Concrete

Concrete is one of the most important construction materials. Because so many factors interact to affect the ultimate quality of concrete, it has earned a reputation as one of the most variable construction materials. Converse has knowledge, experience and expertise to deal properly with the quality assurance of concrete. During the concrete placement our scope of work may include:

• Review concrete mix designs, product mill certificates for compliance.
• Perform batch plant inspection.
• Review each batch ticket, inspect concrete placement, and test concrete slump.
• Provide minimum of one test for each type of cement and aggregate for conformance to the working drawings and specifications for mix designs.
• Verify concrete meets the specified strength and in required areas of locations.
• Fabricate and pick-up concrete cylinders.
• Monitor concrete tests results and advise for non-conforming tests.
• Prepare Concrete samples and Test concrete for compressive strength. Test one cylinder at seven days and two at twenty eight days retain one cylinder for possible test at fifty six days.
• Perform pull/torque test of epoxy rebar, drilled in anchors, high strength bolts and ceiling wires.
• Prepare reports summarizing all observations and test results.

Reinforcing Steel

The purpose of reinforcing steel observation is to give assurance that the supplier is exercising satisfactory control over production, fabrication and placing of reinforcing steel so that it meets the project specifications and applicable codes and industry standards. In this process we typically:

• Review material identification/mill certification sheets to ensure that steel meets project manual specifications.
• Sample and test reinforcing steel (e.g. bend and tensile tests).
• Sample and test mesh (as required).
• Inspect welds to meet conformance with Project Specifications.
• Verify welding procedures, welding operators and welders in accordance with AWS D1.1.
• Inspect welded reinforcing bars according to codes.
• Conduct High Strength Bolting Inspection, test bolts, nuts and washers per codes.
• Prepare reports summarizing all observations and test results.