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Civil Engineering/Repair of Column Cracks

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QUESTION: hi..im a newly licensed civil engineer in the Philippines..im about 23 and still an amateur in the business.. What depresses me is the future of civil eng'g as it stands now.. civil engineering, to me, is reduced to mere routinary activities and management.. unlike mechanical or chemical eng'g, the future for expansion and discovery seems dim..should a youngster  like me be interested in irrigation or ,say, environmental  eng'g, i would be bound by the restrictions of technicalities and  inexperience- which i think oppresses talent and fair opportunity..add to that the low job opportunities for us youngsters. As an expert and experienced in the field of civil eng'g, what do advice would you give to a far-fetched  ambitious visionary as myself? many thanks

ANSWER: Hi Nords,

I would not paint such a pessimistic picture- Civil Engineering is a fantastic career, with lots of opportunities around the world in different aspects of it. You are just starting your career and no doubt will have ups and downs, but have perseverence, get some experience behind you and then you will really enjoy the work ahead.

As for which subjects to follow- this depends on your interests, but in the beginning accept whatever work experience you can get, even if some of it is voluntary/community work.

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QUESTION: thankx... a diagonal crack appears on the tension side of a column just above the floor slab...the structure is one storey.. since the crack is virtually vertical, i suppose the crack extends to the footing below.. the crack is about half( or a fourth) an inch.. how do you repair a single column w/o incurring much dmage...?? my far-fetched suggestion is that you destroy the damaged part and cast it anew whilst supporting the structure.... watz ur advice? tnx agen

Answer
Hi Nords,

You have not indicated whether this is a new or old construction. If it is old, vertical cracks normally are formed due to corrossion of the main rebar. If that is the case, the best option is to remove the cracked/spalled concrete (you can put some props as temporary support), scabble the good concrete to expose the aggregate, then use a bonding agent before apply fresh sand/cement mortar.

If it is new construction, the cracks may be due to poor concrete mix, poor curing or lack of concrete cover.

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Arshad Khan

Expertise

I can answer any questions to do with civil and structural engineering consultancy and construction industry in East Africa and the Middle East, and specifically with the analysis and design of reinforced concrete structures. My particular expertise is in the aseismic design and optimisation of tall buildings.

Experience

Employment history: 36 years in Construction and consultancy in the UK, Kenya, Tanzania, Uganda, Ethiopia, Eritrea, South Africa, Somalia, Zambia, Austria, Bahrain, Kuwait, Doha and the U.A.E.

Organizations
.Fellow of Institution of Structural Engineers (UK) .Fellow of Institution of Civil Engineers(UK) .Member of the Institution of Engineers, Kenya .Registered Engineer, ERB, Kenya .Member of the Architectural Association of Kenya (Engineers Chapter) .Chartered Engineer (UK)

Publications
•1984: International Conference on the Art and Practice of Structural Design, London •1994: 3rd Int. Kerensky Conference in Structural Engineering, Singapore •2008: International Conference on High-Rise Towers, Abu Dhabi

Education/Credentials
BSc, 1st Class Hons, in Building Engineering, University of Bath, UK MSc in Concrete Structures and Technology, University of London. Diploma of Imperial College, UK.

Awards and Honors
•Science Congress Special Award (for 2-seater Hovercraft - 1968) •Institution of Civil Engineers Award for outstanding performance at Bath University (1975) •Concrete Society Postgraduate study Bursary Award (1976) •Consular Representative for British High Commission, Nairobi. (1995 to 1998) •Examiner for Institution of Civil Engineers Professional Interviews, Nairobi. (1997 to 1998) •Branch Representative in Vienna for PI assessment for Inst. of Struct. Engrs. (1999 to date)

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