Technical seminar on Use of recycled glass in concrete footpath

Date, time & venue
2018-01-02;6:00 pm – 6:30 pm (Refreshment), 6:30 pm – 7:30 pm (Talk);James Chiu & Dragages Rooms – 9/F


Date: 2 January 2018 (Tuesday)


Speakers: Dr Johnny Ching Ming HO, MPhil, PhD, MHKIE, MIEAust, CPEng, NER, MIStructE, CEng ,School of Civil Engineering, University of Queensland, Australia


Currently, Australia produces 50 million tonnes of waste or 2000 tonnes per person per year. Glass waste is particularly problematic because it does not decompose. In Australia, recycled glass has a low commodity value and there are limited applications for use, particularly for very fine glass. Herein, the speaker will share his study about using recycled glass to replace up to 35% of aggregates by weight in concrete for construction of footpath by the Brisbane City Council. Results showed that when glass is used to replace aggregates, compressive strength decreases while shrinkage increases, which is not good for footpath construction. To restore the compressive strength and shrinkage performance while keeping a significant amount of recycled glass in concrete, limestone filler is proposed to replace part of the cementitious materials up to 25% by weight in order to decrease the interstitial void. The speaker will also discuss the effect of glass size on the performance of concrete including alkali-silica reaction. A suitable concrete mix for footpath construction in Brisbane will be proposed.


About Speaker:

Dr Johnny Ho is a Senior Lecturer in the School of Civil Engineering, The University of Queensland. Before joining the university in 2013, he worked as an Assistant Professor in The University of Hong Kong from 2007-2013. Practically, Dr Ho worked in both Hong Kong and Brisbane offices of Arup on some large scale infrastructure projects such as The Stonecutters Bridge in Hong Kong and the Ipswich Motorway Upgrade (Wacol to Darra) in Brisbane. Dr Ho’s research interests are on mix design of high-performance concrete with multi-sized fillers, rheology of cement paste and mortar, as well as their application in concrete-filled-steel-tube columns.


Enquiries: No registration is required


For enquiries, please contact Ir Jenny Lau at 2867 3682 (email:


For updated information, please browse


CPD certificates will be issued.


Submissions for the Best Reporter Award are invited. Report must be submitted to within two weeks after the seminar.


All information and views expressed by speakers and in their conference materials do not reflect the official opinion and position of the HKIE. No responsibility is accepted by the HKIE or their publisher for such information and views including their accuracy, correctness and veracity.



Copyright © 2023 The Hong Kong Institution of Engineers. All rights reserved.