Laboratory Testing Services:

CHJ's testing laboratory enjoys the reputation of being one of the leading materials and soil testing laboratories in Southern California. The laboratory's record of "Service to our Clients" and technical excellence makes it the testing laboratory of choice for many contractors, material producers, and project owners throughout Southern California.

Our laboratory can perform testing of the full range of construction materials and soils. These capabilities include rock products such as aggregates and base materials, concrete, masonry materials and reinforcing steel. Our 400,000-pound capacity Baldwin testing machine is one of the largest in the area and is capable of testing large reinforcing bars and masonry prisms. The soil mechanics laboratory can perform numerous testing services including, sieve analyses, optimum moisture - maximum density, consolidation, direct shear, and R-value tests. Asphalt concrete can be tested for asphalt content, aggregate gradation, and stability, as well as other qualities. We also test built-up roofing, spray-applied fireproofing, welds, bolts, and other construction related materials.

All tests are performed by qualified and experienced technicians. The Laboratory Supervisor and several of our technicians have been with CHJ for over 20 years. All testing is overseen and reviewed by Professional Engineers. Our laboratory meets the requirements of ASTM E 329 "Standard Recommended Practice for Inspection and Testing Agencies for Concrete, Steel, and Bituminous Materials as Used in Construction" and is regularly examined by the Cement and Concrete Reference Laboratory of the National Institute for Standards and Testing. Our laboratory is also approved by the State of California, Caltrans LEA No. 62, and the City of Los Angeles.

Photographs of Our Laboratory and Equipment

Double Ring Infiltrometer Percolation Test

Universal Testing Apparatus, 400,000lb. Capacity This steel-strength testing equipment is one of the largest machines in Southern California.

Moisture Density Tester

Consolidation Tester

Mini Universal Strength / Compression Tester Used for concrete beams, cylinders, and small steel rebar.

Drill Rig This is one of the Drill Rigs we utilize for our Geotechnical Investigations.

Curing Room