Topic:

Technical Seminar and Webinar on Recent progress in modelling of durability and cracking in concrete structures

Organizer：

Materials Division

Date, Time & Venue

18 January 2021 (Monday), Time: 6:30 -8:00 pm at 9/F, Sophia Chan Yat Mei Room at the HKIE Headquarters

Speaker: Dr Shengjun Zhou

Dr Shengjun Zhou is a Director and the National Engineering Manager – Bell Asset Engineering Pty Ltd in Australia.  He has 35 years’ experience in concrete engineering and research.  He received a PhD Degree in the University of Dundee in UK and a Master Degree in Tsinghua University in China.  He has worked in BCRC, Ancon Beton, AECOM, SMEC (casual), and GHD (casual) as a Principal Engineer/Consultant or technical director.  He was R&D Manager in Boral and Research Fellows in Dundee University and National University of Singapore.  He has key contributions to developing new generation models for chloride diffusion and carbonation in concrete structures to estimate their service life and for early age thermal modelling to control the related cracking.  He established the third-generation (3G) analytical chloride models for concrete with an increasing surface chloride level and a decreasing diffusivity and also the third-generation (3G) numerical models to predict concrete carbonation under gradually changing climate conditions (CO₂, temperature and humidity). These models are more suitable and accurate than the previous generations and have been used in various projects for durability design and condition assessment of concrete structures.  His latest paper resolved the long-term confusions regarding the relationship between two second generation (2G) chloride models widely used currently by many designers.  He developed new thermal models for concrete elements on ground, in cylinder shape and with cooling pipe system.  He has professional qualifications of CPEng, NER, and RPEQ.  He is a member of various technical committees in ACI and CIA.

Programme Highlights

1.     Deterioration Mechanism due to Reinforcement Corrosion

This includes transport modes of deleterious media in concrete, deterioration mechanism due to reinforcement corrosion, influencing factors and research outcomes.

2.     Modelling Service Life in Design and Assessment

This includes durability design methods, their features, principle of chloride modelling, technique development, third generation (3G) analytical models for chloride diffusion, and 3G numerical models for carbonation, its application in service life design and in estimating residual life, and some project examples. 

3.     Effect of Cracks on Concrete Durability

This includes brief discussion the effects of cracking and crack width of concrete on chloride diffusion, on carbonation, on reinforcement corrosion, on service life and the crack width limits.  

4.     Thermal Modelling and Cracking Analysis

This includes mechanism of thermal/shrinkage crack formation; numerical modelling of temperature distribution in concrete with particular thickness, mix proportions, raw materials, initial temperature, weather condition and formwork/insulation and cooling pipe system; evaluation of external restraint, cracking analysis, control measures, and project examples etc.

Registration &  Enquiries

The seminar /webinar is free of charge with maximum of participants of 20 for the physical seminar and webinar with 100.Registration is required. The applicants please fill the HKIE registration form (Standard Reply Form) and email to. irdngpl@gmail.com

Deadline for application is set on 13 January 2021. Successful applicants should be notified before 15 January 2020. CPD certificate will be issued after the seminar/webinar. For enquiries, please contact Ir Dr PL Ng at 95875310 or Ir CS Lam at 91527659.