CMA TO HOLD WORKSHOPS ON OUTFALL SEWER DESIGN:
Article Date: 05 June 2009
 The Concrete Manufacturers Association (CMA) is to hold at least five workshops on the design of concrete outfall sewers later this year. The workshops are being planned as a result of the considerable interest generated by four seminars on the same subject, which were run by the CMA in May.
The workshops will be held in venues in the same cities as the seminars; in Johannesburg, Cape Town, Port Elizabeth and Assagay in KwaZulu-Natal.
Of the 234 delegates who attended the seminars approximately 40% have expressed an interest in attending the follow-up workshops. Moreover, the CMA has received a request to hold the sewer design seminar and a workshop in George, owing to the interest being expressed by George’s civil engineering community.
As workshops are interactive and entail practical work, they will be restricted to between 10 and 15 attendees each. They will be led by well-known pipe expert, Alaster Goyns. A Pr Eng with a Bsc Civil Eng and an MBL, Goyns also presented the seminars.
He spent 21 years in the concrete pipe industry before starting his own consultancy some 10 years ago, specialising in gravity pipelines and trenchless rehabilitation. He has written several papers on sewer corrosion and trenchless rehabilitation, and has presented them both locally and internationally.
Since 1999 he has managed the Virginia Sewer corrosion project on behalf of the concrete pipe industry. He was a founder member of the sewer study group initiated in 1987 that motivated the inclusion of this live experimental section during the construction of this sewer.
The implementation of this project and its monitoring over the first five years was undertaken by the CSIR. Subsequent phases have been monitored by the concrete pipe industry in conjunction with the University of Cape Town.
A series of pipe materials were evaluated over a 14 year period under extremely aggressive conditions at Virginia and the results have been used in a design manual for the prediction and control of corrosion in sewers. Copies of the manual were provided at the seminars and will be available at the workshops. Some of the original samples are still in the sewer and these, together with some recently installed cementitious samples are being monitored on a regular basis.
A nominal charge of ±R600 depending on numbers and location will be levied to cover costs of the workshops. Interested parties should contact Pam at the CMA on main.cma@gmail.com or on (011) 805-6742.
Ends
Alaster Goyns, independent consultant, seen here during his Midrand presentation on the design of outfall sewers.
Seventy five people, pictured here at the Bytes Conference Centre in Midrand, attended the first of four seminars on the design of concrete outfall sewers.
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