designing scientifically concrete mixes using theory of packing density, filler technology and concrete/mortar/paste rheometry. The application of this type of concrete in hybrid-confined concrete-filled-steel-tube and FRP-confined conrete columns not only can improve the structural performance and safety of buildings and infrastructures, but also cut down the carbon footprint of the whole construction industry that offers Australia a more sustainable living environment. Theoretical dsicrete element models about the packing of binary 2D discs and 3D spherical particles are produced that will help the future investiagtion of the effect of particle packing in the design mix of concrete and hence developing method for concrete mix design using optimized particle size distribution.
Works
Search Professor Johnny Ho’s works on UQ eSpace
2023
Journal Article
Impact of polyvinyl alcohol fiber on the full life-cycle shrinkage of cementitious composite
Wang, Qing, Xiong, Zihao, Zhang, Jun, Fang, Zhaosong, Lai, Mianheng and Ho, Johnny (2023). Impact of polyvinyl alcohol fiber on the full life-cycle shrinkage of cementitious composite. Journal of Building Engineering, 63 (Part A) 105463, 105463. doi: 10.1016/j.jobe.2022.105463
2022
Journal Article
Closure to "Impact of Elevated Temperatures on the Performance of High-Strength Engineered Cementitious Composite" by Jianqiang He, Qing Wang, Boyu Yao, and Johnny Ho
He, Jianqiang, Wang, Qing, Yao, Boyu and Ho, Johnny (2022). Closure to "Impact of Elevated Temperatures on the Performance of High-Strength Engineered Cementitious Composite" by Jianqiang He, Qing Wang, Boyu Yao, and Johnny Ho. Journal of Materials in Civil Engineering, 34 (12) 07022015, 1-3. doi: 10.1061/(ASCE)MT.1943-5533.0004481
2022
Journal Article
Impact of crumb rubber particle size on the mechanical and microstructure properties of rubberized concrete
Mo, Jinxu, Ren, Fengming, Tian, Shiyu, Wang, Qing and Ho, Johnny Ching Ming (2022). Impact of crumb rubber particle size on the mechanical and microstructure properties of rubberized concrete. Structural Concrete, 24 (3), 4077-4092. doi: 10.1002/suco.202200616
2022
Journal Article
Effective solution for improving rheological properties of cement paste containing zeolite
Wang, Qing, Xiong, Zihao, He, Jianqiang, Lai, Mianheng and Ho, Johnny (2022). Effective solution for improving rheological properties of cement paste containing zeolite. Construction and Building Materials, 351 128780, 1-14. doi: 10.1016/j.conbuildmat.2022.128780
2022
Journal Article
Impact of limestone powder on the mechanical and microstructure properties of magnesium oxychloride cement pastes
Liang, Yuhang, Wang, Qing, Zhang, Chuanmei and Ho, Johnny (2022). Impact of limestone powder on the mechanical and microstructure properties of magnesium oxychloride cement pastes. Journal of Materials in Civil Engineering, 34 (9), 1-12. doi: 10.1061/(asce)mt.1943-5533.0004349
2022
Journal Article
Crumb rubber as partial replacement for fine aggregate in concrete: an overview
Ren, Fengming, Mo, Jinxu, Wang, Qing and Ho, Johnny Ching Ming (2022). Crumb rubber as partial replacement for fine aggregate in concrete: an overview. Construction and Building Materials, 343 128049, 128049. doi: 10.1016/j.conbuildmat.2022.128049
2022
Journal Article
Effect of concrete wet packing density on the uni-axial strength of manufactured sand CFST columns
Lai, Mianheng, Wu, Kaijie, Ou, Xiaoling, Zeng, Mengru, Li, Chengwei and Ho, Johnny Ching Ming (2022). Effect of concrete wet packing density on the uni-axial strength of manufactured sand CFST columns. Structural Concrete, 23 (4), 2615-2629. doi: 10.1002/suco.202100280
2022
Journal Article
Effect of fillers on the behaviour of low carbon footprint concrete at and after exposure to elevated temperatures
Lai, M. H., Huang, Z. C., Wang, C. T., Wang, Y. H., Chen, L. J. and Ho, J. C. M. (2022). Effect of fillers on the behaviour of low carbon footprint concrete at and after exposure to elevated temperatures. Journal of Building Engineering, 51 104117, 104117. doi: 10.1016/j.jobe.2022.104117
2022
Journal Article
Effect of fillers on the mechanical properties and durability of steel slag concrete
Lai, M. H., Chen, Z. H., Wang, Y. H. and Ho, J. C. M. (2022). Effect of fillers on the mechanical properties and durability of steel slag concrete. Construction and Building Materials, 335 127495, 127495. doi: 10.1016/j.conbuildmat.2022.127495
2022
Journal Article
Effect of fillers on the behaviour of heavy-weight concrete made by iron sand
Lai, M. H., Wu, K. J., Cheng, X., Ho, J. C. M., Wu, J. P., Chen, J. H. and Zhang, A. J. (2022). Effect of fillers on the behaviour of heavy-weight concrete made by iron sand. Construction and Building Materials, 332 127357. doi: 10.1016/j.conbuildmat.2022.127357
2022
Journal Article
A 14-year study on ceramic waste slag-based lightweight aggregate concrete
