Quality Control Testing

Quality Control Testing

Scope of Services

Material Sampling, Testing & Analysis


  • Particle Size Analysis
  • Specific gravity
  • Hydroscopic Moisture
  • Angularity
  • Hardness
  • Unit Weight
  • Absorption

Concrete (flat work, pipe and CMUs)

  • Mix Design & Verification
  • Compressive & Flexural Strength
  • Concrete Core Samples & Testing

Cements and grouts
Masonry units


Our in-house testing lab has achieved accreditation or
certification by several agencies:

  • The American Association of State Highway and Transportation Officials (AASHTO) AMRL Proficiency Testing, the primary accreditation body for construction material testing in the United States.
  • Cement and Concrete Reference Laboratory (CCRL), an agency committed to the improvement of quality testing in the construction materials industry through laboratory assessments, proficiency samples, instruction, guidance, and clarification of ASTM standards.

Our quality control group has over 50 years of combined experience and participates in a number of qualification programs:

  • Wisconsin Department of Transportation
  • Minnesota Department of Transportation
  • Iowa Department of Transportation
  • Illinois Department of Transportation
  • NPCA-National Precast Concrete Association
  • Precast/Prestress Concrete Institute (PCI)
  • Wisconsin Ready Mix Concrete Association (WRMCA) for Concrete Field/Lab testing and Concrete Mix Design testing
  • American Concrete Institute (ACI)


Our Testing Laboratory is staff ed to respond rapidly to most situations involving aggregate and concrete testing and evaluation. Our personnel follow rigorous quality assurance/quality control policies and procedures to ensure the integrity of the scientific data on which decisions are based. Technicians utilize a variety of testing methods as necessary to characterize the materials and site conditions and provide prompt recommendations. Our Mobile Laboratories are well equipped to perform field and laboratory testing on aggregates and concrete at the project site or material source in order to provide test results on an expedited basis. All of our fi eld and laboratory reports are computer generated. Our reporting formats include all the information required by specific test standards. Reports are concise, reference-specified requirements and specifically address whether construction methods or materials are in compliance.

 cylinder test 1

Concrete Cylinder Compressive Strengths Test

aggregate moisture 1

Aggregate Moisture Test


Since 2006, County Ready Mix’s Testing Laboratory has provided in-house lab and field testing services for municipal, commercial and industrial clients and project applications of all sizes.

 hwy 51 29 testing

Hwy 51 and Hwy 29 Interchange

hwy 10 testing

Hwy 10 Bridge Crossing

1st wausau testing

First Wausau Towers-Dudley Building

Contact Us

Call County Ready Mix when you need professional materials testing from a certified laboratory.

(800) 289-2569
205 North Street
P.O. Box 100
Marathon, WI 54448

You are welcome to schedule a meeting with key project personnel and tour our laboratory. Should you have questions or wish to request additional information, please contact Mike Strong or Chris Kirchner.

Quality Control Testing Quality Control Testing