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30 results on '"Wong, Hong S."'

11. Methods for characterising the steel–concrete interface to enhance understanding of reinforcement corrosion: a critical review by RILEM TC 262-SCI

Author

Wong, Hong S., Angst, Ueli M., Geiker, Mette R., Isgor, O. Burkan, Elsener, Bernhard, Michel, Alexander, Alonso, Maria Cruz, Correia, Maria Joao, Pacheco, Jose, Gulikers, Joost, Zhao, Yuxi, Criado, Maria, Raupach, Michael, Sørensen, Henrik, François, Raoul, Mundra, Shishir, Rasol, Mezgeen, and Polder, Rob

Published
2022
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15. Influence of aggregate size and fraction on shrinkage induced micro-cracking of mortar and concrete

Author

Grassl, Peter, Wong, Hong S., and Buenfeld, Nick R.

Subjects
Condensed Matter - Materials Science
Abstract

In this paper, the influence of aggregate size and volume fraction on shrinkage induced micro-cracking and permeability of concrete and mortar was investigated. Nonlinear finite element analyses of model concrete and mortar specimens were performed. The aggregate diameter was varied between 2 and 16 mm. Furthermore, a range of volume fractions between 0.1 and 0.5 was studied. The nonlinear analyses were based on a 2D lattice approach in which aggregates were simplified as monosized cylindrical inclusions. The analysis results were interpreted by means of crack width and change of permeability. The results show that increasing aggregate diameter (at equal volume fraction) and decreasing volume fraction (at equal aggregate diameter) greatly increases permeability., Comment: 12th International Conference on Fracture (ICF 12)

Published
2009

16. Influence of aggregate size and volume fraction on shrinkage induced micro-cracking of concrete and mortar

Author

Grassl, Peter, Wong, Hong S., and Buenfeld, Nick R.

Subjects
Condensed Matter - Materials Science
Abstract

In this paper, the influence of aggregate size and volume fraction on shrinkage induced micro-cracking and permeability of concrete and mortar was investigated. Nonlinear finite element analyses of model concrete and mortar specimens with regular and random aggregate arrangements were performed. The aggregate diameter was varied between 2 and 16 mm. Furthermore, a range of volume fractions between 0.1 and 0.5 was studied. The nonlinear analyses were based on a 2D lattice approach in which aggregates were simplified as monosized cylindrical inclusions. The analysis results were interpreted by means of crack length, crack width and change of permeability. The results show that increasing aggregate diameter (at equal volume fraction) and decreasing volume fraction (at equal aggregate diameter), increases crack width and consequently greatly increases permeability., Comment: Submitted to Cement and Concrete Research

Published
2008

25. High-strength clogging resistant permeable pavement.

Author

Kia, Alalea, Wong, Hong S., and Cheeseman, Christopher R.

Subjects
*PAVEMENTS, *FLOOD damage prevention, *CITIES & towns, *COMPRESSIVE strength, *LIGHTWEIGHT concrete, *PERMEABILITY
Abstract

Permeable pavement is utilised in order to alleviate flooding in towns, cities and other urban areas, but it is prone to clogging, has relatively low strength and requires regular maintenance. We have developed a novel permeable pavement with low tortuosity pore structure that can be cast on-site that is not only resistant to clogging, but also has high permeability and strength. This high strength clogging resistant permeable pavement (CRP) was prepared by introducing straight pore channels of varying size and number into self-compacting mortar. Samples with porosity ranging from 2 to 32% were tested. In all cases, permeability and compressive strength were substantially higher than conventional permeable concrete. More significantly, CRP can be engineered with low porosity (5%), high strength (> 50 MPa) and high permeability (> 2 cm/s), but does not clog despite extensive cyclic exposure to flow containing sand and clay. A simple method to model the permeability of CRP from the pore structure is described. We report for the first time a high strength clogging resistant permeable pavement capable of retaining sufficient porosity and permeability for storm-water infiltration without requiring frequent maintenance. This innovative system will help alleviate urban flooding and contribute towards a more sustainable urbanisation. [ABSTRACT FROM AUTHOR]

Published
2021
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30. Optimal design for epoxy polymer concrete based on mechanical properties and durability aspects

Author

Omar Alajarmeh, Rajab Abousnina, Yan Zhuge, Allan Manalo, Peter Schubel, Wahid Ferdous, Hong S. Wong, Ferdous, Wahid, Manalo, Allan, Wong, Hong S, Abousnina, Rajab, AlAjarmeh, Omar S, Zhuge, Yan, and Schubel, Peter

Subjects
Materials science, 0211 other engineering and technologies, 020101 civil engineering, 02 engineering and technology, engineering.material, matrix-to-aggregate ratio, 0905 Civil Engineering, 0201 civil engineering, empirical modelling, Flexural strength, Filler (materials), 021105 building & construction, Ultimate tensile strength, General Materials Science, optimal design, Composite material, Ductility, Civil and Structural Engineering, chemistry.chemical_classification, Building & Construction, resin-to-filler ratio, Polymer concrete, 1202 Building, Building and Construction, Polymer, Epoxy, epoxy polymer concrete, Durability, chemistry, properties, visual_art, visual_art.visual_art_medium, engineering
Abstract

usc Polymer concrete has shown a number of promising applications in building and construction, but its mix design process remains arbitrary due to lack of understanding of how constituent materials influence performance. This paper investigated the effect of resin-to-filler ratio and matrix-to-aggregate ratio on mechanical and durability properties of epoxy-based polymer concrete in order to optimise its mix design. A novel combination of fire-retardant, hollow microsphere and fly ash fillers were used and specimens were prepared using resin-to-filler ratios by volume from 100:0 to 40:60 at 10% increment. Another group of specimens were prepared using matrix-to-aggregate ratios from 1:0 decreasing to 1:0.45, 1:0.90 and 1:1.35 by weight at constant resin-to-filler ratio. The specimens were inspected and tested under compressive, tensile and flexural loading conditions. The epoxy polymer matrix shows excellent durability in air, water, saline solution, and hygrothermal environments. Results show that the resin-to-filler ratio has significant influence on the spatial distribution of aggregates. Severe segregation occurred when the matrix contained less than 40% filler while a uniform aggregate distribution was obtained when the matrix had at least 40% filler. Moreover, the tensile strength, flexural strength and ductility decreased with decrease in matrix-to-aggregate ratio. Empirical models for polymer concrete were proposed based on the experimental results. The optimal resin-to-filler ratio was 70:30 and 60:40 for non-uniform and uniform distribution of aggregates, respectively, while a matrix-to-aggregate ratio of 1:1.35 was optimal in terms of achieving a good balance between performance and cost. Refereed/Peer-reviewed

Published
2019

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