For questions & feedback about this area of Connect NCDOT, contact Materials and Tests.
Staff contacts for Materials and Tests.
Q1. What tests are performed on aggregates and where do I take them?
A1. Three labs at the Materials and Tests Central Lab perform aggregate testing:
Note: Except yearly quality samples, all aggregates may be taken to the
Geomaterials Group Central Lab in Raleigh or one of the regional labs across the state. Aggregate samples need to have the appropriate sample tag attached to them.
Q2. What is Alkali-Silica Reaction (ASR) and what aggregate sources have been known to have issues with this in concrete mixes?
A2. An explaination of what ASR is and the aggregate sources that have had issues with this is explained in
Q3. Who do I contact for annual Nuclear Gauge Calibrations?
A3. See letter "Approved Nuclear Density Gauge Calibration Service Providers" - May 2016
Q4. Who do I contact in my division with other questions regarding Conventional Density (Soil, ABC) or Density Gauge Questions?
A4. Contact the nearest Technical Trainer in you area.
Q5. Where do I find current unit weights for quarry aggregates?
A5. Check the
Aggregate Base Course Density Database
Q6. Where do I find specific gravity, Absorption, Fineness Modulus, and Sulfate Soundness data for approved aggregate sources?
A6. See the
Yearly Coarse and Fine Aggregate Data Spreadsheet.
(This is an Excel Spreadsheet)