L&G Engineering Laboratory's Engineers and staff are Pre-certified by the Texas Department of Transportation & Certified by the American Concrete Institute to perform work in several different categories such as Asphaltic Concrete (Hot-Mix Asphalt) and Portland Cement Concrete (Ready-Mix Concrete).

 

Portland Cement Concrete and Raw Material Sampling and Testing is performed in accordance with the TXDOT's Manual of Testing Procedures and the American Concrete Institute procedures. All Sampling and Testing will be performed by experienced ACI- Field Grade I Certified Personnel. The technician will review & record batch weights and determine compliance with approved Concrete Mix Design & applicable tolerances. Sampling and Testing will be performed at specified intervals (Samples will be obtained and Tested for Slump, Air Content, Temperature and if required, Uniformity, Compressive / Flexural Strength) In addition, the technician will provide a visual inspection of the production plant to ensure that all equipment meets project specifications (chemical admix burettes, aggregate stock piles, truck mixers).

 

Texas Department of Transportation Test Procedures

• Tex-417-A "Unit Weight, Yield, Air Content of Concrete"
• Tex-409-A "Free Moisture & Water Absorption in Aggregates"
• Tex-422-A "Measuring Temperature of Freshly Mixed Concrete"
• Tex-415-A "Slump of Portland Cement Concrete"
• Tex-416-A "Air Content of Concrete by the Pressure Method"
• Tex-447-A "Making and Curing Concrete Test Specimens"
• Tex-418-A "Compressive Strength of Cylindrical Specimens"
• Tex-424-A "Obtaining and Testing Drilled Cores of Concrete"
• Tex-472-A "Uniformity of Concrete"

 

American Concrete Institute Test Procedures

• ASTM C1064 "Temperature of Freshly Mixed Hydraulic-Cement Concrete"
• ASTM C172 "Sampling Freshly Mixed Concrete"
• ASTM C143 "Slump of Hydraulic-Cement Concrete"
• ASTM C138 "Unit Weight, Yield, and Air Content (Gravimetric) of Concrete"
• ASTM C231 "Air Content of Freshly Mixed Concrete by the Pressure Method"
• ASTM C173 "Air Content of Freshly Mixed Concrete by the Volumetric Method"
• ASTM C31 "Making and Curing Concrete Test Specimens in the Field"

 

Certifications: American Concrete Institute

• Concrete Testing Field Technician Grade I
• Aggregate Testing Technician Level I

 

 

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