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Understanding Concrete Defects, Diagnosis and Repair

INTENDED FOR

Technicians and Engineers who need a basic understanding or revision of concrete deterioration mechanisms, methods of diagnosis, and techniques for concrete repair. The course is intended as a stand alone course or can be combined with our course on Concrete for Engineers and Contractors, to make a 2 day course.

MAX PARTICIPANTS - 10-15

THE SPEAKER

Professor Michael Grantham BA EurChem CChem FRSC IEng MCQI CQP MICT

Mike has worked for several of the major testing houses in a career spanning some 30 years. He has been involved in a considerable amount of testing work on bridges and other heavy structures such as; car parks, office buildings, multi-storey flats, down to small scale problems with prc housing. He is a Visiting Professor at Queen's University, Belfast, lecturing on their concrete durability course.

TARGET BENEFITS

After the course, participants will have an understanding of deterioration mechanisms for concrete, methods for diagnosis of these problems, including some of the newer techniques such as linear polarisation, radar, infra red thermography etc. They will understand how these techniques are applied in diagnosis, how concrete repairs can effectively deal with the problems.

9.00  Registration and Coffee
9:30 What is concrete: constituents, cement, aggregates, steel, admixtures. Special problems arising from the use of materials. Carbonation of concrete, calcium chloride, high alumina cement.
  Recognising concrete defects: Structural cracks, reinforcement corrosion, alkali silica reaction, frost damage, shrinkable aggregates, chemical attack, fire damage, poor quality construction, plastic cracking - plastic settlement and plastic shrinkage cracks.
10:30 Coffee
11:00    Investigation of defects - the Two Stage Approach
  Desk study, visual surveys, covermeter survey, ultrasonic pulse velocity surveys, sampling by coring and dust drilling, chemical analysis, determining compressive strength, petrographic examination, rebound hammer, other near to surface tests - the Windsor Probe, the LOK test, break off tests, sub surface radar, infra red thermography.
12:30   Questions and discussion
1:00 Lunch
2:00   Testing for reinforcement corrosion: Half cell potential, resistivity, linear polarisation measurements to determine corrosion rate of steel (section loss per year).
3:00 Tea
3:30 Concrete repairs: the patch repair approach - when to use and when not to use it, understanding the cost implications and remeasurement. Electrochemical repair: cathodic protection, realkalisation and desalination. What they do, how they work, practical experience. Corrosion inhibitors, what they are and do they work?
4:45   Questions and discussion
5:00 Course closes

All delegates will be given a certificate of attendance. Full and detailed course notes, with photographs and illustrations are provided on CD-ROM (80+ pages).