Materials and Tests Manual  

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 this brief​.

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)