ACI Strength Testing study guide
ACI Strength Testing · Work through your exam, one topic at a time.
The Concrete Strength Testing Technician credential is one of the certification programs offered by the American Concrete Institute. ACI describes its certification programs as designed to form a minimum qualification for personnel employed within the concrete construction industry, and it lists the Concrete Strength Testing Technician under its Laboratory Concrete Testing offerings, a category ACI says assesses the knowledge and ability to perform, record, and report the results of concrete field and laboratory tests. The credential therefore suits technicians and laboratory staff who prepare, handle, and test concrete specimens and report the resulting strength data, as well as the supervisors who review that work. Because examinations and optional training courses are conducted through an international network of sponsoring groups, candidates register and test through a local sponsoring group rather than a single central location. Topics on this exam: Laboratory Concrete Testing and Concrete Strength Testing Procedures. The ACI Strength Testing study guide has 2 sections and about 614 words.
01Laboratory Concrete Testing: Specimen Preparation and Initial Curing
Laboratory testing is where the specimen's history is fixed. A candidate must understand sampling, specimen molding, consolidation, initial curing, and the records that make results defensible. A strength specimen is only as representative as the sample. The sample must be taken from the middle portion of the discharge, remixed before molding, and never obtained from the first or last part of a batch.
319 words, about 2 min02Concrete Strength Testing Procedures: Test Execution and Interpretation
Strength testing converts a cured specimen into a number that drives acceptance decisions. The candidate must understand test methods, machine requirements, loading rate, failure mode, and how to interpret results. Compressive strength is the primary acceptance test. Know the difference between cylinder and core testing, and that the test method specifies specimen dimensions, capping or grinding of ends, and alignment.
295 words, about 1 min