Liang, Yuhang, Wang, Qing, Gan, Wei, Liao, Jinlong, Lai, Mianheng and Ho, Johnny (2022). A 14-year study on ceramic waste slag-based lightweight aggregate concrete. Construction and Building Materials, 330 127152, 1-13. doi: 10.1016/j.conbuildmat.2022.127152
2022
Journal Article
Manufacture and behaviour of innovative 3D printed auxetic composite panels subjected to low-velocity impact load
Wang, L., Sun, J., Ding, T., Liang, Y., Ho, J. C. M. and Lai, M. H. (2022). Manufacture and behaviour of innovative 3D printed auxetic composite panels subjected to low-velocity impact load. Structures, 38, 910-933. doi: 10.1016/j.istruc.2022.02.033
2022
Journal Article
Post-fire behavior of steel slag fine aggregate concrete
Zhuang, Xin, Liang, Yi, Ho, Johnny Ching Ming, Wang, Yu-Hang, Lai, Mianheng, Li, Xuanyang, Xu, Zhenhai and Xu, Yuning (2022). Post-fire behavior of steel slag fine aggregate concrete. Structural Concrete, 23 (6), 3672-3695. doi: 10.1002/suco.202100677
2022
Journal Article
Impact of condensed silica fume on splitting tensile strength and brittleness of high strength self-compacting concrete
Wang, Qing, Yao, Boyu, He, Jianqiang, He, Xixi and Ho, J. C. M. (2022). Impact of condensed silica fume on splitting tensile strength and brittleness of high strength self-compacting concrete. Structural Concrete, 23 (1), 604-618. doi: 10.1002/suco.202000652
2022
Journal Article
Shrinkage, cementitious paste volume, and wet packing density of concrete
Lai, M. H., Binhowimal, S. A.M., Griffith, A. M., Hanzic, L., Chen, Zhouyi, Wang, Qing and Ho, J. C.M. (2022). Shrinkage, cementitious paste volume, and wet packing density of concrete. Structural Concrete, 23 (1), 488-504. doi: 10.1002/suco.202000407
2022
Journal Article
Residual properties of steel slag coarse aggregate concrete after exposure to elevated temperatures
Ho, J. C. M., Liang, Y., Wang, Y. H., Lai, M. H., Huang, Z. C., Yang, D. and Zhang, Q. L. (2022). Residual properties of steel slag coarse aggregate concrete after exposure to elevated temperatures. Construction and Building Materials, 316 125751, 125751. doi: 10.1016/j.conbuildmat.2021.125751
2022
Book Chapter
The retardation process of crack propagation in unconfined high-strength concrete columns due to the introduction of silica fume
Roslee, Ahmad Azmeer, Ho, Johnny Ching Ming and Fernando, Dilum (2022). The retardation process of crack propagation in unconfined high-strength concrete columns due to the introduction of silica fume. Design in maritime engineering: contributions from the ICMAT 2021. (pp. 327-337) edited by Azman Ismail, Wardiah Mohd Dahalan and Andreas Öchsner. Cham, Switzerland: Springer Nature Switzerland. doi: 10.1007/978-3-030-89988-2_25
2021
Journal Article
Determining the specific surface area of coarse aggregate based on sieving curve via image-analysis approach
Wang, Qing, He, Jianqiang, Sun, Jing and Ho, Johnny (2021). Determining the specific surface area of coarse aggregate based on sieving curve via image-analysis approach. Construction and Building Materials, 305 124728, 124728. doi: 10.1016/j.conbuildmat.2021.124728
2021
Journal Article
Impact of elevated temperatures on the performance of high-strength engineered cementitious composite
He, Jianqiang, Wang, Qing, Yao, Boyu and Ho, Johnny (2021). Impact of elevated temperatures on the performance of high-strength engineered cementitious composite. Journal of Materials in Civil Engineering, 33 (9) 04021222. doi: 10.1061/(ASCE)MT.1943-5533.0003812
2021
Journal Article
Dilatancy reversal in superplasticised cementitious mortar
Lai, M. H., Griffith, A. M., Hanzic, L., Wang, Q. and Ho, J. C.M. (2021). Dilatancy reversal in superplasticised cementitious mortar. Magazine of Concrete Research, 73 (16), 828-842. doi: 10.1680/jmacr.19.00435
Supervision
Availability
- Associate Professor Johnny Ho is:
- Available for supervision
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Available projects
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Rheology of cement powder paste/mortar and/or concrete
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Packing density model of multi-sized spheres
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Concrete-filled-steel-tube column with hybrid confinement
Supervision history
Completed supervision
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2022
Doctor Philosophy
Fire Performance of High Strength Concrete using Novel Fire Testing
Associate Advisor
Other advisors: Dr Cristian Maluk, Associate Professor Vinh Dao
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2021
Master Philosophy
The Effect of Self-Consolidating Concrete on the Shear Behaviour of Concrete Beam Elements
Associate Advisor
Other advisors: Associate Professor Liza O'Moore
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2020
Doctor Philosophy
Fillers' application in high-performance Concrete
Associate Advisor
Other advisors: Associate Professor Vinh Dao
Media
Enquiries
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