Construction Technology Laboratories, Inc. dba CTL Group
Mount Prospect,
Illinois
View Accreditation Certificate
Mark
Finnell
1050 East Business Center Drive
Mount Prospect
,
Illinois
60056
Phone: (847) 972-3162
Fax:
mfinnell@ctlgroup.com
http://www.ctlgroup.com
26-1728 : The entire accreditation has been suspended
Quality Management System - accredited since 1/10/2011
C1077 (Concrete), C1222 (Cement), E329 (Concrete)
Aggregate - accredited since 8/21/2002
C29, C40, C88, C117, C123, C127, C131, C136, C142, C295, C535, C566, C702, D4791, D5821
Concrete - accredited since 8/21/2002
T336, C31 (Beams), C31 (Cylinders), C39, C42 (Drilling Cores of Concrete), C42 (Testing Drilled Cores of Concrete), C78, C138, C143, C157, C172, C173, C192, C215, C231, C232, C233, C305, C403, C457, C469, C496, C511, C666, C672, C779, C856, C1064, C1105, C1138, C1152, C1202, C1218, C1260, C1293, C1399, C1542, C1550, C1567, C1603, C1609
Ultra-High Performance Concrete - accredited since 2/10/2020
C1856 (Sampling), C1856-C31 (Cylinders), C1856-C31 (Prisms), C1856-C39, C1856-C42 (Testing Drilled Cores of Ultra-High Performance Concrete), C1856-C157, C1856-C192 (Cylinders), C1856-C192 (Prisms), C1856-C341, C1856-C469, C1856-C511, C1856-C666, C1856-C1202, C1856-C1437, C1856-C1609
Cement - Physical Tests - accredited since 8/21/2002
C109, C114 (Loss on Ignition - Reference), C151, C183, C185, C187, C188, C191, C204, C266, C305, C430, C451, C452, C511, C596, C1012, C1038, C1437, C1702
Pozzolan - Physical Tests - accredited since 8/21/2002
C109, C151, C157, C185, C187, C188, C305, C311 (Loss on Ignition), C311 (Moisture Content), C430, C441, C511, C1012, C1437
Slag Cement - accredited since 12/4/2014
C109, C185, C188, C204, C305, C430, C511, C1437
Cementitious Material - Chemical Tests - accredited since 9/4/2002
C114 (Aluminum Oxide – X-Ray Fluorescence)
C114 (Calcium Oxide – X-Ray Fluorescence)
C114 (Chloride – Reference)
C114 (Ferric Oxide – X-Ray Fluorescence)
C114 (Insoluble Residue – Reference)
C114 (Loss on Ignition – LECO Furnace)
C114 (Magnesium Oxide – X-Ray Fluorescence)
C114 (Manganic Oxide – X-Ray Fluorescence)
C114 (Phosphorus Pentoxide – X-Ray Fluorescence)
C114 (Potassium Oxide – X-Ray Fluorescence)
C114 (Silicon Dioxide – X-Ray Fluorescence)
C114 (Sodium Oxide – X-Ray Fluorescence)
C114 (Sulfide Sulfur – Reference)
C114 (Sulfur Trioxide – X-Ray Fluorescence)
C114 (Titanium Dioxide – X-Ray Fluorescence)
C114 (Water-Soluble Alkali – Atomic Absorption)
C114 (Zinc Oxide – X-Ray Fluorescence)
Please note that our accreditations do not include an expiration date. An accreditation only expires when the laboratory fails to comply with our accreditation requirements.
* This information is only valid as of 6/13/2026. Please visit https://aashtoresource.org for current accreditation status.
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