NICET CMT Soils case studies
NICET CMT Soils · Put your knowledge to work in context.
NICET CMT-Soils is one of the Construction Materials Testing (CMT) certification programs listed by the National Institute for Certification in Engineering Technologies (NICET) under its Civil Engineering Technology Programs, alongside CMT-Asphalt, CMT-Concrete, Highway Construction Inspection, and the optional CMT Performance Examinations. It is aimed at technicians who sample, test, classify, and inspect soils on construction projects - laboratory work such as gradation, plasticity, moisture-density relationships, and classification; field work such as density and moisture testing for compaction control; inspection of subgrade preparation, embankment fill, and structural backfill; and the documentation, specification, and ethical responsibilities that surround that work. The NICET CMT Soils case studies are 5 cases and about 2,711 words.
1Borrow Pit Classification and Specification Review
A technician receives a 35 lb bag from a proposed borrow pit for structural fill. The sieve analysis reports 21% retained on the 3/4-in.
565 words, about 3 min2Nuclear Gauge Versus Sand Cone Discrepancy
During compaction control on a 12-in. lift of silty sand embankment fill, a nuclear gauge in direct-transmission mode with a 6-in.
553 words, about 3 min3Proofrolling a Wet Fat Clay Subgrade
At a building pad, the contractor has scarified and recompacted the upper 12 in. of a fat clay subgrade (CH, LL 62, PI 34).
523 words, about 3 min4Pressure to Alter a Stockpile Report
Late Friday, a contractor's superintendent asks you to reissue a soils report for retaining-wall backfill. The original report states that the sample from the stockpile had 38% passing the No.
553 words, about 3 min5Heavy Compaction Behind a Retaining Wall
A 3.5 m high cantilever retaining wall is being backfilled with free-draining granular material classified SW-SM with about 12% fines. The contractor is using a large vibratory roller within 1.5 m of the wall, placing lifts about 450 mm thick.
517 words, about 3 min