Construction Materials Testing

CMT operates construction materials testing laboratories capable of performing in-house or onsite testing and inspection services. CMT’s permanent facility located in West Valley City, Utah and the company also offers mobile testing to serve the Intermountain West. CMT’s equipment certification and calibration is on record with the National Institute of Standards and Technology through the AASHTO program. In conjunction with a highly trained staff and certified laboratory, CMT produces a quality service with the shortest possible turnaround time for our clients.

 

Asphalt

Our experience in Hot Mix Asphalt design or QA/QC testing is unmatched throughout Utah. Our asphalt services include:

asphault
  • Gyratory Compactions
  • Nuclear Density
  • Incineration/Gradation
  • Unit weight bulk and rice
  • Marshall One Point
  • Superpave
  • Depth and Density
  • Mix Designs

Concrete

Testing of Portland Cement products is considered a basic component of all civil laboratories. CMT employs all the necessary means to monitor the quality and confidence of our testing system. This includes expert design and routine statistical analysis of data. Our concrete services include:

concrete
  • Field air content and slump
  • Core compressive strength
  • Flexural Strength
  • Mix Design
  • Trial Batch

Cross Hole Sonic Logging

color-graph

Crosshole sonic logging (CSL) is becoming a widespread tool use for quality assurance of the concrete placement in drilled shaft bridge foundations. CSL logging is a NDT method which involves ultrasonic signal transmission through the shaft between parallel tubes which are attached to the reinforcing steel cage. A transmitter probe and a receiver probe start there scan from the bottom of the shaft. The transmitter emits a signal approximately every two inches as the probes are simultaneously raised to the top of the shaft. The direct line in-between the transmitter and receiver is the test section and is represented by a line of data listed on the illustration. As anomalies are detected note the lost of signal strength at 29 feet a more advanced, higher-end analysis that creates a mock 3-dimensional graphical display of the concrete soundness throughout the pile is known as Crosshole Tomography (CT). CT is an imaging method analogous to CAT-scanning in the medical industry and uses acoustic waves. After the CSL is performed, to obtain more information about the size, shape, location, and severity of a suspected defect in a shaft. This will allow engineers to determine the consequence of the flaw in the drilled shaft. In the worst cast the engineer may elect to repair the defect by drilling and grouting the defect.

Maturity Meters

meter

Tracking changes in concrete temperature is the first step in estimating the strength and quality of the finished product. Maturity meters are a great way to measure both temperature and maturity utilizing a hand held sensor without the hassle and cost of casting and breaking as many beams and cylinders.

CMT has provided this service throughout the Utah area specifically for the municipalities providing them a least cost method of concrete testing.

Creep Testing

The creep of concrete is the most important time-dependent deformation to be considered in design stage because it is one of the biggest sources of loss of stress in prestressed concrete A creep test involves a compressive specimen under a constant load maintained at a constant temperature. Measurements of strain are then recorded over a period of time. During design engineers need to consider creep shrinkage so the element that are intended to have post tensioning cables will maintain their intended geometric length, loss of length will reduce intended post tension load and thus effect the life cycle of the structure.

creep

creep-graph

Soils

We specialize in the evaluation of soils and aggregates including pre-qualification and verification testing. Our capabilities include measurement of bearing capacity to electrochemical values. We also perform soil mechanic test methods including:

soils

  • Atterburg Limits
  • California Bearing Ratio
  • Consolidation
  • Triaxial Compression
  • Moisture Density Relationship